Meerkats are small desert mammals that live in groups of 20–50 animals. You observe the behavior of a group of meerkats. Which of the following behaviors would you categorize as examples of reciprocal altruism?
A. Two meerkats take turns grooming each
other, each spending about the same amount
of time grooming the other.
B. One meerkat grooms a second meerkat,
who is sleeping.
C. One meerkat spends time standing upright
on a stump, looking around, while other
meerkats forage for food.
D. One meerkat spends time sleeping in the
burrow after eating, while other meerkats
forage for food.
E. One meerkat stands in the sun, while the
other spends time digging out the burrow.
A
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Which of the following statements about probes used in hybridization methods are true?
A. The probe could be a gene from another species. B. They are usually radiolabelled or conjugated with a fluorescent tag so they can be visualized. C. They can be synthetic DNA sequences based on known amino acid sequences. D. They can be based on DNA sequence information from a sequence database. E. All of these statements about hybridization probes are true.
Hydrogen bonds in water collectively exert a continuous pull on its individual molecules. Therefore, water molecules resist separating from each other. This property is called:
a. ionic bonding b. solvency c. polarity d. hydrophilic tension e. cohesion
Four of the five answers listed below are
related by being plant gender specific. Select the EXCEPTION.
a. carpel b. ovary c. stamen d. style e. stigma
List four possible reasons that explain the importance of introns
What will be an ideal response?