Identify the type of tissue in the following: Skin, bark of tree, bone, lining of kidney tubule, vascular bundle

Which of the following describes a difference when gram-positive bacteria are compared to gram-negative bacteria?

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.

Matched chromosomes carrying information about the same characteristics in the organism are called