In sunflowers, tall stems (t) is a dominant trait while short stems (t) is a recessive trait. in a field of 1000 sunflowers, 820 are tall plants and 180 are short. which statement best describes the genotype of the sunflowers in the field? a) about 50% are homozygous for tall stems. b) about 75% are homozygous for tall stems. c) about 50% are homozygous for short stems. d) about 50% are heterozygous for tall stems.

The most appropriate answer would be option D.

The ratio of plants with a tall stem to plants with a short stem in roughly equals to 3:1, that is, the phenotype ratio is roughly equal to 3:1.

Thus, by Mendelian genetics, the ratio of the genotypes should be roughly equal to 1 (TT): 2 (Tt): 1 (tt).

Hence, about 50 percent of the population should be heterozygous in nature.

4.) metal

"-the movement of carbon from the nonliving environment into living things and back to the environment

-carbon is the essential component of proteins, fats, and carbohydrates (which make up all organisms)

-carbon exists in air, water, and living organisms

-producers convert carbon dioxide in the atmosphere into carbohydrates during photosynthesis

-bacteria in the atmosphere cycles through the system in filtration units

-in cellular respiration, carbon is released back into the atmosphere as carbon dioxide

-some carbon is stored in limestone (forming one of the largest "carbon sinks" on earth)

-largest carbon reservoir on earth= limestone

-carbon stored in the bodies of organisms as fat, oils, or other molecules may be released into the soil or air when the organism dies

-this may form deposits of coal, oil, or natural gas (fossil fuels, which increased the atmospheric carbon dioxide)

-fossil fuels store carbon left over from bodies of organisms that died millions of years ago

-they are located in the surface of earth, deep within the earth and beneath the ocean floor."