Which of the following statements about the big bang model is false?
a. The big bang model proposes that the universe began when a single giant star exploded
b. Scientists can estimate the age of the universe by measuring the movements of galaxies.
c. Evidence that all galaxies are moving away from one another supports the big bang model.
d. The big bang is believed to have occurred 13 to 15 billion years ago.
a
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Why do frequent moderate intensity disturbances increase species richness?
What will be an ideal response?
Which ratio would indicate that a phenotype is controlled by multiple genes?
A) 3:1 B) 2:1 C) 1:2:1 D) 9:3:3:1.
What is the order of action of these classes of genes during Drosophila development?
A) maternal effect, gap, pair rule, segment polarity B) maternal effect, gap, segment polarity, pair rule C) maternal effect, pair rule, segment polarity, gap D) maternal effect, segment polarity, gap, pair rule
An animal with a diploid number of 36 chromosomes will have ____ chromosomes in its gametes and ____
chromosomes in its somatic cells. a. 18; 18 b. 18; 36 c. 36; 18 d. 36; 36 e. 36; 72