They are little soft bodied insect. They suck the plant's nutritious liquid and if they are in large number, they can kill the plants.
The correct answer is b, photosynthesis.
The question is; would a drug that binds irreversibly to these receptors be an effective contraceptive in mammals?, the answer is;Yes; because if the receptors are blocked the sperms will not be able to penetrate the zonal pellucida of the egg. Contraceptives prevents pregnancy by interfering with the normal process of ovulation, fertilization, and implantation.
Answer:
C. Geothermal
<em>I Hope im correct ^^</em>
