Biology, 09.04.2021 04:10, petriajack5543

A scientist shines low levels of ultraviolet radiation on a dish containing colonies of ruby-red bacteria. He then makes several replicate plates from this dish over many generations. He finds that in addition to the ruby-red color, there are also pink, orange, and yellow bacteria. Which of the following is the best explanation for these findings?
A.
One bacterial colony changed its color to better blend in to the media.
B.
Mutations occurred in the gene for color and were passed on to successive generations of bacteria.
C.
The scientist selected new types of bacteria by making plates of successive generations over time.
D.
Natural selection produced the changes in the bacterial color.

Answers: 3

Show answers

Other questions on the subject: Biology

Biology, 22.06.2019 00:30, mommatann

At which location in earth’s interior does the top density continue to increase as thickness decreases?

Answers: 1

continue

Biology, 22.06.2019 01:30, jfrjtwrg

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

Answers: 2

continue

Biology, 22.06.2019 07:00, Nicaragua505

8) animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Answers: 3

continue

Biology, 22.06.2019 09:40, OliTepley8032

80 points pls brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?

Answers: 1

continue

Do you know the correct answer?

A scientist shines low levels of ultraviolet radiation on a dish containing colonies of ruby-red bac...