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Questions in biology

[Done] Adaptations to which organ system in plants would help a short plant survive in areas with limited sunlight? A. Broad leaf surfaces B. Brightly colored flowers C. Thick stems D. Shallow roots

[Done] Which phrase best describes cellular respiration? A. The process where energy from food is used by the cell B. The process where water molecules move across a membrane C. The process by which the cytoplasm physically divides D. The process where molecules' movements balance out their distribution

[Done] _______________ occurs when sensory receptor cells detect a stimulus and then convert it into a neural impulse that transmits that message to the brain. a. Accommodation b. Transduction c. Convergence d. Diffusion e. Calibration

[Done] Which term describes the example below? A child with no freckles has a mother who has freckles and is heterozygous and a father who has no freckles and is homozygous recessive. A. homozygous dominant B. homozygous recessive C. heterozygous D. Female E. Male

[Done] Which of the following must happen before the cell can go through mitosis? A. The cytoplasm must divide. B. The cell must copy its DNA. C. The spindle fibers must break down. D. The sister chromatids must separate.

[Done] Which is a major function of diffusion in cells? A. To produce proteins B. To carry out mitosis C. To convert food into energy D. To get rid of waste material

[Done] How are the circulatory systems in animals and plants alike? A. All plants and animals have a heart. B. Their circulatory systems move blood throughout the organism. C. Their circulatory systems transport nutrients to cells. D. Both plants and animals have a pulmonary circuit.

[Done] If an Arctic polar bear is transferred to a zoo in tropical Singapore, it will not be able to survive. What could be the reason for this? A. Tolerance only for cold climates B. Inability to find a partner for mating C. Injuries during transportation

[Done] Which of these examples describes a pioneer species that is starting primary succession? A. Ferns growing at the base of trees in a forest after a fire B. Grass growing on a newly formed dune C. Primroses growing in a new garden

[Done] In the Meselson-Stahl experiment, bacteria were grown in a medium containing \(^{15}\text{N}\) and were then transferred to a medium containing \(^{14}\text{N}\). After three rounds of DNA replication in \(^{14}\text{N}\), how many bands would you expect?