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Questions in biology

[Free] Human impact on one system leads to changes in more of Earth’s systems. True or False?

[Free] Jeremy wears his baseball cap backward because he noticed his older brother does so. This illustrates the importance of: A. Peer influence B. Role modeling C. Personal style D. Individualism

[Free] In the interaction between wolves and moose, wolves prey on moose, thereby reducing their population. Later, the wolf population decreases as fewer moose are available to feed upon, thereby leading to a rise in the moose population. What does this example illustrate? A. Predation can affect population size B. Competition can affect population size C. Parasitism can limit the growth of a population

[Free] Why is a hen egg considered a cell?

[Free] Name four things attached to the central carbon in all amino acids.

[Free] How are photosynthesis and cellular respiration related? A. Energy is continuously cycled between the two processes. B. They each occur in completely different organisms. C. Both depend on ATP as a source of energy. D. Materials produced in one process are used in the other. Which of the following events represents a disruption in access to the energy source needed by an organism? A. A weed is uprooted from the soil. B. Oxygen is removed from the water in a fish's bowl. C. A cactus is moved from a sunny windowsill to a dark room. D. The water bowl is removed from a hamster's cage.

[Free] Which is an example of an organism? A. Soil B. Iceberg C. Mold D. A molehill

[Free] Why is pepsin used in washing powder?

[Free] Which is the best example of the concept of heredity? A. A black cat blends into its environment at night. B. A baby has his mother's hair and eye color. C. As a barnacle grows, it gets calcium for its shell from seawater. D. The sunflower will move so its flower head is always facing the sun.

[Free] Which statement best explains why meiosis produces haploid cells rather than diploid cells? A. Haploid cells join to form an organism that has half the number of chromosomes as the parent. B. Haploid cells join to form an organism that has a complete set of chromosomes. C. Haploid cells join to form an organism that has double the number of chromosomes as the parent. D. Haploid cells join to form an organism that is genetically identical to the parent.