What effects will be manifest in an extremely small population with little to no migration?
Answers
An extremely small population with little to no migration can have several effects.
These effects include an increased risk of genetic drift and inbreeding depression.
Genetic drift: Genetic drift is a random change in allele frequencies that occurs in small populations. Since smaller populations have less genetic variation, genetic drift is more common. Genetic drift can reduce genetic diversity in a population, which can lead to the fixation of deleterious alleles.
Inbreeding depression: Inbreeding depression is a loss of fitness that occurs when closely related individuals mate and produce offspring. Inbreeding depression can occur when a population becomes small and isolated, and the mating pool is reduced. Inbreeding depression can lead to reduced fertility, increased susceptibility to disease, and lower survival rates.
Additionally, inbreeding depression can reduce genetic diversity in a population, which can make it more susceptible to environmental change. Therefore, an extremely small population with little to no migration can lead to an increased risk of genetic drift and inbreeding depression.
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Related Questions
Alice was participating in a photosynthesis lab for science class. The lab procedures instructed Alice to prepare a test tube containing water, a sprig of elodea (a common aquarium plant), and 10 g of sodium bicarbonate (NaHCO3). She was then instructed to place the test tube in front of a strong light source for one minute. Alice noticed tiny bubbles forming on the leaves of the elodea. What is the most logical explanation for why Alice saw bubbles forming on the leaves of the elodea?Group of answer choicesThe bubbles formed as a result of the hydrogen from the sodium bicarbonate mixture dissolving the elodea leaves.The bubbles formed from the release of water molecules from the elodea leaves.The bubbles formed as the elodea plant released oxygen from the elodea leaves.The bubbles formed as the elodea plant released carbon dioxide from the elodea leaves.
Answers
Step 1.
Write down the experiment data.
- tube containing water;
- alodea (photosynthetic organism);
- 10 g of sodium bicarbonate;
- light source.
Step 2.
Why bubbles are formed on the leaves of the alodea?
The experiment have all the condictions for photosynthesis, since it provides: water (that is in the tube), CO2 (because of the dissolved sodium bicarbonate), light (because of the string light source). Therefore the most ogical explanation for Alice experiment results is: the bubbles formed as the elodea plant releases oxygen from the elodea leaves, that because with all the elements in the experiment the plant can do a normal photosynthetic process that way realing oxygen in the tube and forming bubbles of "air".
Passage 1: Two or more individuals trying to use the same resource, such as food, water, shelter, space, or sunlight, is called competition. Because resources are in limited supply in the environment, the use of them by one individual or population decreases the amount available to other organisms. Competition also occurs between individuals within a population. The elk in Yellowstone National Park are herbivores that compete with each other for the same food plants in the park. According to passage 1, competition occurs between which of the following?
Answers
Answer:
between individuals
Explanation:
Given in paragraph
You are unable to collect capillary blood from the finger of a child who has cold hands that appear bluish. What term is used to describe the color of this child's skin in the documentation of failure to collect a specimen
Answers
Cyanotic is the term used to describe the colour of the child's skin in the documentation of failure to collect a specimen.
Cyanosis is characterized by a shift in the colour of human tissues to a bluish-purple tone. This colour change occurs as a consequence of reduced levels of oxygen being attached to the haemoglobin in the RBCs of the capillary bed. The lips, mucous membranes, nail beds, and ear lobes are among the most common areas on the body to exhibit cyanosis as these areas have thinner layers of skin than other parts of the body. In addition to cyanosis, a bluish discolouration of the skin tissue can be caused due to the consumption of food products with blue or purple dyes.
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If mitosis divides a cell with 100 chromosomes, how many chromosomes will the new cell have?
