Question

1. key deer are found on the islands of the florida keys and feed on the native trees. which is most likely to happen to populations of key deer if the forests are cleared where they live?

a. their populations will increase because of an increase in open space.
b. their populations will decrease because of a decrease in usable habitat.
c. their populations will move to the mainland and disappear from the islands.
d. their populations will adapt to the new habitat and they will become a new species.

1. what will most likely occur if the population of the world continues to increase at predicted rates?

a. there will be an increase in biodiversity as a result of improvements in technology.
b. there will be more rapid depletion of natural resources.
c. the human race will rapidly become extinct.
d. all human diseases will be eliminated.

1. deer provide food for wolves. how does this relationship also benefit the deer herd?

a. by protecting deer from other predators
b. by controlling the deer population
c. by decreasing diversity within the herd
d. by protecting the deer from disease

1. the diagram shows a phylogenetic tree. in which phylum do organisms have a segmented body?

a. chordata
b. echinodermata
c. hemichordata
d. nematoda
open response: tapeworms are parasites that can infect mammals. tapeworms have no digestive tracts of their own. tapeworms attach themselves to the intestine wall and reproduce. explain why tapeworms are classified as parasites. relate the lack of a digestive tract in tapeworms to their parasitic behavior.

Explanation:

1. Key deer rely on the forest for food and habitat. Clearing the forest removes their primary resources, so their population will shrink.
2. A growing human population increases demand for food, water, fuel, and land, accelerating natural resource depletion.
3. Wolves prey on weaker, sick, or old deer, which controls the deer population to a sustainable size that does not overgraze the available food supply, benefiting the overall herd health.
4. Chordata includes vertebrates (like mammals, fish, birds) which have segmented bodies (segmented muscle blocks, vertebrae). The other listed phyla do not have true segmented body plans as a defining trait.
5. Tapeworms are parasites because they live on/in a host mammal, steal nutrients from the host's digested food without providing any benefit to the host, harming the host over time. They lack their own digestive tract because they absorb pre-digested nutrients directly through their skin from the host's intestinal lumen, which is perfectly adapted to their parasitic lifestyle.

Answer:

1. b. Their populations will decrease because of a decrease in usable habitat.
2. b. There will be more rapid depletion of natural resources.
3. b. by controlling the deer population
4. a. Chordata
5. Tapeworms are parasites as they live in host intestines, stealing nutrients to harm hosts. They lack their own digestive tract because they directly absorb pre-digested nutrients from the host gut, matching their parasitic lifestyle.