Select all the following that are TRUE when describing the differenct between DNA and RNA: A. RNA contains the sugar ribose and DNA contains the sugar deoxyribose

B. DNA and RNA both contain the nitrogenous base Guanine

C. RNA is double stranded whereas DNA is single stranded

D. DNA and RNA are both made up of nucleotides

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The following image is of a diatom. it lives in water and gets food from photosynthesis. it is encased in a hard shell made of something similar to glass or sand . a diatom is a(n) because it has a) multi-celled organism; specialized parts. b) vertebrate; a skeleton. c) insect; an exoskeleton. d) single-called organism; only one cell.

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4