Understanding Seed Structure and Functions

Which part of the seed protects it from damage and drying out?

• Cotyledon

• Seed coat

• Embryo

• Root

What is the main function of the cotyledon in a seed?

• To absorb water

• To store food for the embryo

• To protect the seed

• To help the seed float

Which part of the seed develops into a new plant?

• Seed coat

• Cotyledon

• Embryo

• Fruit

Which of the following is NOT a part of a typical seed?

• Embryo

• Cotyledon

• Leaf

• Seed coat

If a seed’s coat is damaged, what is most likely to happen to the seed?

• It will grow faster

• It may dry out or get infected

• It will produce more cotyledons

• It will become larger

Tags

NGSS.MS-LS1-5

Why is the cotyledon important for the early growth of a plant?

• It helps the seed float in water

• It provides nutrients to the embryo before true leaves grow

• It protects the seed from insects

• It absorbs sunlight for photosynthesis

How does the seed coat help in the survival of seeds in harsh environments?

• By storing food

• By allowing the seed to breathe

• By acting as a barrier against water loss and pathogens

• By helping the seed photosynthesize

Tags

NGSS.MS-LS4-4

A scientist wants to test how different conditions affect embryo development in seeds. Which variable should she change to see the effect on embryo growth?

• Amount of sunlight

• Thickness of the seed coat

• Amount of water provided

• Color of the cotyledon

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

Imagine you are planting seeds in two different soils: one is dry and one is moist. Predict what will happen to the embryo in each case and explain your reasoning.

• The embryo will grow better in dry soil because it needs less water.

• The embryo will grow better in moist soil because water is needed for germination.

• The embryo will not grow in either soil.

• The embryo will grow equally well in both soils.

Tags

NGSS.MS-LS1-5

NGSS.MS-LS2-1

A student observes that some seeds do not sprout even though they have a healthy cotyledon and embryo. What could be a possible reason for this, based on your understanding of seed parts and their functions?

• The seed coat is too thick and prevents water from entering.

• The cotyledon is absorbing too much sunlight.

• The embryo is producing too many leaves.

• The seed coat is missing.