Using a biological or scientific dictionary, or a reference in your textbook, determine the meaning of the root word psilo, and relate it to the appearance of Psilotum.
What will be an ideal response?
Psilo is derived from Greek, meaning “bare, naked” and refers to the bare appearance of the stems of Psilotum, which bear only tiny scale-like growths instead of leaves.
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Which statement is true about the structure of DNA?
A) It is a polymer made up of a string of amino acids. B) Each different sequence folds into a different three-dimensional shape. C) The two strands of a DNA molecule are held together by base pairing. D) It contains nitrogenous bases known as A, C, G, and U.
Select the correct sequence of animal
developmental events. a. fertilization >>> cleavage >>> gastrula >>> blastula b. fertilization >>> cleavage >>> blastula >>> gastrula c. fertilization >>> blastula >>> cleavage >>> gastrula d. fertilization >>> gastrula >>> blastula >>> cleavage e. fertilization >>> blastula >>> gastrula >>> cleavage
Which stage(s) show(s) the diploid portion of the
life cycle? a. A b. B c. C d. D e. D and E
Consider the question: "Why do tropical rain forests support a greater diversity of species than temperate forests?" At which level of organization would this be addressed?
A) individual B) population C) landscape D) global