Molecules that convey positional information and promote developmental changes are called _______
A. morphogens
B. determined
C. totipotent
D. apical
A
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It has been estimated that 70% of human and animal food ________ comes from seed endosperm of grain crops.
A. carbohydrate B. fat C. vitamins D. protein E. minerals
Nitrogen is important in the mutualism between legume plants and Rhizobium bacteria
Indicate whether the statement is true or false
The role of maternal effect genes in Drosophila is to:
a. code for the production of yolk proteins. b. prepare the female fly for reproduction. c. control the early stages of Drosophila development. d. control the development of the pupa. e. control the shape and size of the eggs produced.
The transition zone between biomes is called a(n) ecotone. Indicate whether the statement is true or false