For a human baby to be born a boy he must receive

a. an X chromosome from the father.

b. a Y chromosome from the mother.

c. a Y chromosome from the father.

d. both an X and a Y chromosome from the father.

Which of the following are functions of the urinary system? 1. Vitamin D synthesis 2. Excretion 3. Regulation of red blood cell synthesis 4. Regulation of the concentration of solutes in the blood 5. Regulation of blood volume and pressure 6.

How are osmosis and diffusion alike? Both move molecules from areas of high concentration to areas of low concentration. Both processes occur through permeable bilayer membranes. Both require additional energy provided by channel proteins.

What characteristic do all angiosperms have in common?

Which phrase best defines erosion? A. layering bits of rocks and soil B. cementing layers of rock together to form stone C. breaking up rocks into smaller pieces D. moving bits of rock and soil from one place to another

How many kinds of tissue are found in the human body? a. one. c. four. b. three. d. five.

Which spinal region lacks autonomic preganglionic neurons?

Which of the following is true about feedlots? A. Meat and dairy products that come from feedlot livestock are usually cheaper than other meat and dairy products. B. Livestock in feedlots usually graze on grass and are not allowed to eat grains. C.

According to the modern atomic model, electrons in an atom are always moving?

Asexual reproduction in which a single cell divides into two with no exchange of genetic material reproduction method of bacteria

When discussing population features a cohort is described as question 6 options: a all individuals living in the same habitat. b all the different species in a community. c all the organisms interacting in the ecosystem.