Answer:
The correct answers would be natural selection and high genetic variation in the species.
Natural selection refers to the natural phenomenon by which organisms which are better adapted or have survival traits tend to survive and reproduce more in the environment.
It leads to an increase in the frequency of the trait in a population.
Genetic variation refers to the sum total of all the genetic characteristics present in a population. Higher genetic diversity higher are the chances of a population to survive.
Similarly, different sizes of the beaks are the result of high genetic diversity out of which large size beak was favored by natural selection.
Ultimately, the large beak size trait spreads through the population.
Answer:
Bottle neck effect
Explanation:
Bottle neck effect in Biology, refers to a phenomenon in which some environmental factors (droughts, disease, fires, floods, earthquakes or famine etc) or man made causes (like hunting) lead to a severe reduction in the size of population of a certain living organism.
This type of events not only lower the variation in the population genepool causing lack of genetic diversity, but also reduce the overall size of population.
The mentioned scenario in the question is an example of Bottleneck effect in which genetic diversity of the pigeon population was decreased due to man made activity i.e Hunting.
Hope it help!
Answer: You can be hungrier more often. Your bones become weaker and easier to fracture. Your immune system weakens because your antibodies become less effective. It could lead to a build up of fluids and cause your feet to swell. Your hair becomes brittle and falls out. Your nails become brittle. Eating less proteins puts you a a higher risk of high blood pressure. Your muscles get weaker. And your skin gets flaky.
Explanation:
Answer:
True
Explanation:
The calcitonin/calcitonin gene-related peptide (CALCA) gene is used to encode different peptide sequences (i.e., calcitonin hormone, calcitonin-related peptides and katacalcin) through alternative RNA splicing. These peptides have different functions. Calcitonin is a hormone mainly produced by cells of the thyroid gland, which is involved in the control of levels of calcium and phosphate in the blood. Moreover, katacalcin is a peptide synthesized from the same precursor of calcitonin (and therefore also mainly produced by cells of the thyroid gland), which is implicated in both calcium regulation and skeletal maintenance. Finally, the calcitonin gene-related peptide (CGRP) is a peptide mainly produced by sensory nerves (type Aδ fibers ), which is involved in pain pathways. The CALCA gene has attracted considerable attention from geneticists because it is specifically expressed in neuroendocrine tissues in normal conditions and abnormally induced in septic conditions (i.e., during the body's extreme response to an infection).
The production of haploid (n) gametes is the main purpose of Meiosis, Love