Life cycles

The sun is considered the ultimate source of energy for life on Earth because _______________.

• All organisms carry out photosynthesis.
• Some organisms carry out cellular respiration.
• The sun heats the Earth's atmosphere.
• Every food chain starts with an organism that goes through the process of photosynthesis.

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is an annual plant?

• Plants that live for 2 years and then die.
• Plants that come back year after year.
• Plants grow from a seed, flower and then produce seeds all in one season.  It dies after producing new seeds.

In the life cycle of a plant, the plant eventually dies and then there are seeds left which germinate to produce new plants. Which of the following means that the plant will take two years to complete their life cycle? 

• Annual
• Perennial
• Biennial

According to the picture, which stage does pollination occur in the life cycle of flowering plants?

• A
• B
• C
• D

Tags

NGSS.MS-LS1-4

Clothing and over the counter medicines can be made using flowering plants.

• True
• False

Plants are very important to us.  All food people eat comes directly or indirectly from plants. 

• True
• False

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

What is the beginning of the life cycle called for animals and humans?

• Death
• Birth
• Germination
• Seedling

The word metamorphosis means...

• a change in shape.
• no change.
• to be equal.

Most animals that include fish, reptiles, and mammals have very simple life cycles. Which of the following is true? 

• They are born (either hatched from eggs or live from a mother).
• They grow.
• They become adults.
• All of the choices are correct.

Tags

NGSS.3-LS1-1

Death is the first stage of the life cycle.

• True
• False