A typical adult male?

a. produces sperm up to about 65 years old.

b. produces sperm during a monthly cycle.

c. is born with all the sperm he will ever produce.

d. produces several hundred million sperms each day

A wider section of a river with high diversity A. littoral zone B. limnetic zone C. profundal zone D. midriver E. mouth

Which is of the following is an organic molecule? A. CH4 B. NaCl C. FeO D. H20

A carbohydrate molecule is ... ?

How does elephant get its source os nitrogen to form its DNA or proteins like collagen?

Which of these might be used to determine common ancestry of two different species of animal A. Fossil evidence B. similar habitats C. similar ecological niches D. The size of the population

Are there any organisms that do not have tissue structures? Yes or no?

How does the wavelength of a G-note sound wave compare to the wavelength of an A-note sound wave? A. The G-note's wavelength is longer. B. There is not enough information to tell. C. The G-note's wavelength is the same size. D.

How to remember the different prokaryotic and eukaryotic

With every transfer of energy through the energy pyramid, the quantity of energy decreases. Which law of thermodynamics supports this fact? A. both laws B. first law C. second law

What are the four components necessary for a plant to perform photosynthesis? a. chloroplasts, sunlight, carbon dioxide, and water b. ribosomes, seasons, carbon dioxide, and dew c. ribosomes, sunlight, oxygen, and water d.