Author Question: Mammals in the __________ group reproduce without a placenta. a. prototheria b. eutheria c. ... (Read 63 times)

xclash

  • Hero Member
  • *****
  • Posts: 681
Mammals in the __________ group reproduce without a placenta.
 
  a. prototheria
  b. eutheria
  c. metatheria
  d. all of these

Question 2

About __________ mammal species exist today.
 
  a. 400
  b. 2,000
  c. 4,000
  d. 200



bigcheese9

  • Sr. Member
  • ****
  • Posts: 333
Answer to Question 1

Answer c

Answer to Question 2

Answer c



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.

Did you know?

Only one in 10 cancer deaths is caused by the primary tumor. The vast majority of cancer mortality is caused by cells breaking away from the main tumor and metastasizing to other parts of the body, such as the brain, bones, or liver.

Did you know?

Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.

For a complete list of videos, visit our video library