During swallowing, the air passageway of the pharynx is covered by the

a. larynx
b. epiglottis
c. trachea
d. bronchi


Ans: b. epiglottis

Biology & Microbiology

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Viruses variously depend on their host cell for parts of the viral replication and maturation process. Many viruses do however encode for some enzymes that facilitate certain steps or virus-specific processes for viral replication and maturation

Which cellular processes and enzymes do ALL viruses lack and must therefore ALWAYS be supplied by the host cell? What will be an ideal response?

Biology & Microbiology

The difference between fungal endomycorrhizae and fungal endophytes is:

A. Endomycorrhizae live inside fungi and endophytes live inside plants. B. Endomycorrhizae form arbuscules that facilitate exchanges of water and food between the fungus and plant root cells, whereas endophytes invade plant cells and provide the plant with protective antibiotics and toxins. C. Endomycorrhizae are beneficial to its host plant but endophytes harm the host plant. D. Endomycorrhizae form arbuscules on plant roots that produce toxins killing parasitic nematodes, whereas endophytes assist in the transport of water through the plant. E. none of the other choices provided

Biology & Microbiology

The reproductive organ in males that produces sperm and testosterone for reproduction. _____

A) Endometrium

B) Testis

C) Cervix

D) Uterus

E) Oviduct

F) Ovaries

G) Vagina

H) Seminal vesicle

I) Penis

J) Prostate gland

K) Vas deferens

L) Glans penis

Biology & Microbiology

Gated channels are especially important in regulating the transport of ________ across a plasma membrane

A) glucose B) water C) ions D) small uncharged molecules E) nucleic acids

Biology & Microbiology