The Natural Science Reviewer Part I

Natural science is a branch of science concerned with the description, prediction, and understanding of natural phenomena, based on empirical evidence from observation and experimentation. Mechanisms such as peer review and repeatability of findings are used to try to ensure the validity of scientific. This is the natural science reviewer as part of the General Sciences reviewer compiled by LET Review University.

1. How do hormones work?

a. by releasing adrenaline

b. by controlling cell chemistry

c. by regulating water loss

d. by controlling blood pressure

2. Name the male and female sex hormones

a. sperm cell and ovum

b. testosterone

c. chromosomes

d. red and white blood cells

3. The unit of measurement of energy in a given amount of food.

a. pound

b. kilo

c. olfactory system

d. calorie

4. Nitrogen compounds known as the building blocks of proteins

a. enzymes

b. glucose

c. nutrients

d. amino acids

5. The growth of roots towards water is an example of?

a. chemotropism

b. geotropism

c. hydrotropism

d. phototropism

6. What does DNA mean?

a. data nurturing analysis

b. deoxyribonucleic acid

c. deoxyribonucleic acid

d. deotryxyl nucleic acid

7. What are the three products of oxygen when it has been burned?

a. water, carbon dioxide and air

b. energy, water and carbon

c. energy, carbon and oxide

d. energy, air and water

8. In flowering plants, fertilization takes place in the?

a. pollen tube

b. stamen

c. ovules

d. pollen grains

9. The development of eggs without fertilization.

a. mitosis

b. parthenogenesis

c. spermatogenesis

d. mitochondria

10. Which of the following is a source of energy needed for photosynthesis?

a. water

b. soil

c. light

d. fertilizer

11. They connect roots and leaves and serve as passageways and storage for food minerals and water from the soil.

a. branches

b. stem

c. trunk

d. tap roots

12. The process by which plants produce food using carbon dioxide and water, sunlight and chlorophyll.

a. reproduction

b. photosynthesis

c. fruit bearing

d. chemosynthesis

13. Process by w/c plants reproduce asexually by using their parts such as roots, stems and leaves

a. mitosis

b. artificial propagation

c. vegetation reproduction

d. grafting

14. The smallest part of a living thing which performs all the processes a living organism does

a. organ

b. cell

c. tissue

d. system

15. A group of tissues working together to perform a complex task.

a. system

b. organ

c. network

d. skin

16. Male and female reproductive parts of a flower.

a. pollen grains and ovules

b. stamen and pistil

c. pollen grain and pistil

d. stamen and ovules

17. In the human body, the cell that most nearly resembles a one – celled animal.

a. red blood cell

b. white blood cell

c. nerve cell

d. antibodies

18. The main energy source of plants – eating animals.

a. glucose

b. starch

c. cellulose

d. glycogen

19. These are cellular secretions which help regulate the breakdown and buildup of various substances in the body.

a. enzymes

b. amino acids

c. plasma

d. hormones

20. It is the energy source of the cell which it uses for growing , reproducing and other activities.

a. adenosine triphosphate (ATP)

b. amino acids

c. Chloroplast

d. sunlight

21. It is a segment of DNA molecule which controls the appearance of a given trait.

a. chromosomes

b. genes

c. gametes

d. zygotes

22. Group of similar cells performing similar functions together.

a. organs

b. system

c. nucleus

d. tissue

23. The diffusion of water through a semi – permeable membrane.

a. osmosis

b. permeability

c. transfusion

d. capillary

24. It shows the complex food relationships of organisms in a given area and the cyclic flow of food through organisms.

a. food chain

b. food web

c. food pyramid

d. biological cycle

25. Which of the following does not occur to both respiration and fermentation?

a. energy is released

b. sugar is broken down

c. carbon dioxide is produced

d. alcohol

26. The genetic information in a DNA is coded in the _______________________?

a. sequence of ribonucleotides

b. proportion of the base results

c. base pairings

d. sequence of nucleotides

27. What will cause the process of respiration to stop?

a. absence of oxygen

b. absence of sunlight

c. decrease in water supply

d. presence of sunlight

28. What relationship exists between a bangus and tilapia in the fishpond?

a. commensalisms

b. mutualism

c. competition

d. predation

29. Taxonomy is the study of the classification of organisms based on their?

a. genetics

b. evolutionary history

c. development pattern

d. habitat

30. A species is said to be ________ when its number is so few that it will most likely disappear altogether unless given proper protection.

a. disappearing

b. extinct

c. depleted

d. endangered

31. Some bacteria are classified as saprophytes because they are organisms which?

a. feed on dead organic matter

b. feed on other living things

c. undergo photosynthesis

d. have hydrolytic enzymes

32. In humans, food is moved down the esophagus into the stomach by means of?

a. cyclosis

b. peptic acids

c. peristalsis

d. active transport

33. The structure outside the nucleus in animal cells that is involved in mitosis.

a. ribosome

b. chromosome

c. centriole

d. microtubule

34. Coordination and integration of the body activities of man are under the direct control of the _______________?

a. reproduction and transport system

b. nervous and endocrine system

c. nervous and excretory system

d. respiratory and endocrine system

35. Genetic engineering has been utilized for the production of _______________?

a. genes

b. salivary amylase

c. uric acid crystals

d. human growth hormones

You can continue reviewing here: Natural Science Part II