Onion Root Tip - Check In

Cells will divide when they . . .

Check ALL that apply.

• get too old

• are damaged

• are growing the body

• have too much DNA

• get too large

Tags

NGSS.HS-LS1-4

Why is an onion root tip a good place to look for dividing cells?

• Because it is place where the plant is growing

• Because it is a place where the plant is healing

• Because it is a place where the plant is reproducing

• Because it is a place where the plant is absorbing water

Tags

NGSS.HS-LS1-4

There are many dots on the screen.

Mark only the dots touching a cell that is currently dividing

Tags

NGSS.HS-LS1-4

We know that the nucleus is a central feature of many cells.

In Eukaryotes, it is the job of the nucleus to store what material?

• Proteins
• DNA
• Lipids
• Carbohydrates
• Cytoplasm

Tags

NGSS.HS-LS3-1

As a cell divides, we seem to track this central feature.

What is the dark red material we see being moved inside this cell?

• Nucleus

• DNA

• Cytoplasm
• Hemoglobin

Tags

NGSS.HS-LS1-4

Using what you've seen in our splitting cell videos and on the onion root tip slides, place the images of a dividing cell in order from start to finish.

• 
• 
• 
• 
• 

Tags

NGSS.HS-LS1-4

DNA is a VERY long molecule. If I stretched it out straight, how long would it be?

• 5 meters
• 3 meters
• 1 meter
• 2 meters

• 10 meters

When a cell is dividing, the DNA is packaged up to move safely.

When the DNA is tightly coiled up, we call it a . . .

• protein
• enzyme
• nucleotide
• chromosome
• gene

All living things have DNA, but it can be organized differently. For example, Fruit Flies only have 8 chromosomes. How many to humans have?

• 46 Pairs

  (92 total)

• 23 Pairs

  (46 total)

• 32 Pairs

  (64 total)

• 64 Pairs

  (128 total)

Tags

NGSS.HS-LS3-1

What could happen if a dividing cell doesn't split its DNA properly?

• DNA is the instruction manual, without it the cell could die

• Nothing, there is a lot of extra DNA to make up for a few mistakes

Tags

NGSS.HS-LS3-2