F4 15.7 Growth in humans and animals

Diagram 6 shows a sigmod curve for the growth of an organism.

Which of the phases labelled A, B, C and D shows the rapid growth in an organism?

• A

• B

• C

• D

Diagram 7 shows a growth curve of an organism. Which of the following statements about the above growth curve are correct?

I The horizontal line shown that there is no growth occur in the organism in terms of body mass.

II The growth curve shows the growth of an organism in terms of body length.

III Adult organism does not undergo ecdysis anymore.

IV All the organisms with exoskeleton show the same growth curve.

• A I and II

• B. I and III

• C. II and III

• D. II and IV

Growth in multicellular organism such as humans and animals is an __________ process which involve the increase in quantitative parameters such as size (height or length), body mass , volume and number of cells.

• irreversible

• reversible

Organisms with __________ such as insects, crabs and prawns undergo growth by either complete metamorphosis or incomplete metamorphosis.

• exoskeleton

• endoskeleton

• hydrostatic skeleton

In __________, the growth of organisms involves four stages starts from egg to larva, larva to pupa and from pupa to adult.

• complete metamorphosis

• incomplete metamorphosis

In __________ , the growth of organisms only involves three stages starts from egg to larva and from larva to adult.

• incomplete metamorphosis

• complete metamorphosis

In general, all growth in humans and animals show __________ sigmoid growth curves.

• S-shaped

• C-shaped

• J-shaped

The sigmoid growth curve can be divided into __________ phases.

• three

• four

• five

• six

Growth curve in animal with exoskeleton by using parameter length is __________.

• staircase shaped

• J-shaped

• S-shaped

• C-shaped

In order to grow in size, insects must undergo a moulting process known as __________.

• ecdysis

• complete metamorphosis

• incomplete metamorphosis