Photosynthesis

1. What do you call the process wherein plants make their own food?

• cellular respiration

• oxygen cycle

• photosynthesis

• protein synthesis

Which of the following is NOT a requirement of photosynthesis?

• carbon dioxide

• light energy

• oxygen

• water

Mesophyll layer of the leaf plays an important role in trapping the light energy from the sun. Upon which photosynthesis mosty take place in this layer? why is it so?

• because it contains air spaces

• because it is transparent allowing light to penetrate

• because it has the greatest number of chloroplast

• because if provides an entrance and exit of gases

A hydrilla is placed on a beaker with water and was exposed to the sun. After few minutes, gas bubbles were observed around the leaf. What do you think are those gas bubbles?

• carbon dioxide

• glucose

• nitrogen

• oxygen

Stomata are mostly found on the lower epidermis of the plant leaf. Which of the following does NOT explain the importance of the anatomical location of stomata in plants?

• To lessen the rate of photosynthesis

• To avoid direct exposure to the sun

• To prevent excessive water loss in plants

• To regulate water vapor from exiting the plants

What is the main function of the stomata in plants?

• To trap light energy from the sun

• To prevent the plant from wilting

• To regulate gas exchange and water loss in plants

• To help the plant to capture oxygen and release carbon dioxide

What is the function of guard cells in plants?

• They protect the plants from insects and other animals

• It is one of the raw materials needed for photosynthesis

• It is an outer membrane in plant cells that controls water

• They control and regulate the opening and closing of the stomata

What are the raw materials needed for photosynthesis?

• oxygen, water, sunlight

• oxygen, sunlight, carbon dioxide

• oxygen, water, carbon dioxide

• water, sunlight, carbon dioxide

It is a protecting film covering the outermost skin layer (epidermis) of leaves, young shoots and other aerial plant organs?

• cuticle

• epidermis

• guard cells

• stomata

This is a pigment that gives plants their green color, and it helps plants create their own food through photosynthesis.

• chlorophyll

• chloroplast

• guard cells

• stomata