How Were Conditions on the Early Earth of More Than

question 49

Multiple Choice

How were conditions on the early Earth of more than 3 billion years ago different from those on today's Earth?

• A) Only early Earth was intensely bombarded by large space debris.
• B) Only early Earth had an oxidizing atmosphere.
• C) Less ultraviolet radiation penetrated early Earth's atmosphere.
• D) Early Earth's atmosphere had significant quantities of ozone.

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Definitions:

Ovulation

Bursting of a follicle when a secondary oocyte is released from the ovary; if fertilization occurs, the secondary oocyte becomes an egg.

28-Day

Often associated with a full cycle of the moon or a typical menstrual cycle length, marked by changes or events occurring every 28 days.

Corpus Luteum

A temporary endocrine structure in female ovaries that secretes progesterone after ovulation.

Ruptured Follicle

A follicle that releases its egg during ovulation, sometimes referred to as ovulation itself.