Seed structure and Seed Germination- Year 5 Assessment 3

The cotyledon is

• the baby plant inside the seed

• the food source for the new plant

• the hard outside shell of the seed

• The small plant that first starts growing outside the seed

What is the name for the part of the seed that becomes the baby plant?

• embryo

• seed coat

• cotyledon

• seed

Which word identifies letter A?

• cotyledon
• seed coat
• embryo

Which word identifies letter B?

• cotyledon
• seed coat
• embryo

This experiment below has not started yet. It is meant to test how light affects seed germination. What needs to be fixed so that it is a fair test (a controlled experiment)?

• Use the same amount of light for all three trays.

• Use the same type of seeds in all three trays.

• Turn the heat to high under all three trays.

• Use three different amounts of water and heat for the three trays.

A farmer in Minnesota plants some tomato seeds in early spring. She plants them outdoors in

soil and adds water every day. A few weeks later, nothing has happened. What is the most likely

reason the seeds have not germinated?

• Not enough light

• Not enough water

• Not enough heat

• All of the above

The image above shows a small bean sprout. What does this sprout need to grow into a healthy plant?

• Fertilizer only

• Water only

• Light only

• Water and Light

What does this graph of plant heights show?

• Plant 2 ended up taller than Plant 1.

• Plant 1 was always taller than Plant 2.

• Plant 1 grew steadily. Plant 2 grew quickly at first and then stopped growing.

• Plant 2 grew steadily. Plant 1 grew slowly at first and then grew quickly.

Pots A and B both have plain soil, bean seeds, and the same amount of light. Pot B receives more water (see table). After 50 days the plants are measured. Based on the data, what is the correct conclusion?

• The amount of water affects the height but not the mass.

• The amount of water affects the mass but not the height.

• The amount of water affects the mass and the height.

• The amount of water does not affect the mass or the height.

Which of the following plants most likely to grew in the dark?

• Plant A

• Plant B

• Plant C

• Plant D