Explain why males have deeper voices than females

A horse has 64 chromosomes and a donkey has 62 chromosomes. A cross between a female horse and a male donkey produces a mule, which is usually sterile.

Which structure has functions in both the respitory system and the digestive system

Which organelle prepares protiens to be fully functional?

Which type of plant reproduces using seed cones?

The whitefish slide is from a blastula, an early stage in embryonic development. why do you think that this sample was chosen rather than a sample of adult tissue?

How could you differentiate a bubble from true specimen?

I am doing a project on Down Syndrome and my teacher told us that we have to include information on the mode. What is the mode? I only know of the math mode.

Radiation can cause breaks in human chromosomes. However, insects can survive much higher lecels of exposure. Why?

Salt water is an abundant resource but unusable for irrigation and drinking. As demands on freshwater sources increase, the use of desalination processes to remove salt from ocean water is increasing.

When does a girl normally go through puberty? living environment