Not all enzymes work inside cells in the body. ………………… enzymes are produced by specialized cells in the pancreas and digestive tract

Which organism is the producer in this food web? 7th grade question. a) arthropods b) birds c) fungi d) plants

1. describe the structure and function of the specialized cells you observed in the video. 2. research the types of cells present in the kidney.

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.