Answers
Which three elements are common to the reactants and the products of
both photosynthesis and cellular respiration?
o
Carbon, hydrogen, and oxygen
Carbon, hellum, and oxygen
o
Oxygen, Hydrogen, and chlorine,
Oxygen, hydrogen and chlorine,
CLEAR ALL
Unanswered
(PREVIOUS
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HEVY
Answers
Glucose is used to provide energy to the muscles and tissues to the body, while plants use glucose to produce starch
Across a normal cellular membrane, the potential is maintained with a positive charge on the outside of the cell and a negative charge on the inside of the cell. Which of the following best explains the operation of the voltage sensor in the voltage-gated sodium channel? a. Under resting cellular conditions, the voltage sensor is normally pulled to the inside of the cell due to its high arginine content b. Under resting cellular conditions, the voltage sensor is normally pulled to the outside of the cell due to its high lysine content c. When the membrane is depolarized, the voltage sensor moves towards the outside of the membrane, allowing opening of the activation gate d. Both a and c occur e. None of the above
Answers
The correct answer is c. When the membrane is depolarized, the voltage sensor moves towards the outside of the membrane, allowing opening of the activation gate.
Voltage-gated sodium channels are responsible for the rapid depolarization of the cell membrane during action potentials. These channels contain a voltage sensor that detects changes in membrane potential. The voltage sensor is composed of charged amino acids, such as arginine and lysine. During resting conditions, the voltage sensor is in a closed state and is normally pulled towards the inside of the cell due to its high arginine content. However, when the membrane is depolarized, the voltage sensor moves towards the outside of the membrane, which causes a conformational change in the channel protein, allowing opening of the activation gate. This leads to an influx of sodium ions into the cell, which further depolarizes the membrane and triggers an action potential. Therefore, option c best explains the operation of the voltage sensor in the voltage-gated sodium channel.
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When asked for an example of an adaptation, a student explained, "A turtle's hard shell is an adaptation. A long time ago, a few turtles were able to make their shells harder in order to protect themselves from predators and then passed the trait of harder shells on to their offspring." Do you agree or disagree with this student? Explain why.
Answers
Answer:
I agree with the student by species
studies have been done on monozygotic twins that were separated soon after birth and raised in separate homes, often in different parts of the country. many of these twins did not know that they had a twin until after they reached adulthood. for certain traits, concordance values were found to be similar in these twins to those of monozygotic twins raised together. what can be concluded about these traits?
Answers
Monozygotic twins raised independently showed high concordance values for a few variables, indicating that these traits are highly heritable and likely impacted more by genetics than environmental influences.
The proportion of twin pairs when both twins share the same feature or disease is known as concordance. Dizygotic (fraternal) twins typically share 50% of their genetic material, compared to 100% shared by monozygotic (identical) twins. Researchers can ascertain the relative contributions of genetics and environment to the development of a specific characteristic by contrasting the concordance values of monozygotic twins reared together with those of monozygotic twins grown separately.
Given that the twins were reared in different contexts yet still showed high levels of trait similarity, if the concordance values are similar between the two groups of twins, it is likely that genetics played a significant influence in the formation of the characteristic. The concordance values, on the other hand, indicate that environmental influences have a bigger impact on the development of the characteristic if they are significantly different.
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Your lab has just discovered a molecule believed to be a new neurotransmitter. The challenge is now to prove that it fits the 3 necessary criteria to be classified as a neurotransmitter. a. Describe an experiment you can do to prove that the molecule is synthesized and stored in the presynaptic neuron. b. Describe an experiment you can do to prove that the molecule is released by the presynaptio axon terminal upon stimulation. c. Describe an experiment you can do to prove that the molecule produces a response on the postsynaptic cell that mimics its response by natural release via the pre-synaptic neuron.
Answers
The three experiments to prove the molecule is a neurotransmitter: Synthesis and storage, release by presynaptic axon terminal, and production of the same response on the postsynaptic cell as natural release.
The experiments described here will allow the scientists to prove that the molecule found is a neurotransmitter. The three experiments they can do to confirm their hypothesis are the following:
a. To prove the molecule is synthesized and stored in the presynaptic neuron, an experiment could be done where the presynaptic neuron is isolated and the molecule detected within it. They can do this by labeling the molecule and then using a microelectrode to isolate the presynaptic neuron. If the molecule is found within it, this would prove the first criterion.
b. To prove that the molecule is released by the presynaptic axon terminal upon stimulation, an experiment can be done where the presynaptic neuron is stimulated, and the released molecules detected. They can do this using a radio-labeled molecule and detect it using radioligand binding. If the molecule is found released, this would prove the second criterion.
c. To prove that the molecule produces a response on the postsynaptic cell that mimics its response by natural release via the pre-synaptic neuron, an experiment could be done where the postsynaptic neuron is isolated and then stimulated with the radio-labeled molecule. If the same response is produced as with natural release, this would prove the third criterion.
