Question

1. how would the presence of cilia, flagella, and pseudopods improve the chances of survival of a unicellular protist?

a. by decreasing the rate of cell division
b. by increasing the rate of water exchange
c. by decreasing the energy needs of the organism
d. by increasing the likelihood of obtaining nutrients

1. which example best demonstrates an organism’s interaction with the environment affecting gene expression?

a. a monkey learning to use a twig to capture termites for food
b. a fox producing more offspring when prey are readily available
c. a fish entering saltier waters and producing glands to remove excess salt
d. a person with high blood pressure maintaining normal pressure levels throug
diet and exercise

1. the model shows differentiation of

stem cells with activated genes (+) and
repressed genes (-) for three different
cell types. which statement best
explains the model?
a. all cells with the same active
gene are identical to one
another.
b. the cells with the same
repressed gene will be identical
to one another.
c. as the stem cell is differentiating, the genes will activate one at a time to
produce a new cell.
d. as different genes are activated or repressed, a cell will form with different
characteristics.

1. which statement best explains why animals are considered heterotrophic?

a. they are able to produce food through the process of photosynthesis.
b. they are able to produce food through the process of respiration.
c. they are able to obtain nutrients by decomposing plant and animal tissue.
d. they are able to obtain nutrients by consuming other organisms or their
products.

1. which action does not demonstrate resource conservation?

a. using paper plates
b. collecting rainwater
c. using a reusable water bottle
d. turning off electric devices when not in use
open response: monarch butterflies have adapted physical features to mimic the
viceroy butterfly. the viceroy is poisonous to predators but the monarch is not. why is
this adaptation considered an advantage to the monarch?

Explanation:

1. Cilia, flagella, and pseudopods allow protists to move through their environment to locate and reach food sources, increasing nutrient acquisition.
2. The fish's environmental change triggers gene expression to produce salt glands to maintain homeostasis, directly linking environment to gene expression changes.
3. The model shows that each specialized cell has a unique combination of activated (+) and repressed (-) genes that create its distinct structure and function.
4. Heterotrophs cannot produce their own food, so animals must consume other organisms or their byproducts for nutrients.
5. Paper plates are single-use disposable items that waste natural resources instead of reusing or conserving materials.
6. Predators learn to avoid the toxic Viceroy butterfly. Because Monarchs mimic the Viceroy's appearance, predators will avoid Monarchs as well, reducing predation risk for Monarchs.

Answer:

1. d. by increasing the likelihood of obtaining nutrients
2. c. a fish entering saltier waters and producing glands to remove excess salt
3. d. As different genes are activated or repressed, a cell will form with different characteristics.
4. d. They are able to obtain nutrients by consuming other organisms or their products.
5. a. using paper plates
6. Predators avoid the poisonous Viceroy butterfly, so they will also avoid the lookalike Monarch, lowering the Monarch's chance of being eaten and improving its survival odds.