Geese are known to use the magnetic field of the Earth in navigating their twice yearly migrations. This is an example of which characteristic of life?
a. maintaining homeostasis
b. reproduction and development
c. interacting with the environment
d. organization
interacting with the environment
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Why can't mirror or direct repeats form hairpins?
What will be an ideal response?
If we apply Darwin’s theories to many characteristics that affect survival and reproduction, natural selection would
cause the populations to become more different over time, a process called ____.
a. morphological deviation b. artificial selection c. goal orientation d. evolutionary divergence e. genetic modification
Answer the following statements true (T) or false (F)
1.The theory that organisms could arise suddenly from the nonliving component chemicals was called the theory of spontaneous generation. 2.The early report that Stanley Miller had created "life in a test tube" in his prebiotic simulations was correct. 3.The enzyme that copies RNA into complementary DNA is RNA polymerase. 4.Natural selection would have favored progenotes that could use more diverse food sources. 5.The geologic timescale is divided into eons, eras, periods, and epochs defined by major geological or biological events.
Consider a chromosome with ordered loci A (A/a), B (B/b), C (C/c), D (D/d), and E (E/e) where the letters in the parentheses indicate the alleles at loci
On a chromosome in which A, C, D, and E are coupling, a new allele arises at the locus B. This new allele B, has a negative effect on fitness. As a result, we would expect: a. the genetic variation at neighboring loci to decrease. b. the alleles A, C, D, and E may be lost due to background selection. c. the alleles A, C, D, and E may be lost due to genetic hitchhiking. d. A and B. e. All of the above.