The algal group most like green plants is the:

a. Chlorophyta
b. charophytes
c. brown algae
d. dinoflagellates
e. red algae


b

Biology & Microbiology

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Telomerase activity in stem cells is very low

A. true B. false

Biology & Microbiology

Which of the following is not a function of the kidneys?

A. All of these answer options are functions of the kidneys. B. elimination of toxic compounds C. regulation of water levels in the body D. regulation of electrolyte levels in the body E. regulation of blood pressure

Biology & Microbiology

Don’t be alarmed, but you should be aware that right now, there is a species of mites, Demodex folliculorum, living in your eyelashes that are adapted to live on human skin and in human hair follicles, and nowhere else in nature. The good news is that these almost never cause any problems for their human hosts, and most are never even aware that they exist. What type of relationship do your eyelash mites share with you?

a. competitive b. mutualistic c. commensal d. parasitic

Biology & Microbiology

Your first candidate for a regression to identify the effect of X1 on Y is: Yi = ?0 + ?1X1i + ?2X2i + Ui, where X2 is a control variable. Suppose a member of your consulting team suggests to you that another variable Ri should be a control that is also included in your regression, in order for you not to be worried about the endogeneity problem. What condition could you credibly test using data on Y, X1, X2, and R which could justify the inclusion of Ri as a control in your regression?

A. spcorr(Ri, Yi (Xi1, Xi2)) ? 0 B. Ri is exogenous. C. Ri has a strong correlation with X2. D. Ri has no effect per se on Yi.

Biology & Microbiology