GED Science Life Science Concepts Quiz

1. What is the primary function of DNA in living organisms?

Storing genetic information and directing protein synthesis

Breaking down glucose for energy

Transporting oxygen throughout the body

Regulating body temperature

2. Which of the following is an example of a density-dependent limiting factor in a population?

Disease spread among crowded individuals

A hurricane destroying habitats

A volcanic eruption

A meteor strike

3. What is the process called when an organism's population grows in an ideal environment with unlimited resources?

Exponential growth

Logistic growth

Carrying capacity

Population decline

4. Which type of protein helps speed up chemical reactions in cells?

Enzymes

Antibodies

Hormones

Structural proteins

Submit

6. What is the primary function of the respiratory system?

Gas exchange (oxygen uptake and carbon dioxide removal)

Regulating body pH and ion balance

Producing antibodies to fight infection

Storing energy as glycogen

Submit

8. Which gland secretes insulin to regulate blood glucose levels?

Pancreas

Thyroid

Adrenal

Pituitary

9. What is the primary role of the circulatory system in the human body?

Transporting oxygen, nutrients, and waste throughout the body

Controlling hormone production and metabolism

Breaking down food and absorbing nutrients

Filtering blood and producing urine

10. In an ecosystem, which organisms are responsible for breaking down dead organic matter?

Decomposers

Producers

Primary consumers

Secondary consumers

11. What evidence supports the theory of evolution by natural selection?

Fossil records, comparative anatomy, and DNA similarities among species

The complexity of ecosystems and biodiversity

The age of Earth and geological layers

Variations in human intelligence and culture

12. In Mendelian inheritance, if both parents are heterozygous for a trait, what is the probability their child will be homozygous recessive?

25%

50%

75%

100%

13. In the process of photosynthesis, what do plants use to produce glucose?

Sunlight, water, and carbon dioxide

Oxygen, nitrogen, and minerals

Glucose, ATP, and chlorophyll

Soil, bacteria, and decomposed matter

14. Which type of natural selection favors individuals at both extremes of a trait distribution?

Disruptive selection

Stabilizing selection

Directional selection

Sexual selection

15. Which statement best describes the relationship between genotype and phenotype?

Genotype is an organism's genetic makeup; phenotype is its observable traits

Phenotype determines which genes an organism inherits

Genotype and phenotype are identical in all organisms

Phenotype is only influenced by environmental factors

16. Which organelle is responsible for producing energy in a eukaryotic cell?

Mitochondrion

Nucleus

Ribosome

Golgi apparatus

17. In the human digestive system, which organ produces bile to aid in fat digestion?

Liver

Pancreas

Stomach

Small intestine

Submit

19. In the nitrogen cycle, which process converts atmospheric nitrogen into usable forms for plants?

Nitrogen fixation

Nitrification

Denitrification

Ammonification

Submit

GED Science Life Science Concepts Quiz

1. What is the primary function of DNA in living organisms?

2.

What first name or nickname would you like us to use?

2. Which of the following is an example of a density-dependent limiting factor in a population?

3. What is the process called when an organism's population grows in an ideal environment with unlimited resources?

4. Which type of protein helps speed up chemical reactions in cells?

5. The ____ is the basic structural and functional unit of all living organisms.

6. What is the primary function of the respiratory system?

7. The process by which white blood cells engulf and destroy pathogens is called ____.

8. Which gland secretes insulin to regulate blood glucose levels?

9. What is the primary role of the circulatory system in the human body?

10. In an ecosystem, which organisms are responsible for breaking down dead organic matter?

11. What evidence supports the theory of evolution by natural selection?

12. In Mendelian inheritance, if both parents are heterozygous for a trait, what is the probability their child will be homozygous recessive?

13. In the process of photosynthesis, what do plants use to produce glucose?

14. Which type of natural selection favors individuals at both extremes of a trait distribution?

15. Which statement best describes the relationship between genotype and phenotype?

16. Which organelle is responsible for producing energy in a eukaryotic cell?

17. In the human digestive system, which organ produces bile to aid in fat digestion?

18. The ____ is the maximum population size an environment can support sustainably.

19. In the nitrogen cycle, which process converts atmospheric nitrogen into usable forms for plants?

20. Meiosis produces four ____ cells, each with half the chromosome number of the parent cell.