In a dihybrid cross, a pure-bred purple elongate radish variety was crossed with a pure-bred white round radish variety. All F1 radishes were purple and elongate. When F1 plants were selfed, the F2 population showed the following phenotypes; 90 purple elongate : 29 white round. How would you explain this segregation ratio?

Why is excretion necessary to maintain homeostasis?

Which statement best describes lactic acid fermentation? a. lactic acid fermentation is the first step of cellular respiration. o b. lactic acid fermentation is the final step of cellular respiration. re to berate c. in the absence of oxygen, cells release atp by breaking down lactose into glucose. e der lade res o d. in the absence of oxygen, cells release atp by breaking down glucose into lactate. ar

The pharynx is the structure in the body that serves as a pathway of both air and food. how does the body make sure that food does not get into the lungs? the salivary glands secrete enzymes that pull food out of the air pathway. the small intestine pushes the air out of the digestive system. the pancreas breaks down food in the air pathway. the epiglottis closes the air pathway so that food will not enter it.