Answer the following question given this paragraph: The cytoskeleton is a cellular "scaffolding" or "skeleton" that crisscrosses the cytoplasm. All eukaryotic cells have a cytoskeleton, and recent research has shown that prokaryotic cells also have a cytoskeleton. The eukaryotic cytoskeleton is made up of a network of long, thin protein fibers and has many functions. It helps to maintain cell shape, holds organelles in place, and for some cells, it enables cell movement. The cytoskeleton plays important roles in both the intracellular movement of substances and in cell division. Certain proteins act like a path that vesicles and organelles move along within the cell. The threadlike proteins that make up the cytoskeleton continually rebuild to adapt to the cell's constantly changing needs. Three main kinds of cytoskeleton fibers are microtubules, intermediate filaments, and microfilaments. Q: The cytoskeleton is a cellular "scaffolding" or "skeleton" that crisscrosses what? Choices: - golgi apparatus - cerebellum - cell membrane - cytoplasm A:
cytoplasm
(Question)
Answer the following question given this paragraph: A virus cannot reproduce on its own. However, a virus can reproduce by infecting the cell of a living host. Inside the host cell, the virus uses the cell's structures, materials, and energy to make copies of itself. Q: What can reproduce by infecting the cell of a living host? Choices: - bacteria - mucus - carcinogens - virus A:
(Answer)
virus
Ques: Answer the following question given this paragraph: Linnaeus classified organisms based on obvious physical traits. Basically, organisms were grouped together if they looked alike. After Darwin published his theory of evolution in the 1800s (discussed in the following chapter), scientists looked for a way to classify organisms that showed phylogeny. Phylogeny is the evolutionary history of a group of related organisms. It is represented by a phylogenetic tree , like the one in Figure below . Q: Which scientist was responsible for the theory of evolution by natural selection? Choices: - stephen hawking - galileo Galilei - albert einstein - charles darwin A:
Ans: charles darwin
(Q).
Answer the following question given this paragraph: Solution The charges, as well as the atoms, must balance in reactions. The silver atom is being oxidized from the 0 oxidation state to the 1+ state. Whenever something loses electrons, something must also gain electrons (be reduced) to balance the equation. Oxygen is a good oxidizing agent for these reactions because it can gain electrons to go from the 0 oxidation state to the 2 state. Q: When something loses electrons, it must also? Choices: - reduce protons - slow down - gain protons - gain electrons A:
(A).
gain electrons
Ques:Answer the following question given this paragraph: The mother's mammary glands go through changes during the third trimester to prepare for lactation and breastfeeding. When the baby begins suckling at the breast, signals are sent to the hypothalamus causing the release of prolactin from the anterior pituitary. Prolactin causes the mammary glands to produce milk. Oxytocin is also released, promoting the release of the milk. The milk contains nutrients for the baby's development and growth as well as immunoglobulins to protect the child from bacterial and viral infections. Q: Human mammary glands can produce what substance, which can be used to feed children? Choices: - edema - urea - sperm - milk A:

Ans:milk
Ques:Answer the following question given this paragraph: Q: Upon reaching the postsynaptic membrane, what type of chemical messenger binds to and activates a specific receptor? Choices: - hormone - neuropeptide - pheromone - neurotransmitter A:

Ans:
neurotransmitter