Which one of the following is considered to be an important plant hormone that helps plants cope with environmental stresses?
A. Auxins.B.
Prostaglandins.
C. Ethylene.
D. Abscisic acid.
E. Cytokinins.
D. Abscisic acid.
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Which of the following is a characteristic of temperate forests?
a. deciduous trees b. evergreen conifers c. infrequent precipitation d. diversity of tree species
Which of the following is NOT commonly used to describe a community?
a. species richness b. relative abundance c. species diversity d. dominant species e. trophic abundance
Ribosomal subunits
a. come together in threes to form functional units. b. are composed of mRNA and structural proteins. c. are synthesized in the cytoplasm. d. converge only when mRNA is to be translated. e. are transcribed from the complementary strand of DNA that is used for tRNA transcription.
In humans, normal skin pigmentation is influenced by a dominant gene (C) which allows pigmentation
to develop. All individuals who are homozygous for the recessive allele (c) are unable to produce an enzyme needed for melanin formation and are therefore referred to as albino. Two normal parents produce an albino child. What are the chances that the next child will be an albino? What will be an ideal response?