Science 8 Yearly Review

The shape of the DNA molecule is a double __________________?

• "S"
• helix
• rope
• curve

What kind of information does DNA carry?

• genetic
• nuclear
• cell structure
• it doesn't carry any info

White hair (W) is dominant in horses, and non-white (w) is recessive. A dominant WW horse is crossed with a recessive ww horse, as shown in the Punnett square. What percentage of offspring would have white hair?

• 0%
• 50%
• 75%
• 100%

A phenotype is the...

• letter combination
• dominant gene
• recessive gene
• physical appearance

The part of a flower that produces the male reproductive cells.

• anther
• style
• stigma
• ovary

Small grains that contain a plant's male reproductive cells.

• stamen
• pollen
• anther
• stigma

Which system are the lungs in?

• respiratory
• digestive
• excretory

Which system is the stomach in?

• respiratory
• digestive
• nervous

___________ are the building blocks of life.

• cells
• legos
• blocks
• blood

Which system fights disease?

• excretory
• nervous
• immune
• digestive