百分百英语›考研英语完形填空真题库›2022年英语一 完形填空
The idea that plants have some degree of consciousness first took root in the early 2000s; the term "plant neurobiology" was (1) around the notion that some aspects of plant behavior could be (2) to intelligence in animals. (3) plants lack brains, the firing of electrical signals in their stems and leaves nonetheless triggered responses that (4) consciousness, researchers previously reported.
But such an idea is untrue, according to a new opinion article. Plant biology is complex and fascinating, but it (5) so greatly from that of animals that so-called (6) of plants' intelligence is inconclusive, the authors wrote.
Beginning in 2006, some scientists have (7) that plants possess neuron-like cells that interact with hormones and neurotransmitters, (8) "a plant nervous system, (9) to that in animals," said lead study author Lincoln Taiz. "They (10) claimed that plants have 'brain-like command centers' at their root tips."
This (11) makes sense if you simplify the workings of a complex brain, (12) it to an array of electrical pulses; cells in plants also communicate through electrical signals. , (13) the signaling in a plant is only (14) similar to the firing in a complex animal brain, which is more than "a mass of cells that communicate by electricity," Taiz said.
"For consciousness to evolve, a brain with a threshold (15) of complexity and capacity is required," he (16) . "Since plants don't have nervous systems, the (17) that they have consciousness are effectively zero."
And what's so great about consciousness, anyway? Plants can't run away from , (18) so investing energy in a body system which (19) a threat and can feel pain would be a very (20) evolutionary strategy, according to the article.
答案速查：1.A 2.C 3.D 4.C 5.D 6.B 7.C 8.B 9.A 10.D 11.C 12.B 13.A 14.C 15.B 16.D 17.A 18.A 19.D 20.B
1. the term "plant neurobiology" was
答案：A
2. some aspects of plant behavior could be
答案：C
3. plants lack brains, the firing of electrical signals in their stems and leaves nonetheless triggered responses that
答案：D
4. the firing of electrical signals in their stems and leaves nonetheless triggered responses that
答案：C
5. Plant biology is complex and fascinating, but it
答案：D
6. so-called
答案：B
7. some scientists have
答案：C
8. interact with hormones and neurotransmitters,
答案：B
9. "a plant nervous system,
答案：A
10. They
答案：D
11. This
答案：C
12. if you simplify the workings of a complex brain,
答案：B
13. the signaling in a plant is only
答案：A
14. the signaling in a plant is only
答案：C
15. a brain with a threshold
答案：B
16. is required," he
答案：D
17. the
答案：A
18. Plants can't run away from
答案：A
19. a body system which
答案：D
20. would be a very
答案：B