Why is myelin important?Check all that apply. Check All That Apply It forms extensions called perivascular feet, which contact the blood capillaries and stimulate them to form a tight seal called the blood- brain barrier. It speeds up signal conduction in the nerve fiber. It produces cerebrospinal fluid. It is formed to assist in the regeneration of damaged fibers. It insulates the nerve fiber.

In which allelic relationship(s) can heterozygous individuals have the dominant phenotype? total dominance complete dominance incomplete dominance co-dominance none of the choices are correct

24. List the specialized cells found on the villus epithelium and in the intestina crypts, the major secretion(s) of each cell \& the major role of each secretion.

Fill in the Blank Question The lipoprotein envelope of an influenza virus is covered with $\square $ spikes and contains proteins that form channels for $\square $ transport into the virus.

Which of the following are part of the body's innate immunity? Phagocytes Antibodies T lymphocytes Bacterial cell walls

A eukaryotic cell is unable to manufacture proteins. Which of the following cell parts may be related to this error? Cytosol and DNA DNA and ribosomes Plasma membrane and cytosol Ribosomes and cell membrane

2. What is the main function of the lungs? A. Produce insulin B. Filter blood C. Digest food D. Exchange oxygen and carbon dioxide

__ is also known as the ear drum. Labyrinth equilibrium ) cerumen tympanic membrane

How does nature "select"phenotypes , such as bird beaks?Check all correct explanations. Organisms can choose the genes that will make them most successful. The environment influences which alleles an organism can pass on to its offspring. Traits that suit the environment enable an organism to reproduce in greater numbers. Traits that do not suit an environment make it harder for an organism to stay alive and reproduce.

What nutrient is the non-digestible part of plant food? Protein ) Fat Water Fiber

3. A gradual change from an ancestral type was referred to by Darwin as: Convergent evolution catastrophism Principles of Superposition Descent with modification Uniformitarianism