Students planned investigations related to the impact of human actions on organisms and communities. What scientific question could the students investigate to learn more about the impact of the use of fossil fuels on organisms?
a) how does DDT affect the hatching rate of bird's eggs
b) how does acid rain impact the germination of seeds
c) how does an animal's position in a food web affect the concentration of pesticides in its body
d) how does the building of new homes affect habitats
Ans: b) how does acid rain impact the germination of seeds
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If Mendel based his data only on two traits, and the genes influencing those traits were linked and located close together on the same chromosome, which of his laws would he not have been able to resolve?
Comments: The law of segregation applies to traits influenced by single genes. The law of Independent Assortment applies to two or more traits that are influenced by genes on different chromosomes (or very far apart on the same chromosome.) A. the law of segregation B. the law of independent assortment
A fruit is a matured or ripened ovary
Indicate whether the statement is true or false.
In lab, you are shown a freshly cut woody stem. Covering the stem are several cell layers, including cork, living parenchyma, and the cork cambium. These layers replace the function of a single epidermis layer that would be found in immature stems and nonwoody stems that don't have secondary growth. This collection of cell layers is the
A. endoderm. B. periderm. C. mesoderm. D. pachyderm. E. ectoderm.
________ stochasticity is the random variation in birth and death rates that occurs in populations from year to year
Fill in the blank(s) with correct word