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
Answer: C) Loxodonta africana and Loxodonta cyclotis
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The forelimb of a bat and the forelimb of a bird are examples of structures.
A. homeotic B. analogous C. homologous D. vestigial E. heterologous
How do steroid hormones differ from those derived from amino acids?
a. steroid hormones are not derived from organic molecules b. steroid hormones do not bind to plasma membrane receptors c. steroid hormones use a second messenger system
d. steroid hormones do not travel in the blood e. steroid hormones do not require receptors to function
Describe how microtubules and cohesion work together to align the chromosomes along the metaphase plate during the process of sister chromatid cohesion
What will be an ideal response?
The tertiary structure of proteins is typified by the:a
association of several polypeptide chains by weak bonds. b. order in which amino acids are joined in a peptide chain. c. bonding of two amino acids to form a dipeptide. d. folding of a peptide chain to form an alpha helix. e. three-dimensional shape of an individual polypeptide chain