Answer:
The correct answers are:
Analogous structures do not indicate a common ancestor. Analogous structures have the same function but a different structure. An example of an analogous structure is the wing of a bat and a butterfly.
Explanation:
Analogous structures are the structures that have a similar function in various organisms but their anatomic structure is different from one another in reality. Analogous structures are do not indicate a common ancestor.
An analogous structures example is the wings of the bat and butterfly as they are both used for flying but their structure is different anatomically from one another.
Secretion of human chorionic gonadotropin [HCG] only occur during pregnancy in the placenta. The concentration of this hormone increase rapidly during the first three months of pregnancy; the amount in the blood stream doubles every two to three days as the development of the placenta and embryo progress. The hormone reaches its maximum concentration peak around the sixth week of pregnancy and after this, its concentration decline.
B) short because it has both t alleles and no T alleles
Scientists think that dolphins and whales may have evolved from a common ancestor because they have similar anatomies.
<h3>What is a common ancestor?</h3>
A common means different animals now, have evolved from a single ancestor or animal.
These animals may share common characters and structures.
Whales, dolphins, and porpoises are evolved from a common ancestor; cetacean.
The animals that evolved from cetaceans are all aquatic, primitive cetaceans were amphibians too.
Thus, They have similar anatomies.
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They use them as food and habitats.
