As diapsids, modern birds possess two pair of temporal fenestrae in their skull

a. true
b. false


Answer: a. true

Biology & Microbiology

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While a locus refers to a unit of heredity, a gene refers to a specific position on a chromosome.

Answer the following statement true (T) or false (F)

Biology & Microbiology

If you get a Simpson's index of 1, this means

A) there is only one species in the community. B) all species are in equal proportions. C) the calculation is incorrect as this is theoretically impossible. D) the Shannon index will equal 0.

Biology & Microbiology

The tetanus toxin tetanospasmin blocks release of the neurotransmitter (GABA) that inhibits motor neurons and decreases muscle contraction

This causes persistence of the signal to contract and the resulting violent muscle contraction known as tetanic spasm. Compare the sustained contraction of muscle cells in rigor mortis with muscle contraction caused by the action of tetanospasmin on motor neurons. What will be an ideal response?

Biology & Microbiology

The cyanobacterium Trichodesmium ________.

A. fixes a significant amount of N2 in oceanic environments B. is a spherical organism C. uses nitrite as a source of nitrogen D. fixes N2 during the day

Biology & Microbiology