A typical asteroid has an orbital period around the Sun of 5.2 years. How far from the Sun is this asteroid?
a. 5.2 AU
b. 10.4 AU
c. 27.0 AU
d. 3.0 AU
e. 2.3 AU
d
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A mosquito carrying the malaria parasite (P. falciparum) bites a woman's arm. What structures must the mouth parts of the mosquito pass through to introduce the parasite into the woman's bloodstream? Select all correct choices
A. portions of the epidermis B. keratin-covered cells C. portions of the dermis D. connective tissue
Why is antigenic drift a problem for the immune system?
A. It requires a new, primary response by B cells. B. The ability of MHC to present antigen is affected. C. T cell receptors may not recognize the altered antigen. D. Two answer options are correct: It requires a new, primary response by B cells AND T cells may not recognize the altered antigen.
Sequencing the dog genome is currently a high priority for genomics researchers. What insights do you think can be gained about the evolutionary process by analyzing the genome of dogs?
What will be an ideal response?
Which cells provide flexible support to the growing parts of plants?
A) collenchyma cells B) sieve-tube elements C) sclerenchyma cells D) parenchyma cells