Which of the following structures protects the delicate gills of many fish?

A) Spiracles
B) An operculum
C) Lamellae
D) Tracheoles
E) An alveolus


B

Biology & Microbiology

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Identify the hydrogen ion concentration that represents the lowest pH from the following list:a

1 ? 10?3 b. 1 ? 10?4 c. 1 ? 10?7 d. 1 ? 10?11 e. 1 ? 10?14

Biology & Microbiology

What two properties do various types of cancer cells share?

What will be an ideal response?

Biology & Microbiology

If heat energy is absorbed by the system during a chemical reaction, the reaction is said to be:

A) at equilibrium. B) endergonic. C) endothermic. D) exergonic. E) exothermic

Biology & Microbiology

Micronutrients are necessary for converting food to useful energy for muscles.

Indicate whether the statement is true or false.

Biology & Microbiology