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Questions in biology

[Homework Help] Both photosynthesis and aerobic cellular respiration produce ATP using an electron transport chain. Therefore, both chloroplasts and mitochondria contain: Select one: A. membranous structures B. the electron carrier NADPH C. the electron carrier NADH D. none of the above

[Homework Help] Provide a sentence using the term "fluid mosaic model."

[Homework Help] A pollen tube is essential to the process of pollination because _________________________. Select one: A. it creates pollen B. it allows the male nucleus to reach the female gamete C. bees would not be able to reach pollen without it D. it provides nutrients to a seed

[Homework Help] Hydrogen gas (H₂) and oxygen gas (O₂) react to form liquid hydrogen peroxide (H₂O₂). Which statement is true about the reaction? A. The same atoms are present, so the chemical properties are the same. B. The atoms of the reactants have combined to form a new substance. C. The product that is formed has the same physical properties as the reactants. D. The two gases have mixed together, but a new substance has not formed.

[Homework Help] All organisms, even plants, perform cellular respiration because __________. Select one: A. All organisms need to eat protein B. All organisms need to dispose of NADH C. All organisms need ATP for cell work D. All organisms need oxygen

[Homework Help] Cloning is a process by which: A. Undesirable genes may be eliminated B. An organism that is genetically identical to another is made C. Many identical protein fragments are produced D. A virus and a bacterium may be fused into one

[Homework Help] How do skin cells form different types of tissues? A. Information in the DNA of the nucleus can tell skin cells how to develop and perform special functions, which causes a group of these cells to perform similar functions and become skin. B. Information in the RNA of the nucleus can tell skin tissues how to develop and perform special functions, which causes a group of these cells to perform similar functions and become skin.

[Homework Help] Gymnosperms have small male cones because ______. Select one: A. larger cones would dry out more easily B. pollen is very small and does not require a large cone C. small cones do not block sun as much as larger cones D. larger cones are too heavy

[Homework Help] Oxygen is released as a waste product by plants during the process of photosynthesis.

[Homework Help] Which of the following best illustrates the role that gravity played in the formation of our solar system? A. Gravity allowed the nebula to expand and move outward. B. Gravity caused the nebula to cool enough for planets to form. C. Gravity removed excess gas and dust from the cores of the planets. D. Gravity pulled particles of dust and gas together to form planets.