Answer:
Explanation:
<u>a. How many chromosomes does a child receive from its father?</u>
Every person receives half of their chromosomes from their father and half from their mother. For that reason, if humans have 46 chromosomes in each somatic cell, 23 of them come from the father.
<u> b. How many autosomes and how many sex chromosomes are present in each somatic cell? </u>
Each somatic cell has 46 chromosomes in total; of which 22 pairs are autosomes and 1 pair are sex chromosomes. Therefore, 44 chromosomes are autosomes and 2 chromosomes are sex chromosomes (the X and/or Y chromosomes).
<u>c. How many chromosomes are present in a human ovum? </u>
The human gametes (ovum in women and sperm cell in men) have half of a somatic cell's genetic material, so that when they combine in a zygote to create their child, they form an initial cell with 46 chromosomes in total. The ovum therefore has 23 chromosomes: 22 autosomes and 1 sex chromosome.
<u>d. How many sex chromosomes are present in a human ovum?</u>
As I mentioned in the previous question, a human ovum has 1 sex chromosome. That way, when it combines with a sperm cell, which also has 1 sex chromosome, they form a zygote with <u>a pair</u> of sex chromosomes (one that comes from the mother and one from the father).
Answer: Competition
Explanation:
An ecological niche is the place of a given organism within its ecosystem. A niche consist of limited resources such as food, shelter, space, light, desired temperatures, moisture for the organism to survive.
Two or more species of organisms may have similar basic needs and occupy the same niche. When different species population occupy the same niche, they compete for these limited natural resources.
Competition occurs when 2 or more organisms or populations in a community rely or need similar limiting resources.
When plates move toward each other at oceanic-oceanic or oceanic-continental convergent boundaries, the process of subduction generally takes place. This takes place as one plate sinks under another plate, down into Earth's mantle.
The general area where this process is occurring is known as a subduction zone. As the descending plate bends downward, a long, steep, narrow depression in the seafloor where one plate sinks under another plate may develop; this is called an oceanic trench. These features result in some of the deepest parts of the seafloor.