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Senetics Test-Sp2021 / 8 of 22
How does the genetic disorder sickle cell anemia support evolution by natural selection?
O A Sickle cell restricts participation in certain athletic events.
.
B. Sickle cell is found in many locations around the globe.
OC. Sickle cell causes extreme disease in persons who live at high altitudes.
OD. Sickle cell promotes resistance to malaria and as a result, it was how this trait increased in certain populations.
Answers
Determining enzyme activity Enzyme activity can be determined in the following ways: Check All That Apply O by measuring how much of the enzyme is consumed O by measuring how much of the substrate is consumed acesO by measuring how much of the product is produced O determining when the amount of substrate is equal to the amount of productO by measuring the ratio of enzyme to substrate concentration
Answers
Enzyme activity can be determined (b) by measuring how much of the substrate is consumed aces and (c) by measuring how much of the product is produced O determining when the amount of substrate is equal to the amount of product.
Usually, the purpose of cultivating bugs in a plant is to increase enzyme activity. A biological catalyst is an enzyme. They decrease activation energy, just like other catalysts, enabling processes to go in the desired direction.
They are often sensitive to the temperature, pH, and salt content of the environment they function in since their action depends on the folding of a protein. There are few exceptions to this rule, such as the enzymes used in washing powder, but generally speaking, activity may be reduced (reversibly) when slight departures from their tolerance limits occur.
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which best Compares DNA and RNA with regard to the process of protein production
Answers
Answer:
D-RNA leaves the nucleus during the process and DNA remains in the nucleus.
Explanation:
All of the following will help the skin to fight infection but one. Which of the following will have little effect on the skin's ability to fight infection? Group of answer choices More tight junctions between keratinocytes of the stratum corneum. Greater production of melanin. Increased secretions of defensins from skin cells. Greater production of keratinocytes resulting in more layers of the stratum corneum.
Answers
In order for the skin to fight off infection more efficiently and of the options listed, the correct choice would be for the skin to secrete more defensins.
Keratinocytes are the cells that constitute the epidermis. They are the most dominant cell type in this region and function to create and maintain this barrier. Though this barrier that they create does in fact aid in avoiding bacterial infection, it does little to fight off an already existing infection.
The correct answer is for the skin cells to secrete a greater number of defensins. These are small cationic proteins which are known as "Host Defense Peptides". What this means is that these defensins will either have direct anti-infection properties, or they will act as signals for the immune system.
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Describe three ways in which the olfactory system adapts to
smells.
Answers
The olfactory system adapts to smells through sensory adaptation, masking, and contrast, allowing it to become less sensitive to prolonged exposure, be influenced by stronger scents, and distinguish between different odors.
The olfactory system is a complex sensory system in which the olfactory organs in the nose respond to different smells. When we breathe in an odor, the molecules enter the nostrils, pass through the nasal cavity, and then reach the olfactory epithelium. The olfactory epithelium contains millions of olfactory receptors that are responsible for detecting different scents.
The olfactory system adapts to smells in various ways. Three ways in which the olfactory system adapts to smells are as follows:
1. Sensory adaptation: When we smell a particular odor for an extended period, our olfactory system tends to become less sensitive to that scent. This process is known as sensory adaptation.
The olfactory receptors become desensitized and become less responsive to the odor molecules over time. As a result, the brain registers the smell less intensely, and it gradually fades away.
2. Masking: The olfactory system can also adapt to smells through masking. When two or more scents are present, the olfactory system can become confused and register the odor incorrectly.
The stronger scent can mask the weaker one and make it less noticeable. For example, when we enter a room with a strong perfume scent, we may not be able to smell the other odors present in the room.
3. Contrast: The olfactory system can adapt to smells through contrast. This occurs when we move from one area with a particular smell to another area with a different scent.
Our olfactory system is highly sensitive to changes in smell, and when it detects a new odor, it adapts by contrasting it with the previous one. This contrast can make the new odor more noticeable and can help the brain distinguish between different smells.
