Which of the following is a scientific species designation?

human

Homo sapien

Homo

sapien

Observations of organisms include descriptions of why the organism has certain traits. descriptions of the number, size, and arrangement of parts of the organism. conclusions made about the characteristics of an organism.

Which statement is true about the male reproductive system? The testes produce semen. Sperm cells are the largest component in the composition of semen. The scrotum functions to keep the testes at an optimum temperature.

All mammals have hair because they inherited that trait from a common ancestor. Features that are inherited from a common ancestor are called:

One important effect of the lowering of sea levels during Earth's geologic history has been A) the breakup of the continents. B) the loss of fresh water sources. C) the disappearance of inland seas. D) the formation of new coral reefs.

What are the key roles of cell division? select all that apply.

Which of the following contains the greatest number of unipotent stem cells? A. 6-week-old embryo B. Blastocyst C. Adult D. 3-day-old embryo

How does consciously thinking about the behavior affect your performance of it?

How does the height of the first hill of a roller coaster affect the remainder of the ride?

Enlargement of body tissue blurred vision low sperm count weight gain feeling sluggish

What two substances are made in the nucleus and move to the cytoplasm?