The absence of which substance causes a switch from aerobic to anaerobic respiratory

The allele for curly hair is incompletely dominant. if a mother is homozygous for curly hair and the father is homozygous for straight hair, what percentage of the offspring will exhibit characteristics of both parents? 25 percent 50 percent 75 percent 100 percent

During which phase does earth see more than half of the moon's surface? 1)first quarter2)third quarter3)waxing gibbous4)waning crescent

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs