What is the difference between Partially submerged, and Free floating aquatic plants.

The organelle pictured is found in cells of and is theorized to have once been an independent organism.

What is turgor pressure, what causes it, and what does it do for a plant?

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?