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scZoUnD [109]
3 years ago
7

Explain the difference between crossing over and genetic variation

Biology
1 answer:
Sophie [7]3 years ago
8 0

crossing over is the exchange of two homologous chromosomes resulting in a mixture of parental characteristics in offspring while genetic variation is brought out through genetic mutations.

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Hopefully you are getting the picture that science is a dynamic process, always changing as new information arises. Any individu
kondaur [170]

Experimentation and data collection provides solution to certain problems. It helps to solve an hypothesis formulated providing results and serve as guide for further experiments.

1. A scientific hypothesis is best described as an "educated guess." - False

2. Failure to disprove a hypothesis proves that the hypothesis is correct.- False

3. Scientific theories are never questioned.- False

4. A scientific theory is based on educated guesses and is not backed up by facts/data.-False

5. Scientists that contribute data that contradicts an established theory are not highly regarded in the scientific community.- False

7. Scientific facts are never questioned.-False

The True

6. In order for an investigation to be considered scientific, a controlled experiment must be used.- True

A control serves as a guide in an experiment as the experimental variable is tested with it to see the possible changes or outcome.

8. Science can only answer questions about things that can be seen and observed.- True

Science provides solutions to problem that have been identified, for which data are generated in respect to the problem identified and solutions are provided.

9. Untestable hypotheses fall outside the realm of scientific inquiry -True

An hypothesis should be testable, it is the problem statement that requires a solution.

7 0
3 years ago
5. What is the critical distinction between allopolyploidy and autopolyploidy?
Jet001 [13]

Answer:

D. In autopolyploidy, one parental species contributes to the polyploidy; in allopolyploidy, two parental species contribute to the polyploidy.

Explanation:

Autopolyploidy is the polyploidy that arises when the organisms have more than two complete sets of the same genome. For example, if a diploid species is represented as "AA", its autopolyploid with four complete sets of the genome can be represented as "AAAA".

On the other hand, allopolyploidy occurs when the polyploid carries more than two complete sets of the genome from separate species. For example, if two diploid species are represented as "AA" and "BB", their allopolyploid with four complete sets of the genome can be represented as "AABB".

8 0
4 years ago
1. What happens to our body when we are exposed to temperature extremes? What do we do to control our internal temperature?
BARSIC [14]

Explanation:

when we are in heat our body companciates with surrounding by profusely sweating

we can control our internal temperature by escape in time from heat and

5 0
3 years ago
What is the problem with letting governments regulate access to water such as the opening of the brewery by Constellation Brands
saul85 [17]

Answer:

Government says it won't grant a water-supply permit to the company ... whether to let U.S. company Constellation Brands open a brewery in Mexicali. ... The cancellation of such a large project sends a negative signal to foreign

Explanation:

8 0
3 years ago
Why are thick or dense smears less likely to provide a good smear preparation for microscopic.
stira [4]

Thick or dense smears less likely to provide a good smear preparation for microscopic because it will diminish the amount of light that can pass through making it difficult to visualize the morphology of single cells under the microscope. Some times the stain can't penetrate all of the bacteria.

<h3 /><h3>What is a microscopic smear?</h3>
  • A smear is a microscopic specimen.
  • A swab or loop, or the edge of another slide, is used to spread the sample to be examined, such as blood or microbial culture, thinly and unevenly across the slide.
  • Smear preparation involves spreading a small amount of sample on a slide and air drying the film before staining and microscopy.
  • The conventional method, blood film method, drop and rest method, and water-wash method are the four types of smearing methods.
  • Smear microscopy entails collecting a biological sample (typically sputum or other clinical material), fixing it thinly on a glass slide, and staining it with a dye that binds specifically to mycobacteria (making them easier to identify under a microscope).

To learn more about microscopic smear :

brainly.com/question/24936837

#SPJ4

7 0
1 year ago
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