Which subatomic particle gets calculated in a mass number?

a. protons
b. neutrons
c. protons and neutrons
d. protons and electrons


c. protons and neutrons

Biology & Microbiology

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New roots can only form from existing root tissue

A. true B. false

Biology & Microbiology

Lichens

A. cannot reproduce B. need a nitrogen source to live C. are parasitic on trees D. are able to live in extreme environments

Biology & Microbiology

A main function of a plant's root system is to:

a. photosynthesize. b. absorb dissolved nutrients and water. c. absorb atmospheric carbon dioxide. d. capture sunlight. e. bear seed-containing fruits.

Biology & Microbiology

__________ is a process where a concentration of nerves and sensory structures forms in the head region.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology