You have a vial containing 20.0g of oxygen gas. What is the percent composition of oxygen? SELECT AN ANSWER

Cannot be determined without more information

83%

100%

90.8% oxygen

pleas

pleas

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.

This is collection of data made by comparing objects in standard units. in science, the units are metric.