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Questions in biology

[Done] All living things are either Eukarya, Bacteria, or Archaea. These three broadest categories in the classification of life are called _______.

[Done] Which of the following occurs during anaphase I of meiosis? A. Formation of tetrads B. Separation of homologous chromosomes C. Crossing over D. Separation of sister chromatids, with one chromatid pulled toward each pole E. Assembly of chromosomes along the equatorial plane

[Done] The amount of energy entering a food chain depends on the: A. direction of energy flow in the system B. efficiency of energy recycling in the system C. biomass of carnivores and their efficiency in locating and capturing animal prey D. biomass of heterotrophs and their efficiency in transforming plant tissue into animal tissue E. biomass of autotrophs and their efficiency in transforming solar energy into chemical energy

[Done] If two people are pulling against each other with forces of 500 Newtons and 600 Newtons, there is a/an: A. Balanced force B. Unbalanced force C. Universal gravitation

[Done] What is an example of mutualism in the tropical rainforest?

[Done] If all three populations were mixed together and placed at 37°C, which of the following would be most likely to happen? A. Only the population evolved at 25°C would die and become extinct. B. Only the population evolved at 35°C would survive and reproduce. C. All the bacteria would die and the populations would become extinct. D. All populations would grow, and transfer of genes would create one common population. E. It cannot be determined from the information given.

[Done] An example of a deposit feeder is __________. A. a squid B. a clam C. a polychaete D. an earthworm

[Done] The offspring of most sexually reproducing organisms have two copies of each gene. One came from each what?

[Done] Which population has the highest fitness at 25°C? A. The population evolved at 25°C. B. The population evolved at 30°C. C. The population evolved at 35°C. D. All populations are equally fit at this temperature. E. It cannot be determined from the information given.

[Done] The euglena possesses an organelle that synthesizes a polysaccharide for storage. This organelle is the (A) stigma (B) pyrenoid (C) eyespot (D) cytopharynx (E) oral groove