An early marine biology expedition to the North Pole was led by:

a. Sir Alistair Hardy.
b. Alexander Agassiz.
c. Fridtjof Nanson.
d. Charles Wyville Thomson.
e. Robert Peary.


C

Biology & Microbiology

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A structure that develops from an axillary bud is:

A. a leaf scar B. a terminal bud C. a branch D. a bud scale scar E. None of the choices is correct

Biology & Microbiology

A water concentration gradient is influenced by the number of solute molecules present on both sides

of the membrane.

Indicate whether the statement is true or false.

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This chemical is produced at the terminus of the axon, is typically a protein, and diffuses across the synaptic cleft to cause the neural message to be continued in the receiving cell

a. ATP b. ACH c. ACTH d. TSH e. neurotransmitter

Biology & Microbiology

Which of the following statements regarding breathing and circulation in insects is false?

A) Insects lose very little water by using a tracheal system to breathe. B) The tracheal system of insects consists of a series of branching air tubes that extend from the surface to deep inside the body. C) Terrestrial animals such as insects spend much more energy than aquatic animals to ventilate their respiratory surfaces. D) The circulatory system of insects is not involved in transporting oxygen.

Biology & Microbiology