Which biogeochemical cycle includes the exoskeleton and shells of marine organisms as a reservoir? A.
carbon
B.
nitrogen
C.
sulfur
D.
oxygen

(its not oxygen)

What type of competition exsist between two species. turtles and fish

Which of the following is an effect of the uneven heating of the earth by the sun? a sea breeze a land breeze a convection current all of the above

In tomato plants, mendel found that the allele for smooth seeds (s) is dominant, while the allele for wrinkled seeds (s) is recessive. which of these punnett squares shows crosses between two plants heterozygous for smooth seeds? i need this to be answered as soon as ! sry the picture is bad quality