Ques:Q: What do ranchers fear will happen if wolves return? Read this paragraph and choose the correct option from the provided answers: Choices: - loss of environment - human predation - vegetation predation - livestock predation A:

Ans:livestock predation
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Ques:Q: What evolutionary process does not favor altruistic behavior that causes the death of the altruist? Read this paragraph and choose the correct option from the provided answers: Choices: - flow selection - characteristic selection - random selection - natural selection A:

Ans:natural selection
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Ques:Q: What kind of hormones are derived from cholesterol? Read this paragraph and choose the correct option from the provided answers: 17.2 Hormones Hormones are derived from amino acids or lipids. Amine hormones originate from the amino acids tryptophan or tyrosine. Larger amino acid hormones include peptides and protein hormones. Steroid hormones are derived from cholesterol. Steroid hormones and thyroid hormone are lipid soluble. All other amino acidderived hormones are water soluble. Hydrophobic hormones are able to diffuse through the membrane and interact with an intracellular receptor. In contrast, hydrophilic hormones must interact with cell membrane receptors. These are typically associated with a G protein, which becomes activated when the hormone binds the receptor. This initiates a signaling cascade that involves a second messenger, such as cyclic adenosine monophosphate (cAMP). Second messenger systems greatly amplify the hormone signal, creating a broader, more efficient, and faster response. Hormones are released upon stimulation that is of either chemical or neural origin. Regulation of hormone release is primarily achieved through negative feedback. Various stimuli may cause the release of hormones, but there are three major types. Humoral stimuli are changes in ion or nutrient levels in the blood. Hormonal stimuli are changes in hormone levels that initiate or inhibit the secretion of another hormone. Finally, a neural stimulus occurs when a nerve impulse prompts the secretion or inhibition of a hormone. Choices: - germs - Antibiotic - synthesis - steroid A:

Ans:steroid
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Ques:Q: What is produced when an egg is fertilized by a sperm in a fallopian tube? Read this paragraph and choose the correct option from the provided answers: Fertilization of an egg by a sperm in a fallopian tube produces a zygote. The zygote develops into a blastocyst, which implants in the uterus. The offspring then goes through the embryonic and fetal stages. The placenta supports the needs of the developing embryo and fetus. Birth generally occurs at about 38 months after fertilization. Choices: - uterus - fetus - ovaries - zygote A:

Ans:
zygote
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