If an dna molecule is compared to a spiral staircase, what parts make up the steps.

A) pairs of nitrogen bases.

B) sugar and nitrogen base.

C) sugar and phosphate.

D) pairs of sugars.

Many properties of living things involve the transfer and transformation of energy and matter. For example, plant chloroplasts convert energy from sunlight to what forms of energy or matter?

Explain force velocity and duration of contraction?

Solve the inequality. x / 8 is greater than 4. a. x is greater than 1 / 2. b. x > - 4 c. x > 2 d. x > 32

What is the female reproduction organ called?

In which TWO WAYS will a dog contribute to the carbon cycle? a. It will release carbon dioxide in the atmosphere through respiration. b. It will take in carbon dioxide from the atmosphere. c.

In a pond ecosystem, what generally happen over a long period of time? A) The pond will fill in, grasses and trees will grow there B) It will become deeper than a lake. C) The water will become stagnant and everything in the pond will die.

Which statements are part of Darwin's theory of evolution? Check all that apply. Organisms stay the same over time. Organisms change over time. All organisms have common ancestors. Only some organisms have common ancestors.

Plant and animal cells are different because * Plant cells do not have a nucleus or mitochondria Animal cells do not have DNA or ribosomes Plant cells do not have a cell membrane Animal cells do not have a cell wall or chloroplasts

Does one molecule of atp contain more energy than one molecule of glucose

Which types of organisms are most vulnerable to overfishing, and why? A. Small fish that live a short time and reproduce quickly, since their population numbers are always highest. B.