Why do animals have adaptations?

A. There is competition for the same food sources.

B. Ecosystems can change.

C. Special body parts and behaviors are needed for survival.

D. all of the above

Which aspect is an example of structural adaptation? -octopuses ability to squirt ink -skin tanning in humans -stronger kidneys in kangaroos rats -bill lengths of carnivores -venom of snakes

True or faulse, when air or water is heated, its density increases, and the air or water rises?

What are the major organs of the urinary system?

Number the steps in the correct order of building a preotein

In non-regenerating tissues or in extremely severe wounds, what is the main disadvantage of the scar tissue that replaces the lost tissue?

The evolution of populations due to chance isa) genetic drift. b. has more effect in large populations than in small populations. c. gene flow. d. natural selection. e. genetic variation.

When you first get into the swimming pool the water feels rather cool; but after swimming for a while the water feels fine. a friend asks you how the water is and you tell her the "water's great".

What part of the brain is primarily responsible for monitoring blood glucose levels and causing chemical reactions to spur us to eat when glucose levels are low?

Which cell structure is responsible for controlling what enters the cell? select one: a. cytoplasm b. nuclear membrane c. plasma (cell) membrane d. endoplasmic reticulum

All of the following are functions of the peripheral nervous system except it interprets signals from the external environment it sends signals to the internal organs it receives messages from the central nervous system it sends messages directly to