What is the effect of a lack of nitrate ions on plant leaves? А All leaves turn very dark green.
B Leaves lose their yellow colour.
C The leaves wilt.
D Young leaves grow very slowly.

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

How can you approximate the number of calories required to keep you in energy balance?

Construct at least two possible hypotheses for the student’s experiment.