Answer: Joints and faults are types of fractures. A joint is a fracture along which no movement has taken place, usually caused by tensional forces. A fault is a fracture or break in the rock along which movement has taken place. One might expect more earthquakes to occur near faults.
Explanation:
Reproductive isolation is the separation of species populations on the basis of behavior, geography or time. According to the given information statement ii, i.e., one population breeds in late spring and one in late summer and statement iv, i.e., singing by male of first population than other ones shows evidence that two populations are likely experiencing reproductive isolation and genetic exchange.
<h3>What is genetic exchange?</h3>
New genotype of species are formed through the process of genetic exchange.
Reproductive isolation for example, is in changes of bird song from different species of finch. Females of one species of finch are unable to recognize the bird song of males. This is a barrier that is pre-zygotic.
Another includes one population breeds in late spring and one in late summer and singing by male of first population than other.
Thus, the correct statements are ii and iv so the correct option will be D.
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Answer:
b) It is a circular molecule.
Explanation:
a) It contains histones. That is a feature on eukaryotic chromosomes.
b) It is a circular molecule. That is a feature on prokaryotic chromosomes.
c) It contains A, C, G, and T. That is a characteristic of both eukaryotic and prokaryotic chromosomes.
d) It contains double-stranded DNA. That is a characteristic of both eukaryotic and prokaryotic chromosomes.
Answer:
d. secondary endosymbiosis.
Explanation:
- When a living cell acquires another organism that eventually becomes a part of this cell, this process is known as primary endosymbiosis.
- When an organism that has already undergone primary endosymbiosis engulfs another eukaryotic organism then this process is known as secondary endosymbiosis.
- Secondary endosymbiosis has been known to occur in plastids because of which they are surrounded by two membranes. This bilayer is present because one of the layers is the original outer membrane of the organism and the other membrane is that of the organism that has been engulfed.
