Salivary glands secrete _________ to start the digestion of ___________.

A. amylase, starch
B. trypsin, proteins
C. amylase, fats
D. pepsin, proteins
E. lactase, milk


A. amylase, starch

Biology & Microbiology

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A researcher determines that her favorite plant has a symbiotic relationship with fungi. Upon closer examination, she notices that fungal cells form a sheet enclosing the root epidermis, but no arbuscules are present

Of what type of relationship is this an example? Select all correct choices. A. endomycorrhizae B. ectomycorrhizae C. mycorrhizae D. antagohizae

Biology & Microbiology

The DNA site to which the repressor protein binds is the

A. operon. B. regulon. C. operator. D. repressor

Biology & Microbiology

In the old days, milkmaids were exposed to cowpox from milking the cows, and this fortuitously gave them some protection from smallpox. What was happening in the milkmaids? 

A. They were receiving a dose of generic IgG from the sick cows. B. They were effectively receiving a vaccination from a related virus. C. They were heightening their overall immune response due to exposure to the cowpox and other cow parasites. D. They had a stronger immune response from drinking the milk, which sent cow B cells circulating through their blood.

Biology & Microbiology

Light consists of units of energy called

A. electrons. B. calories. C. neutrons. D. photons. E. pigments.

Biology & Microbiology