How many sperm cells is produce by a male plant?
Topics:Psychology Oral Hygiene Human Brain Diseases of The Body Systems Asthma Microbes and Infectious Disease The nervous system & brain Cell Bio Balanced Diet Genetics: Viruses and Bacteria Advanced Stretching SM2 Urinary Human Digestive System Blood Donation 5 Major Food Groups
Other quiz: Respiration, Immune System, Blood Cells
What happens to breathing and heart rate during exercise?
A. Breathing rate increases and heart rate decreases
B. They both increase
C. They both decrease