A(n) ____________________ is made up of a sugar, a phosphate, and a nitrogenous base. Fill in the blank(s) with the appropriate word(s)
nucleotide
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Examine the relationships between the elephants in the figure below. Which one of the following pairs is most closely related?
A) Deinotherium and Platybelodon B) Barytherium and Stegodon C) Loxodonta africana and Loxodonta cyclotis D) Mammut and Stegodon
A researcher is studying several different Rhodnius mutants. One of her mutants only molts normally up until the 2nd nymph stage. After that, insects continue to molt but keep demonstrating body plans of the 2nd nymph stage
What is the likely effect of this mutation in Rhodnius? Choose all that apply. A. The juvenile hormone is not expressed B. The ecdysone hormone is not expressed C. The prothoracicotropic hormone (PTTH) is not expressed D. The juvenile hormone is over-expressed E. The ecdysone hormone is over-expressed F. The prothoracicotropic hormone (PTTH) is over-expressed
Which process is absolutely necessary for sexual
reproduction to occur in a life cycle but is not necessarily required for organisms that only reproduce asexually? a. prokaryotic fission b. mitosis c. meiosis d. cytokinesis e. growth factor activation
Which types of phenotypic ratios are likely to occur in crosses when dealing with a single gene pair for which all the genotypic combinations are of equal viability?
A) 2:3, 1:2 B) 1:4:6:4:1, 1:1:1:1 C) 9:3:3:1, 27:9:9:9:3:3:3:1 D) 12:3:1, 9:7 E) 1:2:1, 3:1