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Questions in biology

[Done] A ratio of 3:1 in the phenotype of an organism occurs when A. the alleles are incompletely dominant. B. only recessive traits are involved. C. only dominant traits are involved. D. alleles segregate during meiosis. E. crossing over has occurred in Anaphase II.

[Done] When organisms must compete for resources, they will usually have a ____________ distribution. a. uniform b. random c. clumped d. competitive

[Done] A dog gives birth to five puppies. What percentage of its chromosomes does each puppy share with the mother? A. 25% B. 50% C. 75% D. 100%

[Done] Two snails in the same class must also be in the same: A. order B. species C. genus D. family E. phylum

[Done] Students research unicellular, prokaryotic organisms that live in harsh environments such as volcanic hot springs, brine pools, and anaerobic black organic mud. Which of these groups are the students most likely researching? A. Archaebacteria B. Eubacteria C. Plantae D. Protista

[Done] Some organisms living in a vacant lot include grass, dandelions, mice, grasshoppers, and slugs. Collectively, these organisms represent: A. an ecosystem. B. a community. C. a population. D. a mutualism. E. a biome.

[Done] In lactic acid fermentation: A. Carbon dioxide is released. B. Lactic acid is produced. C. NADH is recycled. D. All of the above.

[Done] Fungus-like protists have A. cell walls made of cellulose. B. cell walls made of chitin. C. chloroplasts for photosynthesis. D. none of the above.

[Done] What part of the city has a similar job to the cell membrane?

[Done] Natural selection states that: A. A change in a species occurs over time. B. Nature selects the variations within a species that are most useful for survival. C. Fitness is an organism’s ability to survive and produce fertile offspring. D. All of the above.