Q3. A student investigates factors that affect photosynthesis. (a) In his first experiment, the student uses this method to investigate the effect of light on photosynthesis. place a plant in the dark for 24 hours cover part of leaf X with black paper place the plant in the light for 24 hours The diagram shows the plant in the light.

Which is the best way to define a common in environmental science a. a worthless resource b. shared resource c. a rare resource d. a typical resource

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

What materials must dams have to produce electricity, and what must occur?