Which of the following is the reason humus is important as a soil component?

A. helps plants maintain upright growth
B. keeps plants in place so they do not fall over
C. puts plants closer to water sources
D. helps plants by providing more water and minerals
E. allows roots to grow deeper to reach water below


D. helps plants by providing more water and minerals

Biology & Microbiology

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The optimal temperature for most human pathogens might be expected to range from

A. 35-40?C. B. 20-45?C. C. 15-25?C. D. 93-98.6?C.

Biology & Microbiology

The most medically relevant species of Pseudomonas is P. aeruginosa

Indicate whether this statement is true or false.

Biology & Microbiology

Before stem cell research was such a prominent topic in the news, many people were misinformed about embryonic stem cell research

Many people thought that this form of stem cell research could be completed only by collecting stem cells from electively aborted fetuses. Explain specifically where embryonic stem cells come from when used for research and why these cells would not typically be found in aborted fetuses.

Biology & Microbiology

The Haldane effect describes the increase in the affinity of hemoglobin for CO2 in the presence of a lowered

A) pH. B) PCO2. C) concentration of bicarbonate (HCO3-). D) temperature. E) PO2.

Biology & Microbiology