If a DNA molecule is compared to a spiral staircase, what parts make up the steps?

sugar and nitrogen base

pairs of nitrogen bases

sugar and phosphate

pairs of sugars

Photosynthesis takes place faster in which type of light?

A physical characteristic that is passed down from one generation to the next?

A baby is born with what the primary care provider believes is a diagnosis of trisomy 21. this means that the infant has three number 21 chromosomes. what factor describes this genetic change?

How does the removal of the top predator in the food chain described affect other organisms? The frog population will increase The frog population will decrease There will be no effect on the frog populaiton. The number of grasshoppers will increase

What is 60 nanoseconds in standard form?

Which parts of the cell take care of: PHS, protein synthesis, energy production?

Using the data below, determine which type of moth is best adapted to its environment. a. Light moths on light trees. b. Light moths on dark trees. c. Dark moths on light trees. d. Dark moths on dark trees.

How is fetal circulation different from adults?

Which of the following appeared before the first cells evolved

What process occurs so plants can make glucose for energy