Question

1. which of the following is not a function of the roots of a plant?

a. anchors the plant in the soil.
b. stores food for the plant.
c. contains tissues that collect and transport water and nutrients.
d. produces seeds for reproduction.

1. inhaled air first enters the lungs by way of a(n)

a. bronchiole
b. bronchus
c. capillary
d. alveolus

1. peristalsis in the digestive system is caused by the

a. contraction of smooth muscle layers
b. closing of the epiglottis
c. stretching of the salivary glands
d. action of digestive enzymes

1. like veins, the heart must allow blood to flow only in one direction. in order to keep blood flowing in one direction, the heart and veins have

a. gates
b. muscle
c. valves
d. chambers

part b: completion 11 marks
right the word(s) that best completes each sentence in the space provided on the answer sheet.

1. in plant and animal cells, the ____________ controls the movement of materials into and out of the cell.

1. the ____________ are an organelle found only in animal cells that control the movement of chromosomes during cell division.

1. in plant and animal cells, the function of the ____________ is to convert energy the cell receives into a usable form.

1. the ____________, or windpipe, leads from the pharynx toward the lungs.

1. the main function of a ____________ blood cell is to transport oxygen to the cells of the body.

1. tissues are collected together form a(n) ____________ that performs a major function in an organism.

1. in the mouth, digestion occurs both when food is chewed, and also when saliva breaks down sugars. the breakdown of food involves both ____________ digestion and chemical digestion.

1. one of the roles of the ____________ intestine is to prepare waste material for elimination.

1. alveoli have a large surface area that enables them to absorb a large amount of ____________ as it enters the lungs and eventually is delivered to the mitochondria of cells.

1. the organ systems that are interdependent (work together) when we drink milk to heal broken bones are the __________ system, __________ system and the skeletal system

Explanation:

1. Cell membrane regulates material movement in/out of cells.
2. Centrioles (animal-only organelles) control chromosome movement in cell division.
3. Mitochondria convert energy to usable forms (ATP) in cells.
4. Trachea is the windpipe connecting pharynx to lungs.
5. Red blood cells transport oxygen via hemoglobin.
6. Tissues form organs (structures with major functions).
7. Mechanical digestion (chewing) and chemical digestion (saliva) occur in the mouth.
8. Large intestine prepares waste for elimination.
9. Alveoli absorb oxygen for cellular respiration.
10. Digestive (absorbs nutrients), circulatory (transports nutrients), and skeletal systems work together to heal bones.

Answer:

1. cell membrane
2. centrioles
3. mitochondria
4. trachea
5. red
6. organ
7. mechanical
8. large
9. oxygen
10. digestive; circulatory