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Question | Answer |
---|---|
what effect do animals have on the enviroment | they realease cardon dioxide in the atmosphere |
plants alter the chemicals in the air how | they take nitrogen from the air and help with nitrogen fixation |
a puppy chews on objects other than food . this type of behaivor is | innate behavior |
when effective insecticide is used on a population of insects,most of the insects are killed. however,a few may survive due to genes that make the resistant to the insectiside.what is the best explanation of why this occurs? | surviving insects passed on their resistant genes. |
the sperm cells of a squirrel have 20 chromosomes. how many are found in a body cell of the same animal. | 40 chromosomes |
how would a gene be described? | the coded instruction for a trait |