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Questions in biology

[Homework Help] Which of the following is true? A. The products of photosynthesis are the reactants of cellular respiration. B. The products of cellular respiration are the reactants of glycolysis. C. The products of cellular respiration are the reactants of photosynthesis. D. A and C are true.

[Homework Help] Using a compound microscope, Jorge is able to see a single-celled organism moving rapidly in the field of view. He can just make out one long, whip-like structure that is undulating back and forth. Jorge has just identified: Select one: a. cilia b. spindle fibers c. a flagellum d. chromosomes

[Homework Help] Sophie says dolphins and sharks look very similar, so they must be related. Jake disagrees, saying DNA evidence has shown that dolphins and other aquatic mammals are actually more closely related to the ancestors of modern hippos. Who is correct using the modern system of classification? A. Jake is correct because classification is based on evolutionary relationships. B. Both are correct because traditional and modern classifications can overlap. C. Neither is correct because neither is taking into account both the traditional and modern classifications.

[Homework Help] Which two cellular structures help cells move around? A. Nuclei and cell walls B. Chloroplasts and endomembrane systems C. Cilia and flagella D. Ribosomes and mitochondria

[Homework Help] What would happen in an ecosystem without decomposers? A. Plant growth would decrease. B. Producers would increase. C. Plant growth would increase. D. Consumers would increase.

[Homework Help] Which is a major difference between the cell membrane and the cell wall? A. Cell membranes are living; cell walls are not living. B. Cell membranes are found in human cells; cell walls are found in all other cells. C. Cell membranes are found in animal and plant cells; cell walls are found only in plant cells. D. Cell membranes are semipermeable; cell walls are selectively permeable.

[Homework Help] Which of the following has the least influence in the modification of plant leaves for photosynthesis? Select one: A. Location of chloroplasts B. Thickness of leaf C. Presence of root hairs D. Amount of surface area

[Homework Help] Which two organs are part of the excretory system? A. Gizzard, beak B. Stomach, esophagus C. Large intestine, small intestine D. Kidney, bladder

[Homework Help] The microscope helped Antoine van Leeuwenhoek discover "little animalcules," which were really the first descriptions of microscopic items such as: A. Bacteria B. All of the above C. Red Blood Cells D. Protozoa and Algae

[Homework Help] How should a microscope be carried?