Which gland secretes sex hormones?

a. testis
b. adrenal medulla
c. thyroid
d. kidney
e. pancreas


A

Biology & Microbiology

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The intracellular parasite Nanoarchaeum equitans has one of the smallest prokaryotic genomes. Why is the genome of N. equitans so small?

How is it possible that the genome of N. equitans contains more genes than that of Mycoplasma genitalium, which is actually 90 kbp larger? What will be an ideal response?

Biology & Microbiology

The habitats most favorable for the growth of legumes in symbiosis with nitrogen-fixing bacteria are

A. calcium-poor soils. B. nitrogen-poor soils. C. phosphorus-poor soils. D. manganese-poor soils. E. potassium-poor soils.

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The tox gene that codes for the exotoxin is introduced into strains of Corynebacterium diphtheriae by a lysogenic bacteriophage

a. true b. false

Biology & Microbiology

Which of the following processes is not involved in allopatric speciation?

a. genetic drift c. natural selection b. mutation d. migration

Biology & Microbiology