The $\underline{\text{primary}}$ Source of Oxygen for Earth's Atmosphere During the Past Half

question 34

Multiple Choice

The $\underline{\text{primary}}$ source of oxygen for Earth's atmosphere during the past half billion years or so appears to be

• A)volcanic eruptions.
• B)photosynthesis.
• C)​radiant heat.
• D)​exhalations of animal life.
• E)​transpiration.

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Definitions:

Anterior Pituitary

The front segment of the pituitary gland, secreting hormones that regulate various physiological processes.

FSH Secretion

Follicle-stimulating hormone (FSH) secretion involves the release of FSH by the anterior pituitary gland, which plays a crucial role in regulating the reproductive processes of the body.

Seminal Vesicles

Glands located behind the bladder in males that secrete a fluid rich in sugar that nourishes and helps spermatozoa to move.

Bulbourethral Glands

Small glands located on either side of the urethra in males that secrete a fluid contributing to the lubrication of the urethra for spermatozoa to pass through.