AFCT General Science: Life and Biological 2

Question 1

What is the primary function of mitochondria in a cell?

Accepted Answer

Producing ATP (energy) through cellular respiration

Answer

Mitochondria are known as the 'powerhouses of the cell' because they produce adenosine triphosphate (ATP) through cellular respiration, converting the chemical energy in glucose into a form cells can use.

Question 2

What is the process by which plants convert sunlight into chemical energy?

Accepted Answer

Photosynthesis

Answer

Photosynthesis is the process by which plants, algae, and some bacteria use sunlight energy to convert carbon dioxide and water into glucose and oxygen, using chlorophyll in chloroplasts.

Question 3

What molecule carries genetic instructions for the development and function of living organisms?

Accepted Answer

DNA

Answer

DNA (deoxyribonucleic acid) is the molecule that carries the genetic instructions used in growth, development, functioning, and reproduction of all known living organisms and many viruses.

Question 4

What is the function of white blood cells in the human body?

Accepted Answer

Defending the body against infections and foreign invaders

Answer

White blood cells (leukocytes) are key components of the immune system. They identify, attack, and destroy pathogens such as bacteria, viruses, and other foreign substances that enter the body.

Question 5

What is natural selection?

Accepted Answer

A process where organisms with traits better suited to their environment survive and reproduce more successfully

Answer

Natural selection, proposed by Charles Darwin, is the mechanism of evolution where individuals with heritable traits better adapted to their environment have higher survival and reproductive rates, passing those advantageous traits to offspring.

(AFCT) Armed Forces Classification Test Practice Test

(AFCT) Armed Forces Classification Test Practice Test

AFCT General Science: Life and Biological 2