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the population of humans on earth increased gradulaly unitil the nineteen centery, after which it increased exponitally due to the abaiblity of better medicicne and food prodict describe the kind of growth curve that human population has followed
Answers
If the population of humans have increased exponentially due to availability of medicine and food, then The S growth curve is the growth curve that has been followed.
What is the growth curve about?The kind of growth curve that human population has followed is an S-shaped logistic growth curve.
Initially, the growth rate was slow due to various factors such as limited access to resources and high infant mortality rates. However, with the advent of better medicine and agricultural practices in the 19th century, the growth rate started to increase exponentially.
As the population increased, the availability of resources became more limited, leading to a decrease in the growth rate. This decrease in growth rate is due to a combination of factors such as increased competition for resources, decreased fertility rates, and improved family planning.
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In blank each daughter cell receives an expert copy of 100% of the parent cell DNA
Answers
Answer: Mitosis is used to produce daughter cells that are genetically identical to the parent cells. The cell copies - or 'replicates' - its chromosomes, and then splits the copied chromosomes equally to make sure that each daughter cell has a full set.
how long does it take for a fertilised human egg cell to develop into a fully formed baby?
Answers
Answer:40 weeks
Explanation:
Within 24 hours of fertilization, the zygote (two combined gametes) begins to divide into many cells. Within 8 weeks of pregnancy, the embryo is now a fetus, and the total development time from a zygote to a fully formed fetus is 40 weeks, typically.
Which of these consumes other organisms for food?
Answers
Answer:
predator/carnivor
Explanation:
you didnt really give answer choices, but one of these should be it :)
it could also just be called a consumer
PLEASE HELP QUICKLY: (FIRST ANSWER GETS BRAINLIEST)
The breakup of Pangaea occurred during the _____.
Cambrian period
Mesozoic era
Paleozoic era
Answers
Answer:
Mesozoic
Explanation:
The early jurassic is when it started to break
Answer:
How did the breakup of Pangaea affect land organisms during the Mesozoic Era? The breakup of Pangaea into Laurasia and Gondwanaland resulted in climate change. Only the animals that were able to adapt to the new climate conditions survived the mass extinction.
Explanation:
right on edg
What can affect evaporation rates
Answers
Answer:
the amount of consistent or nonconsistent sunlight
Explanation:
PLEASE HELP ASAP PLEASE
1. Write the part of the brain that performs each of the functions shown below.
Regulates sleep
Connects brain and eyes
Pleasure center
Controls balance
Controls thinking
Controls breathing and heart rate
Answers
Regulates sleep: The hypothalamus; Connects brain and eyes; The optic nerve; Pleasure center; The nucleus accumbens; Controls balance: The cerebellum; Controls thinking: The prefrontal cortex; Controls breathing and heart rate: The brainstem.
Parts of the brain and their functionsThe part of the brain that performs each of the functions mentioned is as follows:
Regulates sleep: The hypothalamus, particularly the suprachiasmatic nucleus, plays a key role in regulating sleep-wake cycles.
Connects brain and eyes: The optic nerve connects the brain with the eyes, transmitting visual information.
Pleasure center: The nucleus accumbens, located in the basal forebrain, is associated with the experience of pleasure and reward.
Controls balance: The cerebellum, located at the back of the brain, is primarily responsible for coordinating balance and coordinating voluntary movements.
Controls thinking: The prefrontal cortex, located at the front of the brain, is involved in higher-level cognitive functions, including decision-making, problem-solving, and abstract thinking.
Controls breathing and heart rate: The brainstem, particularly the medulla oblongata, controls vital functions such as breathing and heart rate.
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______________ are activated b lymphocytes that produce circulating antibodies.
Antigen-presenting cells
Memory cells Plasma cells Helper cells Antigens
Answers
B lymphocytes that have been stimulated create circulating antibodies as plasma cells.
What kind of cells produce circulating antibodies when B lymphocytes are activated?A plasmablast or plasma cell forms when a naive or memory B cell multiplies and develops into an effector cell that secretes antibodies in response to an antigen. B cells are referred to as professional antigen-presenting cells since they not only present antigens but also release cytokines (APCs).
What cells do B cells activate?Linked recognition is the process through which helper T cells responding to the same antigen activate B cells in order to produce T-cell dependent antibody responses. a specific class of antibody-producing white blood cells. B lymphocytes are produced by bone marrow stem cells and are part of the immune system.
