During inspiration (a.k.a. inhalation) of air into the lung of a mammal

A. the chest cavity has a positive pressure.
B. the diaphragm moves upward.
C. the diaphragm contracts.
D. the rib cage moves down.
E. the intercostal muscles relax.


C. the diaphragm contracts.

Biology & Microbiology

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Assuming a cleft chin is dominant, the father’s genotype would be __________

a. Cc b. CC c. cc d. either Cc or cc

Biology & Microbiology

In Frederick Griffith's experiment, live R cells and dead S cells were injected into mice, causing fatal pneumonia. Neither live R cells nor dead S cells alone cause pneumonia, so Griffith concluded that _____

1.DNA is the genetic material 2.some, but not all, R cells cause pneumonia 3.DNA encoding the ability to form capsules was released from dead S cells and picked up by R cells 4.hereditary information of unknown identity transformed R cells into S cells 5.DNA controls the synthesis of specific products

Biology & Microbiology

the --- of life arises from the adaptations of species to different habitats over long spans of time

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

Fungi can form functional associations with which of the following?

A. Animals B. Plant roots and phototrophic microbes C. Phototrophic microbes D. Plant roots

Biology & Microbiology