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Questions in biology

[Answered] If two parents that are heterozygous (Aa) at a single locus give rise to offspring that are 25 percent AA, 50 percent Aa, and 25 percent aa, then all of the following are true EXCEPT: A. The parents are diploid organisms. B. The a allele is recessive lethal. C. The alleles assort independently. D. The gametes combine at random. E. The probability that a given gamete will receive allele A is one-half.

[Answered] What are two types of selective breeding, and how do they compare?

[Answered] What can you compare a chloroplast to?

[Answered] These words were written by Robert Hooke in 1665. The pores or cells that Hooke described were really __________.

[Answered] A researcher states that bone density in women is negatively associated with age. This means: A. Above average values of age tend to accompany below average values of bone density. B. Above average values of age tend to accompany above average values of bone density. C. Below average values of age tend to accompany below average values of bone density. D. Older women aren't any more likely than younger women to have below average bone density.

[Answered] The biosphere is best described as the regions of Earth that support _______. A. plant life B. animal life C. all life D. human life

[Answered] We usually eat the flesh of fruit and dispose of the peel. Which tissue do we eat and which tissue do we discard? A. Eat epidermis and discard parenchyma B. Eat parenchyma and discard epidermis C. Eat parenchyma and discard sclerenchyma

[Answered] Compare biotic and abiotic factors.

[Answered] What change will a pebble usually undergo when it is transported a great distance by streams?

[Answered] Peter and Rosemary Grant: A. Spent more than 30 years studying Darwin’s tortoises. B. Studied the migration of the camel. C. Actually observed evolution by natural selection taking place. D. All of the above.