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What renal and hormonal factors will cause an increased release of aldosterone from adrenal cortex?
Answers
Answer:
Renin; angiotensin I and angiotensin II
Explanation:
Renin is a key hormone involved in the renin-angiotensin-aldosterone system (RAAS), which is responsible for regulating blood pressure in response to changes in blood volume. Renin is secreted primarily by the kidneys to promote the production of the peptide hormone angiotensin in the blood vessels. Subsequently, angiotensin stimulates the release of aldosterone from the adrenal cortex, stimulating sodium retention by the kidneys. Renin acts on its substrate angiotensinogen to yield angiotensin I, which is then converted to angiotensin II by the angiotensin-converting enzyme (ACE). Finally, angiotensin 2 promotes the release of aldosterone by the adrenal cortex, which acts on renal tubules, leading to the reabsorption of sodium and water and the excretion of potassium.
Select the correct answer from each drop-down menu. Plants use sunlight to convert nutrients into energy. What form of energy transfer is taking place?
The chemical, potential, radiant, or sound energy of the Sun is converted into chemical, kinetic, mechanical, or thermal energy by the plants.
Answers
Answer:
The chemical radiant or sound energy. If thats the way I should answer this question.
A cell is the basic unit of structure and function in living organisms. What would you call an organism made up of many cells?
Answers
Answer:
Multicellular organism, an organism composed of many cells, which are to varying degrees integrated and independent.
Explanation:
50 POINTS AND BRAINLEST!!!!
What is the chemical symbol for the element sodium?
Answers
The chemical symbol for the element sodium is referred to as Na.
What is a Chemical symbol?This is referred to as the abbreviation which is used in chemistry for chemical elements, functional groups and other types of chemical compounds.
They are derived or gotten from one or two letters from the Latin alphabet and is usually written with the first letter being in capital form. It is a very important aspect in the representation of elements in a chemical reaction or equation.
Sodium is a chemical element with the symbol Na and atomic number 11 and is an alkali metal, because it is in group 1 of the periodic table. The latin name is Natrium which is therefore the reason why Na which is the first two letters with the first in capital form is regarded as the chemical symbol.
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Answer:
the chemical symbol of the element sodium is Na
different between annual plant and Biennial plants
Answers
Answer:
Annual plants germinate, bloom, set seed and die all in one year. Biennial plants have a life cycle of two years so they germinate and grow one year, bloom and die the following. Everything which lasts longer than two years is Perennial, which in practical terms usually means it grows and flowers for many years.Explanation:
Hopes this helps. Mark as brainlest plz!Drag each label to the correct location.
Geologists study a variety of other characteristics to identify minerals, such as texture, magnetism, streak plate markings, density, and specific gravity. Use the information you have already gathered, in addition to a few other properties of minerals, to identify the seven minerals in the chart below. If you need help using the graduated cylinder or scale, consult the lab instruments and measurements guide. If you do not have access to the seven minerals given, use this resource to complete the chart.
Answers
Answer:
quartz gypsum pyrite magnetite graphite fluorite talc
Explanation:
A student observed a specimen through a light microscope.He used the objective lens marked
\( \times 40\)
.if he indiceated the
magnification of the image as
\( \times 400\)
what was the eyepiece magnifacation?
Answers
Ans
400=x*40
x=400/40=10
ans = x10
Explanation:
total magnification=eyepiece magnification*objective lens magnification
eye piece=total/objective lens
:)
Which of the following summarizes the main idea in paragraph 5?
A.Our environment will always change, and most of these changes take hundreds of years to occur.
B.Populations of a species living in different environments will develop different adaptations.
C. An oil spill causes both short- and long-term changes in the environment.
D. Many scientists believe that environmental change may have made dinosaurs become extinct.
Answers
Answer:
The correct answer is C
Explanation:
Which of the following summarizes the main idea in paragraph 5?A.Our environment will always change, and most of these changes take hundreds of years to occur.B.Populations of a species living in different environments will develop different adaptations.C. An oil spill causes both short- and long-term changes in the environment.D. Many scientists believe that environmental change may have made dinosaurs become extinct.