4. Which best explains how meiosis is a contributing factor to genetic variation within a species? A) Meiosis reduces the number of mutations within an organism
B) Meiosis produces daughter cells that will contain identical chromosomes
C) Meiosis results in offspring that contain alleles from only one parent gamete
D) Meiosis allows for crossing over of chromosomes, resulting in new gene combinations

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.

In what part of the body does the most muscle activity happen?

Fill in the blank with the best word to complete the sentence. white blood cells protect against and aid in blood clotting when injuries are sustained.