The First Life Forms on Earth Arose

question 2

Multiple Choice

The first life forms on Earth arose:

• A) more than 3.5 billion years ago.
• B) at the same time as the formation of the Earth.
• C) relatively recently - about 250,000,000 years ago.
• D) about 10,000 years ago.

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Definitions:

Secondary Amenorrhea

The cessation of menstrual periods for three months or more after regular menstrual cycles have been established, not due to pregnancy, menopause, or other natural reasons.

Secondary Dysmenorrhea

Painful menstruation that is caused by an underlying disease, disorder, or structural abnormality in the reproductive organs.

Primary Endometrial Cancer

A type of cancer that originates in the lining of the uterus (endometrium), it is the most common form of uterine cancer.

Premenstrual Syndrome

A set of physical and emotional symptoms that some women experience before their menstrual period.