Openings in leaves through which gases enter and exit are called:

a. mesophylls
b. xylems
c. rubiscos
d. stomata
e. phloems


d

Biology & Microbiology

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Nematode worms and annelid worms share which of the following features?

A) a digestive tract with two openings (a mouth and an anus) B) molting C) presence of a circulatory system D) presence of segmentation E) absence of species with parasitic lifestyles

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Consider the ADH reaction below, and answer the following question. ADH stands for alcohol dehydrogenase

In this reaction, ADH represents the ____.

a. enzyme b. reactant c. product d. activation energy e. trigger

Biology & Microbiology

Helicobacter pylori has been associated with:a

emphysema. b. duodenal ulcers. c. peptic ulcers. d. lung cancer. e. skin infections.

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The plant in row b of Figure 38-2 demonstrates a photoperiodic response characteristic of:

a. short-day plants. b. day-neutral plants. c. long-day plants. d. long-night plants. e. intermediate-day plants.

Biology & Microbiology