The 3 main organs in the excretory system are the kidneys, skin and liver.

1. True

2. False

Where in the male reproductive system would you expect to find the most mature spermatozoa? a. in the head of the epididymis b. in the ductus deferens and ejaculatory duct c. in the seminal gland d. in the prostate gland e.

In designing your vaccine, you will need to choose an antigen or antigens to stimulate the adaptive response. All antigens are not created equal--there are certain characteristics that make more effective antigens.

Which is NOT a valid reason why species diversity is economical to humans? A) A diverse set of microbes in waterways can eliminate more pollutants, saving humans the cost of clean up.

Before you dive into DNA analysis, do a bit of online research to learn more. Check out sites that focus on explaining more about how real forensic DNA labs work.

Which piece of bubble gum blows the biggest bubble?

The full moon always rises at sunset and sets at sunrise. True False

Test your knowledge about the specific functions of the five types of white blood cells 1. Release histamine, which promotes inflammation. 2. The cytoplasm is a thin ring around the nucleus. 3.

Which could decrease the human carrying capacity? Question 1 options: corrupt governments energy crisis epidemic disease unequally distributed resources

Explain how a trait might seem to "disappear" for a generation, and then "reappear" in the following generation

What neurotransmitter is released by the axon of a sympathetic preganglionic neuron to communicate with the sympathetic postganglionic neuron?