Gus drew a diagram to compare marsupial and placental mammals which label belongs in the area marked Y?

a) have a two-week gestation period

b) young develop inside body

c) sometimes lay eggs

d) are endotherms

please help fast, thank you!

A

Explanation:

what have scientists found to be the most efficient and effective way to insert new sequences into an individual? a-scientists have created genetically altered foods that release dna during digestion. b-scientists use viruses to insert specific gene sequences. c-scientists irradiate genes so that they can be absorbed through the skin.