Complete digestion is less efficient than incomplete digestion because most animals eat too much food.

What components make up the backbone of DNA? a adenine & guanine b cytosine & thymine c phosphate & sugar d nitrogen base & sugar

A plant's response to an external stimulus involves receptors. a receptor that responds to light normally contains

Which of the following would you least likely find living in the chaparral biome?

In which of these organisms does binary fission occur?

HIV frequently mutates and changes its surface antigens, making the development of a vaccine difficult. True False

8. List at least 5 new discoveries about viruses.

The phospholipid molecule has two parts, the polar end and the bipolar end. True or False?

Giraffes use their extremely long necks to reach the lees high up on a case he had trees which other animals can not reach giving them a food source for which they have few competitors what can you conclude about natural selection from this

Which is a reason that many organisms that have existed on earth have left no fossils?

Are all organisms with similar physical characteristics related to one another? If not, why?