Answer: Layer a is 500 million years old.
Explanation:
Trilobite is a member of the group of extinct arthropods found as fossils and they can be identified by the three-lobed as well as three segmented forms. These were the marine animals. These were appeared initially in the Cambrian Period. They used to live 542 million years ago so the fossils can be estimated to be aged of 500 above years old. These animals used to dominate in the sea area.
Metrology. evolution biology
The corresponding strand would be UACUCGGCACGUUUGACA
Answer: 3.
Explanation:
The concept is based on sexual imprinting which results from selection for recognition of conspecifics.
Sexual imprinting is the mechanism by which a young animal discovers the properties of a desired mate. Male zebra finches, for example, tend to favor mates with the presence of the female bird rearing them, rather than that of the birth parent when they're special.
A female zebra finch select a male that resembels her father with a red feather taped to his head for reprodcution because there are sufficient opportunity of sexual imprinting.
Hence, the correct option is 3.
OK my friend basically pleiotropy would be when one gene affects multiple traits so the answer will be option D.
