Which of the following BEST describes what a mutation is.

A. A mutation is a change in the order of the amino acids in a protein
B. A mutation is a change in the codons of the mRNA sequence
C. A mutation is a change in the shape of the protein
D. A mutation is a change in the base sequence of DNA

Study this image. which statements best describe the rock shown? check all that apply. the grains of this rock are jagged. this rock has several coarse grains. the grains in this rock are very large. this rock has a non-banded pattern. the color of this rock is determined by its texture.

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

How do the sperm cells get from the stigma to the ovules?