Q: Kangaroos, koalas, and opossums are examples of what type of mammals? Read this paragraph and choose the correct option from the provided answers: By giving birth to tiny embryos, marsupial mothers are at less risk. However, the tiny newborn marsupial may be less likely to survive than a newborn placental mammal. The marsupial embryo completes its growth and development outside the mother's body in a pouch. It gets milk by sucking on a nipple in the pouch. There are very few living species of marsupials. They include kangaroos, koalas, and opossums. You can see a baby koala peeking out of its mother's pouch in Figure below . Choices: - carnivorous - cephalopods - monotremes - marsupials A:
marsupials

Q: What are the proteins called that speed up biochemical reactions in cells? Read this paragraph and choose the correct option from the provided answers: Enzymes are proteins that speed up biochemical reactions in cells. Antibodies are proteins that target pathogens for destruction. Choices: - peptides - hormones - carbohydrates - enzymes A:
enzymes

Q: Q: Most lipids in your diet should be what type, found mainly in plant sources and also in fish? Read this paragraph and choose the correct option from the provided answers: Unsaturated fats are found mainly in plant foods, such as vegetable oil, olive oil, and nuts. Unsaturated lipids are also found in fish, such as salmon. Unsaturated lipids are needed in small amounts for good health. Most lipids in your diet should be unsaturated. Choices: - fat - aromatic - saturated - unsaturated A:
A: unsaturated

Question: Q: Thousands of receptor cells that detect the sex attractant equip each filament of what structure? Read this paragraph and choose the correct option from the provided answers: Choices: - optic nerve - flagella - molecule - antenna A:
Answer: antenna

*Question*
Q: What causes the endometrium to thicken during a menstrual cycle? Read this paragraph and choose the correct option from the provided answers: Hormone levels during the follicular phase, ovulation, and the luteal phase are compared. During the follicular phase, LH and FSH secreted from the pituitary stimulate several follicles to grow. The follicles produce low levels of estradiol that inhibit GnRH secretion by the hypothalamus, keeping LH and FSH levels low. Low levels of estradiol also cause the endometrial arteries to constrict, resulting in menstruation. During the time leading up to ovulation, LH and FSH stimulate maturation of one of the follicles. The growing follicle begins to produce high levels of estradiol, which stimulates GnRH secretion by the hypothalamus. As a result, LH and FSH levels rise, resulting in ovulation about a day later. Estradiol also causes the endometrium to thicken. After ovulation, the ovarian cycle enters the luteal phase. LH from the pituitary stimulates growth of the corpus luteum from the ruptured follicle. The corpus luteum secretes estradiol and progesterone that block GnRH production by the hypothalamus and LH and FSH production by the pituitary. Estradiol and progesterone also cause the endometrium to further develop. Figure 43.15 The ovarian and menstrual cycles of female reproduction are regulated by hormones produced by the hypothalamus, pituitary, and ovaries. Choices: - testosterone - blood - ovulation - estradiol A:
**Answer**
estradiol

(Q).
Q: When the body goes into survival mode, it's first priority is to produce enough of which substance for the brain? Read this paragraph and choose the correct option from the provided answers: Starvation When the body is deprived of nourishment for an extended period of time, it goes into "survival mode. " The first priority for survival is to provide enough glucose or fuel for the brain. The second priority is the conservation of amino acids for proteins. Therefore, the body uses ketones to satisfy the energy needs of the brain and other glucose-dependent organs, and to maintain proteins in the cells (see Figure 24.2). Because glucose levels are very low during starvation, glycolysis will shut off in cells that can use alternative fuels. For example, muscles will switch from using glucose to fatty acids as fuel. Choices: - blood - insulin - plasma - glucose A:
(A).
glucose