Biology, 11.10.2019 17:50 miraclewhipppp

What did john needham conclude from his test of redi's findings?

Answers: 1

Show answers

Answers

Answer from: jude3412

He claimed that spontaneous generation could could occur under the right conditions.

Answer from: Emptypockets451

Spontaneous generation is possible under right conditions

Explanation:

According to theory of spontaneous generation living organisms could originate from non living matter for example mice from corn, maggots from meat etc. Redi worked to disprove the theory of spontaneous generation. He placed meat in two containers and covered only one with a gauze. Maggots were observed only in the uncovered container. So non living matter could not produce living matter and they had to come from an external source.

John Needham believed that Redi did not provide right conditions in his experiment hence he could not observe maggots in the second container. He boiled some broth to kill all preexisting microbes, filled a bottle with it and sealed it. Despite that he observed living organisms some days later in broth and concluded that life can actually originate from non living things. In reality, he did not boil the broth enough to kill all the preexisting microorganisms.

Answer from: Quest

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.

Answer from: Quest

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

Another question on Biology

Biology, 22.06.2019 01:00

Which represents a negative impact of technology

Answers: 1

Answer

Biology, 22.06.2019 02:30

Plz ! for many generations farmers in north america have been choosing to cross corn plants with large ears of corn each year this results in the new generation of plants also growing large ears of corn. what is the technique called? a. selective breeding. b. natural selection. c. mitosis. d. asexual budding.

Answers: 1

Answer

Biology, 22.06.2019 03:30

Which statement best describes a typical difference that could be found between the "analysis" and "conclusion" sections of a lab report? a) only the "conclusion" describes errors that occurred during the experiment, and only the "analysis" section suggests further research.b) only the "analysis" section includes specific data comparisons, and only the "conclusion" section suggests further research.c) only the "analysis" section discusses whether the original hypothesis was supported, and both sections include graphs of data.d) only the "conclusion section discusses whether the original hypothesis was supported, and both sections suggest further research.(the answer is b i just took the test)

Answers: 1

Answer

Biology, 22.06.2019 09:30

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?