Which of the following substances contained the most catalase?
question 1 options:
a. chalk
b. potato
c. leaves
d. liver

Select all the true statements about the cosmic microwave background radiation

Aresearcher has developed two stains for use with seed plants. one stains sporophyte tissue blue; the other stains gametophyte tissue red. if the researcher exposes pollen grains to both stains, and then rinses away the excess stain, what should occur? a) the pollen grains will be pure red.b) the pollen grains will be pure blue.c) the pollen grains will have red interiors and blue exteriors.d) the pollen grains will have blue interiors and red exteriors.

Describe the response the kidneys have to dehydration and excessive water intake. what happens to the concentration of urine in each case ?