N5 Biology Unit 2 - multicellular organisms

What is another name for cell division?

• Meiosis

• Mitosis

• Stem cell

• Reproduction

Why is cell division essential in multicellular organisms?

• For growth and repair

• For energy production

• For nutrient absorption

• For waste elimination

Do cells produced by mitosis have the same chromosome structure as the parent cell?

• Yes, they have exactly the same chromosome structure

• No, they have a completely different chromosome structure

• Yes, but they have half the number of chromosomes

• No, they have double the number of chromosomes

How many chromosomes do human diploid cells have?

• 23

• 46

• 92

• 44

What are the two copies of each chromosome in a diploid cell called?

• Chromatids

• Genes

• Alleles

• Haploids

During cell division, what happens after chromosomes line up at the equator of the cell?

• The nuclear membrane forms around each set of chromosomes.

• Spindle fibers pull chromatids apart to opposite ends of the cell.

• Cytoplasm divides and two separate diploid cells are formed.

• Each chromosome makes an identical copy of itself.

What forms around each set of chromosomes during cell division?

• Cytoplasm divides

• Spindle fibers

• Nuclear membrane

• Cell wall

What is the final stage of cell division?

• Chromosomes line up at the equator of the cell.

• Nuclear membrane forms around each set of chromosomes.

• Cytoplasm divides and two separate diploid cells are formed.

• Each chromosome makes an identical copy of itself.

What is the function of Red blood cells (RBC)?

• To carry messages around the body in the form of electrical impulses.

• To fuse with a sperm cell during fertilisation.

• To carry (transport) oxygen around the body for use in respiration.

• To swim through the female reproductive system to fertilise an egg in the oviduct.

How are Red blood cells (RBC) adapted to carry oxygen?

• They have long extensions to allow them to send information over long distances.

• They contain a large store of food to provide energy.

• They are streamlined in shape and have a tail.

• They contain haemoglobin and are biconcave in shape to maximise the area available in the cell to carry oxygen.