Covalent network solids such as graphite, quartz, and diamond are all made entirely of carbon atoms
are held together by ionic bonds
have very high melting and boiling points
are soft and slippery

Fan egg cell containing the (n+1) number of chromosomes combines with a sperm cell containing the (n) number of chromosomes, what is the result of this union? a) all future somatic cells of the organism will contain the (2n + 1) number of chromosomes. b) all future somatic cells of the organism will contain the (2n - 1) number of chromosomes. c) only certain somatic cells of the organism will contain the (2n + 1) number of chromosomes. d) all future somatic cells of the organism will contain the normal diploid number of chromosomes.

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

Which direction does the energy flow in this energy pyramid ?