Biology, 25.07.2019 19:10 jojo492192
Adog breeder wishes to develop a breed that does not bark. she starts with a diverse mixture of dogs. generation after generation, she allows only the quietest dogs to breed. after 30 years of work she has a new breed of dog with interesting traits, but on average, the dogs still bark at about the same rate as other dog breeds. which of the following would be a logical explanation for her failure?
a. there is no variation for the trait (barking).
b. the tendency to bark is not a heritable trait.
c. the selection was artificial, not natural, so it did not produce evolutionary change.
d. there was no selection (differential reproductive success) related to barking behavior.
Answers: 3
Biology, 21.06.2019 16:30
Which of these statements best describes the st. lawrence seaway? the st. lawrence seaway connects the st. lawrence river with the arctic ocean. the st. lawrence seaway provides an important trading route between the u.s. and mexico. the st. lawrence seaway provides an important trading route for the u.s, but has little value for canada. the st. lawrence seaway connects the great lakes, the st. lawrence river, and the atlantic ocean.
Answers: 1
Biology, 22.06.2019 02:00
Which of the following describes a negative feedback loop? when the heart rate is too high, the body sends hormones that continually increase the heart rate higher. when a pregnant woman is in labor, the body sends hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. when blood sugar is too low, the body sends hormones that raise blood sugar until it reaches a typical level and hormone secretion slows. when a person is jogging, the body sends hormones that continually decrease the rate of oxygen supply to the legs.
Answers: 1
Biology, 22.06.2019 08:00
Drag each label to the correct location in the equation. not all tiles will be used. the density of mercury is 13.6 grams per cubic centimeter. complete the steps for converting 13.6 g/cm3 to kg/m3. (1 kg = 1,000 g, 1 m3 = 106 cm3)
Answers: 3
Adog breeder wishes to develop a breed that does not bark. she starts with a diverse mixture of dogs...
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