1. _____ bonds are weak, but they give water many of its major properties. A pol

Question

1. _____ bonds are weak, but they give water many of its major properties.

A polar

B cohesive

C hydrogen

D adhesive

E solute

2. _____ allows water molecules to stick to each other. This makes _____ possible even in trees over 350 feet tall.

            A adhesion, cohesion

            B cohesion, transpiration

            C transpiration, solutions

            D adhesion, solutions

            E polarity, cohesion

3 . Around the world, healthiest diets are those which include lots of _____.

            A Coke

            B coffee

            C processed carbs

            D protein

            E fruits and vegetables

4. _____ speed up reactions in our bodies, so are crucial for helping us break down food and build up our macromolecules and cells.

A Vitamins

B Minerals

C Enzymes

D Nutrients

E Stimulants such as caffeine

5. _____ make their own food, for they convert sunlight into chemical energy.

A Autotrophs

B Chloroplasts

C Heterotrophs

D Carnivorous plants

E Green lizards and snakes

Explanation / Answer

1. C hydrogen

Hydrogen bonds are very weak and can be broken and reformed easily. Hence, hydrogen bonds in water are responsible for its life-ging major properties.

2. B cohesion, transpiration

Cohesion: water is sticky with many other substances

Transpiration: Evaporation of water from the arial parts of the plants.

Water is pulled up to large height in the plant. Water will be evaporated from the terminal positions, which results increase in concentration of solutes. This facilitates pulling of the water from the lower parts of the body. Because of the above to phenomena,

3.   D proteins

Proteins are main important macronutriens of our body, which are bulding blocks of body. Inaddition to that, they repair the cells in the body.

4. C Enzymes

Each and every reaction needs thresold temperature. Enzymes compensate the temperature and speed up the metabolic reactions in the body. Enzymes break down the macromolecules into monomers thereby easily digested.

5. A Autotrophs

Autotrophs are the organisms, which can synthesize their own food material from water and CO2 by using sun light due to the presence of chloroplast in the aerial parts.

Eg. Plants

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