Answer:
Explanation:
The scenario is the following.
A population of yellow lizards lives on an island where there is no natural predator. Males of the species use the yellow color to attract females in reproductive seasons. The brighter the males are, the better their genetic quality is. Females are also yellow, but not as bright as males.
A new hawk species was introduced into the island to control some farm pests. But this hawk species prefer to feed on the lizards. The yellow color of these animals contrasts with the dark background and can be easily seen from the air. So the lizard population suffers from significant predation affecting its size sharply.
Some of the lizards then suffer from a mutation and change their color from yellow to greyish brown, which turns to be better to camouflage on the rocks and get to survive. Individuals with greyish brown color get to reproduce at a higher rate than yellow individuals, who keep being hunted by the hawk.
Eventually, after many generations, the yellow individuals decrease to near zero in the population, while greyish brown individuals increase significantly, with males still being brighter than females.
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Natural selection is an evolutive force that can act favoring an allele or against it, according to how it affects the fitness of individuals. Natural selection selects beneficial alleles and increases their frequency in the population.
When many organisms in a population sharing the same trait die, it is because they did not have good fitness, so they were not adapted to the environment and its pressures. The alleles coding for that trait were not good for the fitness of the animals, so they do not get to survive.
These individuals die before reproducing, so they could not transfer their genetic charge to the following generation. Eventually, the alleles coding for the trait will decrease in the population, probably near zero. Natural selection is acting against this phenotype. Other alleles will be beneficiated, and their frequency in the population will increase.
This change in alleles frequency is what we call adaptation.
Natural selection results in adaptation, which means the increase of the aptitude phenotype. Aptitude is the contribution of each genotype to the next generation.
In many cases, adaptations can be correlated to environmental factors or selective pressures applied by other organisms or habitats.
Let us remember that a mutation is a change or alteration in DNI sequences that introduce new variants. Many of these are eliminated, but some of them might succeed and be incorporated into each individual. These mutations are the ones that have been selected by natural selection.
So, in the exposed example, we are focussing on the lizards population.
• The selective pressure or modeling environmental factor is predation by the introduced hawk.
• The lizards´ response to predation is the survival of only those that carry mutations ⇒ greyish brown color
• Natural selection benefits these mutations.
• Greyish brown lizards survive and increase their fitness.
Ans.
Carbon is one of the four most important atoms found in cells of all living organisms and is a major constituent of biomolecules, such as carbohydrates, proteins, and fats.
When the deer is killed and eaten by the mountain lion, its dead remains are eaten by some other animals, such as vultures, jackals, and wild dogs.
These organisms that feed on dead organisms are known as scavengers. Hence, the carbon present in deer carcass would be incorporated into scavengers.
Thus, the correct answer is 'option). B.'
The answer is a. It would be incorporated into other organisms.
B: the macula and otoliths in the vestibule
C: Nociceptors in the muscles and joints
D: The crista ampullaris in the semicircular canals.
Answer:
A: stretch receptors in the muscles, tendons and ligaments
Explanation:
Proprioception (or kinesthesia) is defined as any postural, positional information transmitted to the central nervous system by stretch receptors in the muscles, tendons and ligaments, joints or skin. In other words, it is the awareness of the movements produced by our members.
These receptors are found within the somatic nervous system, responsible for the different sensory experiences received and interpreted by our body. The most basic function of receptors is to provide the central nervous system (CNS) with information about the internal conditions of organic structures and the external environment.
sulfur
nitrogen
calcium
Answer:
NITROGEN calcium
Explanation:
because it would have an chemical overflow and not be there
Answer:
nitrogen calcium
Explanation:
i took the tes
Answer:
immunoglobulins; chemokines
Explanation:
Chemicals known as ____ and ____ guide neuron.
Answer In contrast, neurons in many regions, including the cerebral cortex, cerebellum, hippocampus, and spinal cord, are guided to their final destinations by crawling along a particular type of glial cell, called radial glia, which acts as a cellular guide
A) An electrically charged object needs to touch an uncharged object before they attract or repel.
B) When an electrically charged object comes close to an uncharged object, it will attract it.
C) If an electrically charged object is near an uncharged object, it will repel it.
D) When two electrically charged objects are placed close together, they only attract.
The statement that will correct the error in Edwin's notes is as follows:
Thus, the correct option is A.
The electrically charged objects produce attraction of oppositely charged objects. For example, if a positively charged object and a negatively charged object bring close to each other, they interact with one another. Their forces act in the same direction. i.e. from the positive to the negative charge.
There is an interaction between two oppositely charged objects required in order to furnish attraction, while there is an interaction between two identical charged objects required in order to furnish repulsion.
Whether it is attraction or repulsion, it must be required that an electrically charged object needs to touch an uncharged object.
Therefore, the correct option for this question is A.
To learn more about Electrically charged objects, refer to the link:
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Invasive species are not a a threat to new
environments.
А
Invasive species increase the biodiversity of an
ecosystem
с
Invasive species can help destroy other invasive
species in an ecosystem
Answer: invasive species don’t help each other
Explanation: