What kind of organisms must have lived on Earth first?

When examining cells in the lab you noticed a particular tissue sample is 45% of the cells in the mitotic phase how do you explain this observation

Which describes a community most accurately

If your skin is punctured, it will protect your body from infection by A) becoming immune. B) producing a fever. C) becoming inflamed. D) producing antibodies.

You are studying a eukaryotic gene whose initial transcript is 1500 nucleotides in length. The mature mRNA derived from the gene is 1200 nucleotides in length.

Explain the term "trophic cascade"

In which order do the necessary enzymes act to repair a thymine dimer by nucleotide excision repair? a) nuclease, dna polymerase, rna primaseb) helicase, dna polymerase, dna ligasec) dna ligase, nuclease, helicased) dna polymerase, rna polymerase,

Scientist infer that the Big Bang occurred approximately?

What is the entire group of accounts maintained by a company called?

Which of these is not true of enzymes? a. enzymes speed up reactions in cells. b. enzymes work the same at all temperatures. c. enzymes work only in a relatively narrow ph range. d. enzymes work on specific chemicals?

How is breathing related to cell respiration? (Hint: Think about both the reactants and the products of cellular respiration)