Quick bio! k12 !

a bat wing, an alligator leg, and a human arm are homologous structures. how does the presence of homologous structures support one aspect of the theory of evolution?

a. the fact that the bone structures are similar supports the theory that the animals shared a common ancestor.
b. the fact that the bone structures are similar supports the theory that all of the animals evolved from mammals.
c. the fact that the bone structures are completely different supports the theory that those organisms did not share a common ancestor.

an organism new to science was discovered during a recent underwater expedition to the great barrier reef in australia. the organism is multicellular, and its cells contain chloroplasts, a nucleus, and organelles. in which domain would a scientist place this organism?
a. bacteria
b. eukarya
c. archaea
d. animalia

which statement best describes the difference between the life cycles of plants and animals?
a. plants have a one-part life cycle and are entirely haploid; humans have a two-part life cycle, spending part of their life in a diploid phase and part in a haploid phase.
b.
plants have a one-part life cycle and are entirely diploid; humans spend their lives in a haploid phase.
c. plants have a two-part life cycle, spending part of their life in a diploid phase and part in a haploid phase; humans spend their lives in a diploid phase and produce gametes that are haploid.
d. different plants have a different number of phases in their life cycle; humans always have two phases in their life cycle.

what is the function of the human immune system?
a. to defend the body from invading pathogens
b. to regulate the production of hormones within the body
c. to produce red blood cells within bone marrow
d. to regulate enzymes involved in growth and development

plants and animals require energy to live. which statement best describes the difference between the way plants and animals obtain energy?
a. producers such as plants do not require a source of energy; animals must consume food for energy.
b. plants produce glucose that can be broken down by cellular respiration; animals digest foods to obtain glucose for use in cellular respiration.
c. plants produce atp during photosynthesis; animals produce atp during digestion.
d. both plants and animals absorb food from their surroundings.