What is an example of an adaptation? Question 1 options:

a)

A long strawlike mouth

b)

Blending in

c)

Making waves along their bellies

d)

Anything that improves an organism's chances for survival

Question 2 (1 point)
Which is NOT a structural adaptation

Question 2 options:

a)

Spiky coating of a porcupine

b)

Possums playing dead

c)

Sharp teeth of a tiger

d)

Length of a giraffe's neck

Question 3 (1 point)
What does endangered mean?

Question 3 options:

a)

all of the member of the species have died out

b)

danger to other species

c)

when there are not many members of a species left

d)

a new kind of animal

Question 4 (1 point)
Which change is an environmental effect of deforestation?

Question 4 options:

a)

temperature decrease

b)

poisoning wildlife

c)

soil erosion

d)

water temperature increase

Question 5 (1 point)
Which change is an example of an environment changing slowly?

Question 5 options:

a)

pond succession

b)

hurricane

c)

fire

d)

tornado

The kidney filters potentially toxic substances in the blood, and thus “clears” the blood of those substances. this clearance function is dependent upon and proportional to the diffusion gradient of the substance across filtering capillaries, i.e. if the concentration of the substance is doubled, twice as much will be cleared from each ml of blood that is filtered. suppose that the body produces a constant amount of a substance x per unit of time. the kidneys eliminate substance x at a rate directly proportional to the concentration of the substance and the volume of blood cleared each minute (c): elimination = c × [x], where [x] is the steady-state concentration of substance x. imagine an individual with an initial concentration of x equal to [x]0 who develops kidney disease. her baseline clearance c0 drops to one half of the original (½c0). what is the new steady state concentration of x? (for simplicity, assume that substance x is 100% filtered by the kidney).

Which statement is true for bacteria a. bacteria have complex internal structures b. all bacteria are spiral in shape c. all bacteria cause disease in animals d. bacteria break down some foods

Which describes the habitat of a frog?