Which of the following is present in all chordates?
A) A notochord
B) An external skeleton
C) A vertebral column
D) Chloroplasts
E) Four limbs
A
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The plant hormone ____ is apparently synthesized from carotenoid pigments inside plastids
a. salicylic acid b. cytokinin c. abscisic acid d. jasmonate e. brassinosteroid
Each day, a bean plant holds its leaves horizontally during the day but folds them close to its stem at night. This is an example of:
a. photoperiodism b. vernalization c. circadian rhythm d. phytochromatic pattern e. systemic acquired rhythm
Transgenic mice carrying a mutant human SOD1 gene are used as models to study
____________________. Fill in the blank(s) with the appropriate word(s).
A metabolic reaction requires 10 units of enzymatic activity to proceed. If a dominant allele D can generate 8 units of enzyme and a recessive allele d can generate 2 units of enzyme, what can be said of the dominant wild-type allele?
What will be an ideal response?