Answer the following question given this paragraph: in color. Golden algae are found in both freshwater and marine environments, where they form a major part of the plankton community. The brown algae are primarily marine, multicellular organisms that are known colloquially as seaweeds. Giant kelps are a type of brown algae. Some brown algae have evolved specialized tissues that resemble terrestrial plants, with root-like holdfasts, stem-like stipes, and leaf-like blades that are capable of photosynthesis. The stipes of giant kelps are enormous, extending in some cases for 60 meters. A variety of algal life cycles exists, but the most complex is alternation of generations, in which both haploid and diploid stages involve multicellularity. Compare this life cycle to that of humans, for instance. Haploid gametes produced by meiosis (sperm and egg) combine in fertilization to generate a diploid zygote that undergoes many rounds of mitosis to produce a multicellular embryo and then a fetus. However, the individual sperm and egg themselves never become multicellular beings. Terrestrial plants also have evolved alternation of generations. In the brown algae genus Laminaria, haploid spores develop into multicellular gametophytes, which produce haploid gametes that combine to produce diploid organisms that then become multicellular organisms with a different structure from the haploid form (Figure 23.19). Certain other organisms perform alternation of generations in which both the haploid and diploid forms look the same. Q: Some marine algae have evolved special structures capable of what plant process? Choices: - pollination - respiration - seed germination - photosynthesis A:
photosynthesis
(Question)
Answer the following question given this paragraph: Q: All three axes are established before the zygote begins to undergo what? Choices: - cloning - birth - twinning - cleavage A:
(Answer)
cleavage
Ques: Answer the following question given this paragraph: Figure 18.19 The shape of the male reproductive organ varies among male damselfly species, and is only compatible with the female of that species. Reproductive organ incompatibility keeps the species reproductively isolated. Q: What keeps various species from mating and reproducing outside their own species? Choices: - digestive system incompatibility - brain organ incompatibility - cancer organ incompatibility - reproductive organ incompatibility A:
Ans: reproductive organ incompatibility
(Q).
Answer the following question given this paragraph: These people may be having fun in the icy water, but their bodies are struggling to react to the cold. For example, they may begin to shiver. Shivering helps the body return to a stable temperature. The body is always working to achieve stability, or homeostasis. Q: Shivering helps the body return to a stable what? Choices: - pH level - weight - mood - temperature A:
(A).
temperature
Ques:Answer the following question given this paragraph: Fossils are a window into the past. They provide clear evidence that evolution has occurred. Scientists who find and study fossils are called paleontologists . How do they use fossils to understand the past? Consider the example of the horse, shown in Figure below . The fossil record shows how the horse evolved. Q: Scientists who find and study fossils are called what? Choices: - biologists - geologists - anthropologist - paleontologists A:

Ans:paleontologists
Ques:Answer the following question given this paragraph: There are many other nervous system diseases. They include multiple sclerosis, Huntington's disease, Parkinson's disease, and Alzheimer's disease. However, these diseases rarely, if ever, occur in young people. Their causes and symptoms are listed below ( Table below ). The diseases have no known cure, but medicines may help control their symptoms. Q: Multiple sclerosis, huntington's disease, parkinson's disease, and alzheimer's disease are example of diseases of which body system? Choices: - muscular system - lymphatic system - circulatory system - nervous system A:

Ans:
nervous system