ASVAB-GENERAL SCIENCE PRACTICE TEST 2 EXAM

PDF Download

ASVAB-GENERAL SCIENCE PRACTICE TEST 2 EXAM

QUESTIONS

Actual Qs and Ans - Expert-Verified Explanation -Guaranteed passing score -50 Questions and Answers

-Format: Multiple-choice / Flashcard

Question 1: The Earth is about 4.5 billion years old. About how many years ago did life first appear?

• 3.5 billion years
• 1.5 billion years
• 3.5 million years
• 1.5 million years

Answer:

• 3.5 billion years

There are many arguments about when life first appeared on Earth, with some estimates placing life starting as long ago as 3.8 billion years. The generally accepted estimate is 3.5 billion years ago, and these first life forms were single celled organisms and RNA molecules that could self replicate.

Question 2: Approximately how many bones exist in the human body?

A. 100

B. 200

C. 300

D. 400

Answer:

B. 200

There are 206 human bones in the body. We actually are born with more bones, about 260-270.However, many of these smaller bones fuse into one another by age 1, resulting in 206 'official' bones.Question 3: Carbon dioxide can be consumed and converted into glucose by what type of organism?

• Insects
• Animals
• Plants
• Fish

Answer:

• plants

Plants are capable of photosynthesis, and they use light energy from the sun to consume carbon dioxide and water to form glucose.Question 4: The cell membrane is a structure composed primarily of:

• Carbohydrate
• Lipid
• Protein

D. DNA

Answer:

• Lipid

The cell membrane is a lipid bilayer, and is composed primarily of two layers of lipid molecules that are lying opposite to one another. The cell membrane does contain some protein, but not very much.Question 5: All of the following are phenotypic traits except for:

• red hair
• blue eyes
• missing 22nd chromosome

• wide ears

Answer:

• missing 22nd chromosome

Phenotypic traits are those that are expressed physically, including red hair, blue eyes, ears, teeth, or skin (among many more). Genotypic traits cannot be seen physically, but are present in your genome.As a result, a missing 22nd chromosome is a genotypic trait, although it would undoubtedly result in some phenotypic traits as well.Question 6: Which blood cells are responsible for delivering oxygen to the body?

• red blood cells
• white blood cells
• platelets
• thrombocytes

Answer:

• red blood cells

Red blood ceterm-49lls carry oxygen to the body using hemoglobin. White blood cells help the body fight infection, and platelets help assist in forming clots to stop bleeding. Thrombocyte is another name for platelet.Question 7: Plants are autotrophs, meaning that they:

• are able to grow very quickly
• are able to consume smaller organisms
• are able to automatically defend themselves
• are able to produce their own food

Answer:

• are able to produce their own food

Autotrophs are organisms that are able to produce their own food. On the other hand, heterotrophs are organisms that must consume other organisms to survive.

Question 8: Which type of rock would likely be found at the bottom of a river bed?

• sedimentary
• igneous
• metamorphic
• basalt

Answer:

• Sedimentary

Sedimentary rock is formed from 'sediment', which is a mixture of sand, shells, and other small pieces of material commonly located at the bottom of a river or a lake. Basalt is a type of igneous rock, formed by volcanoes.Question 9: When a human cell divides in mitosis, the two daughter cells will each have:

• 23 chromosomes
• 46 chromosomes
• 13 chromosomes
• 35 chromosomes

Answer:

The human genome has 23 pairs of chromosomes, meaning that each cells has a total of 46 chromosomes. In mitosis, each daughter cell has a full copy of the parents DNA, and will also have 46 chromosomes.Question 10: Of the following layers of the atmosphere, which is the closest to the earth's surface and contains the majority of clouds?

• Exosphere
• Mesosphere
• Troposphere
• Stratosphere

Answer:

• Troposphere

The troposphere is the layer of the atmosphere that is immediately above the Earth's surface. Next up is