What would happen without excretory systems in humans?

A) Wastes would build up in blood and damage the body.

B) Blood would not circulate through the body.

C) Oxygen would not enter the blood stream.

D) Nutrients would not be absorbed.

Geographic isolation may result in A. extinction B. speciation

What was a major source of controversy for President Andrew Jackson? his support of expanded voting rights the Indian Removal Act and the Trail of Tears his upbringing west of the Appalachians his appeal to the public during his campaign

In what instances might punctuated equilibrium occur? A) when the environment is unusually humid B) when the environment is rapidly changing C) when the environment is generally stable D) when the environment experiences gradual change overlong

What is used to treat wastewater before returning it to the environment?

At each level of the food chain, what happens to about 90% of the energy? A) gained as energy B) lost as heat C) converted into unusable compounds D) excreted as waste

populations around the globe. If you were a scientist studying this fungus and wanted to know if it could infect a new frog species, how would you conduct your experiment?

Pregnancy comes with a unique set of diet and lifestyle guidelines. Some substances are particularly beneficial for the mother or baby, others are harmful, and some should be used with caution. Drag the appropriate items to their respective bins.

This type of galaxy gets its name from its characteristic oval shape

How are embryonic stem cells different from adult stem cells?

Explain what typically marks the beginning and end of any division of time on the geologic time scale?