ASVAB General Science Practice Test 168052 Results

	Your Results	Global Average
Questions	5	5
Correct	0	2.78
Score	0%	56%

Review

Within DNA, a variety of a particular gene is called a(n):

55% Answer Correctly

	allele
	chromosome
	homozygous
	heterozygous

Solution

The gene is the base unit of inheritance and is contained within DNA. A gene may come in several varieties (alleles) and there are a pair of alleles for every gene. If the alleles are alike, a person is homozygous for that gene. If the alleles are different, heterozygous.

What part of the nervous system controls simple reflexes?

54% Answer Correctly

	medulla
	autonomic
	spinal cord
	cerebrum

Solution

The spinal cord connects the brain to the body's network of nerves. It carries impulses between all organs and the brain and controls simple reflexes.

A biological community of interacting organisms and their physical environment is known as:

79% Answer Correctly

	biome
	population
	ecosystem
	community

Solution

An ecosystem is a biological community of interacting organisms and their physical environment. This includes both the biotic (living) and abiotic (non-living).

The universal recipient blood type can recieve any other blood type. Which blood type is the universal recipient?

45% Answer Correctly

	AB-positive
	O
	AB
	O-negative

Solution

Blood transfer is limited by the type and Rh factor of the blood. Someone who has Rh-factor negative blood cannot receive blood with a positive type but a person with Rh-factor positive type blood can receive Rh-negative blood. Type O negative blood is the universal donor because it can be given to a person with any blood type. Type AB positive is the universal recipient meaning someone with this blood type can receive any other type of blood.

Meteoroids, meteors and meteorites are categorized based on which of the following?

45% Answer Correctly

	their location
	their temperature
	their size
	their density

Solution

Smaller rocks shed by asteroids and comets are called meteoroids. When these rocks reach Earth's atmosphere, they burn up in the mesosphere and become meteors. If a meteor manages to reach the Earth, it is called a meteorite.