13. A normal human gestational period lasts forty weeks. Which of the following explains why the eighth week of gestation (length of pregnancy) is notable?

Legumes, a type of plant, require rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. rhizobia use the legumes for food. what would most likely happen to the legume population if rhizobia suddenly became extinct?

Based on the law of dominance, we would expect percent of the offspring from this cross to have large teeth.

What is the next step in muscle contraction after the actin changes shape? (apex)