Answer the following question given this paragraph: There are 44 autosomes and 2 sex chromosomes in the human genome, for a total of 46 chromosomes (23 pairs). Sex chromosomes specify an organism's genetic sex. Humans can have two different sex chromosomes, one called X and the other Y. Normal females possess two X chromosomes and normal males one X and one Y. An autosome is any chromosome other than a sex chromosome. The Figure below shows a representation of the 24 different human chromosomes. Figure below shows a karyotype of the human genome. A karyotype depicts, usually in a photograph, the chromosomal complement of an individual, including the number of chromosomes and any large chromosomal abnormalities. Karyotypes use chromosomes from the metaphase stage of mitosis. Q: Ectotherms undergo a variety of changes at the cellular level to acclimatize to shifts in what? Choices: - density - volume - altitude - temperature A:
temperature
Answer the following question given this paragraph: Q: Nearly all apicomplexans are parasites of what? Choices: - stars - plants - fungi - animals A:
animals
Q: Answer the following question given this paragraph: Capillaries are the smallest type of blood vessels. They connect the smallest arteries (arterioles) and veins (venules). Exchange of substances between cells and the blood takes place across the walls of capillaries, which may be only one cell thick. Q: What is the term for the smallest blood vessels? Choices: - muscles - Aortas - arteries - capillaries A:
A: capillaries
Question: Answer the following question given this paragraph: The most famous mass extinction was 65 million years ago. Between the Mesozoic Era and the Cenozoic Era, about 50% of all animal species died off. This mass extinction is when the dinosaurs became extinct. Most scientists think that the extinction was caused by a giant meteorite that struck Earth. The impact heated the atmosphere until it became as hot as a kitchen oven. Animals roasted. Dust flew into the atmosphere and blocked sunlight for a year or more. This caused a deep freeze and ended photosynthesis. Sulfur from the impact mixed with water in the atmosphere. The result was acid rain. The rain dissolved the shells of the tiny marine plankton that form the base of the food chain. With little food being produced, animals starved. Q: About 50% of all animal species died off between the mesozoic and which other era? Choices: - jurassic - precambrian - cretaceous - cenozoic A:
Answer: cenozoic
*Question*
Answer the following question given this paragraph: Of course, calcium is critical for many other biological processes. It is a second messenger in many signaling pathways, and is essential for muscle contraction, nerve impulse transmission, and blood clotting. Given these roles, it is not surprising that blood calcium levels are tightly regulated by the endocrine system. The organs involved in the regulation are the parathyroid glands. Q: Blood calcium levels are tightly regulated by the what system? Choices: - digestive - cardiovascular - nervous - endocrine A:
**Answer**
endocrine
Answer the following question given this paragraph: The canoe paddles, nutcracker, and hammer that you read about in this lesson have something in common. All three are examples of a type of simple machine called a lever. Q: Canoe paddles, nutcracker, and hammer are examples of what type of simple machine? Choices: - lock - handle - pivot - lever A:
lever