#genral science
☆▪photosynthesis increases concentration of oxygen in air, which is necessary for
a living organism
b. fossils
c. birds only
d. animals

Suppose you are estimating the size of a blue crab population. what is the population size if the number marked in the first catch is 40, the total number in the second catch is 200, and the number marked in the second catch is 50?

Most of the carbon on earth is stored in the form of

Which of the following words best matches this definition: the process in which the best adapted organisms survive and pass on their traits, while those that are not well adapted do not survive to pass on their traits. question 3 options: acquired selection natural selection artificial selection organic selection