ASVAB General Science Practice Test 314749 Results

	Your Results	Global Average
Questions	5	5
Correct	0	3.33
Score	0%	67%

Review

Which of the following is true about species groups?

46% Answer Correctly

	a biome is a made up of a group of biospheres
	a community is made up of a group of populations
	a population is made up of a group of communities
	an ecosystem is a biological population

Solution

A population is a group of organisms of the same species who live in the same area at the same time. A community is a group of populations living and interacting with each other in an area.

Gametes have how many pairs of chromosomes?

76% Answer Correctly

	23
	2
	4
	46

Solution

Reproductive (haploid) cells known as gametes have half as many (23) pairs of chromosomes as normal (diploid) cells. When the male gamete (sperm) combines with the female gamete (ovum) through meiosis to form a zygote, each gamete supplies half the chromosomes needed to form the normal diploid cells.

The coldest point in the Earth's atmosphere is reached in which atmospheric layer?

52% Answer Correctly

	thermosphere
	stratosphere
	mesosphere
	troposphere

Solution

In the mesosphere, temperature again drops as altitude increases until the coldest point in the Earth's atmosphere, the mesopause, is reached where temperatures fall to −225 °F (−143 °C).

Food is mixed with gastric acid and pepsin in the __________ to help break down protein.

76% Answer Correctly

	stomach
	large intestine
	mouth
	small intestine

Solution

Food is mixed with gastric acid and pepsin in the stomach to help break down protein.

What is a major difference between the somatic and autonomic nervous systems?

82% Answer Correctly

	one controls thinking, the other controls feeling
	one is inherited, the other is learned
	each belongs to a different nervous system
	one controls voluntary activity, one controls involuntary activity

Solution

Both are part of the peripheral nervous system. The somatic nervous system sends sensory information to the central nervous system and controls voluntary actions while the autonomic nervous system regulates involuntary activity in the heart, stomach, and intestines.