If a star is 100 light-years away from earth how long does it take for its light to reach the earth?

Select one:

a. 100 years

b. half the number of light-years so the answer is 50 years

13. The Greek word karuon means "nut." The prefix pro- means "before," and the prefix eu - means "true." Thus, prokaryote means "before nut," and eukaryote means "true nut.

What happens during morula

What causes the phases of the moon, eclipse, and tides

This nutrient is cycled between living things and the soil. Plants absorb this nutrient from the soil and turn it into organic compounds through assimilation.

Which is a possible effect of a dna mutation? a. protein defects that affect chemical reactions b. structural deformities c. both a and b d. neither a or b

Which of the following is a true difference between prokaryotic and eukaryotic cells? a. Eukaryotic cells have true nuclei. b. Eukaryotic cells are smaller. c. Eukaryotic cells are more ancient. d. Eukaryotic cells are less complex.

Which of the following best describes a noncontact force? A. a force that is able to act at a distance B. a force that must be physically touching the object it acts on C. a force that always pulls objects backward D.

Which type of energy used on earth comes directly from the sun

Aldosterone is secreted in response to changes in: select one: a. blood potassium levels. b. blood calcium levels. c. blood pressure. d. body temperature. e. blood glucose levels

How does a mutation in dna cause a disease that affects multiple organs?