Biology, 19.09.2019 11:30 paulesparsa6
populations change naturally over time. which mechanism is a method of artificial selection rather than natural selection?
a) genetic drift
b) natural selection
c) selective breeding
d) geographic isolation
Answers: 1
Biology, 21.06.2019 19:00
Which of the following structures is not found in both plant and animal cells? a) chloroplast b) cytoskeleton c) ribosomes d) mitochondria
Answers: 2
Biology, 21.06.2019 22:00
Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.
Answers: 1
Biology, 22.06.2019 09:30
Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.
Answers: 1
Biology, 22.06.2019 10:50
Which type of transport is responsible for oxygen entering into blood cells? a. vesicle b.passive c. facilitated d.active b.passive
Answers: 2
populations change naturally over time. which mechanism is a method of artificial selection rather t...
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