Darwin Could Not Initially Understand How Variation Occurred in Living

question 26

True/False

Darwin could not initially understand how variation occurred in living organisms.​

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Definitions:

Embryo

An early stage of development for multicellular organisms, in humans, it refers to the period from fertilization until the end of the eighth week of gestation.

Artificial Insemination

A medical procedure involving the direct insertion of sperm into a woman's uterus or cervix to achieve pregnancy without sexual intercourse.

Semen

The male reproductive fluid containing sperm that is ejaculated during orgasm.

Ovulation

The phase in a woman's menstrual cycle during which an egg is released from the ovary.