What are the sources of sulfur in the atmosphere?

A) Mostly (over 90%) volcanoes and photosynthetic bacteria
B) Mostly transportation modes, such as autos, trucks, and planes
C) Volcanoes and hot springs, but mostly (about 75%) human activities such as burning coal
D) Decomposition and small amounts from pollution
E) Natural and human sources, in equal amounts


C

Biology & Microbiology

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The structure labeled "C" is the ____

a. trunk of the pulmonary arteries b. left atrium c. left ventricle d. right atrium e. right ventricle

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With the same situation as the previous question, what would the resulting F2 plants be?

What will be an ideal response?

Biology & Microbiology

Plants have evolved all of the following methods to help them conserve water except

A. a waxy cuticle. B. stomata. C. mycorrhizae. D. spores.

Biology & Microbiology

Neurulation begins in the ____ region and moves in the ____ direction(s).

A. Cranial; Rostral B. Cervical; Medial & Lateral C. Cervical; Rostral & Caudal D. Thoracic; Rostral & Caudal E. Lumbar; Medial & Lateral

Biology & Microbiology