Some animals, like birds, reproduce by fusion of cells. Before a bird hatches, what protects the bird as it develops?

Which of the following interprets impulses from the eyes and then directs the body's response? cerebrum cerebellum brain stem hypothalamus

an unfertilized egg cell has 6 chromosomes. after fertilization, how many chromosomes should the zygote have?

Conservationists establish that the minimal viable population of a population of tigers in an extensive area is 16. The current population of tigers is 10. What is likely to happen to the population of tigers?

What determines the identity of an atom?

Which of the following does not influence the time necessary for a nerve impulse to be transmitted? A) length of the axonB) presence or absence of a myelin sheathC) diameter of the axonD) presence or absence of nodesE) whether or not the impulse

How many kilometers has the left side of the pacific basin spread in 2 million years

What is the role of beta phenylethyl alcohol in pea and how does it work?

Drag the correct description under each cell structure to identify the role it plays in the cell. converts chemical fuel into packets of chemical energy (atp) that can power the cell strong, protective structure made from cellulose fibrils makes

What is the 3rd trophic level called

Roberto is a teenager who is going out with friends to a movie. On the way back home, they decide to stop to grab some food. Roberto is health conscious. What kind of snack would you suggest? A. low protein B. calcium rich C. high calorie D.