What is the first step of pregnancy?

A. Differentiation of blastocyst
B. Contraction of a uterus
C. Development of placenta
D. Formation of a zygote

In the family tree below, people with the recessive trait of attached earlobes are shaded gray.

What is the relationship between absorbance of light and the rate of photosynthesis?

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.