Which of the following is an example of a scientific question?
a) does adding sugar to water keep flowers fresh
b) do cats make better pets than dogs
c) are friendly people on time more often than unfriendly people
d) which flowers are prettier, daisies or roses
Ans: a) does adding sugar to water keep flowers fresh
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In plants and animals, the zygote develops by which of the following processes?
A. mitosis B. meiosis C. syngamy D. synapsis E. reduction division
Select the that best matches each factor .
A) catalyzes formation of peptide bonds B) UUU C) contains information in the form of anticodons D) binds to Pribnow box E) catalyzes disassembly of the translation complex F) involved in transcription G) associated with the binding of mRNA in the ribosome H) catalyzes disassembly of the transcription complex I) involved in replication J) catalyzes translocation of the ribosome K) binds to Shine–Delgarno sequence L) catalyzes the formation of amino acid-AMP M) AUG N) associated with the binding of tRNA in the ribosome O) UAG 1) start codon 2) 30S ribosomal subunit 3) tRNA 4) peptidyl transferase 5) aminoacyl-tRNA synthetase 6) release factor 7) stop codon 8) elongation factor G 9) 16S rRNA 10) RNA polymerase
A cell that can divide to give rise to any cell type, including those of membranes that support the developing embryo, is
A) multipotent. B) a progenitor cell. C) a differentiated cell. D) totipotent.
Which of the following statements is NOT true about
the reproductive behavior of voles? a. Oxytocin induces monogamy in female prairie voles. b. Monogamous species have fewer oxytocin receptors than promiscuous species. c. ADH receptors in the brain play a role in monogamy. d. Mountain voles are more promiscuous than prairie voles. e. Male meadow voles are not monogamous.