In a particular case of secondary succession, three species of wild grass all invaded a field. By the second season, a  single species dominated the field. A possible factor in this secondary succession was

#Question id: 431

#Unit 1. Molecules and their Interaction Relevant to Biology

Which is not generally a molecule used to conserve energy?

#Question id: 5430

#Unit 8. Inheritance Biology

A plant height in Maize is control by 3 pair of polygene .Two varieties of maize averaging 120 and 60 inches in height, respectively, are crossed. The F1 progeny is quite uniform averaging 40 inches in height. What is proportional of F2 progeny that is display phenotype either 120 cm or 60 cm height?

#Question id: 4569

#Unit 11. Evolution and Behavior

Which of the following must exist in a population before natural selection can act upon that population?

#Question id: 6957

#Unit 5. Developmental Biology

The effect of grafting an extra piece of notochord into a dorsal position adjacent to pre-somitic mesoderm is

#Question id: 4744

#Unit 8. Inheritance Biology

Assume that long ear lobes in humans are an autosomal dominant trait that exhibits 50% penetrance. A person who is heterozygous for long ear lobes mates with a person who is homozygous for normal ear lobes. What is the probability that their first child will have long ear lobes.