Density-dependent factors that affect the growth of a population would including which of the following?

a. volcanoes
b. hurricanes
c. disease
d. floods


c. disease

Biology & Microbiology

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If you were to replace the phosphate group of a phospholipid with a fatty acid chain, you would have  

A.  glycerol. B.  a triglyceride. C.  cholesterol. D.  glycolipid. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you know about the structure of a phospholipid? What other information is related to the question? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

In this treatment of bacteria with cold transformation solution followed by heat-shock, the procedure

(a) transformed cells. (b) nontransformed cells. (c) cells that have the gene for resistance to the antibiotic. (d) both a and c.

Biology & Microbiology

How is a T-cell receptor different from a B-cell receptor?

A. T-cell receptors must have antigen broken down inside a cell and presented to them by a Major Histocompatibility Complex (MHC) molecule. B. B-cell receptors must have antigen broken down inside a cell and presented to them by a Major Histocompatibility Complex (MHC) molecule. C. T-cell receptors are composed of 4 protein chains (pieces), while B-cell receptors are composed of only 2 pieces. D. T-cell receptors are eventually secreted into the bloodstream by activated T-cells, whereas B-cell receptors are not; they always stay with the B-cell.

Biology & Microbiology

Membrane rafts are found in the cytoplasmic membranes of

A) archaea only. B) bacteria only. C) eukaryotes only. D) both archaea and bacteria. E) both archaea and eukaryotes.

Biology & Microbiology