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maria [59]
3 years ago
12

Which is a difference between a compound light microscope and a scanning electron microscope? A: the scanning electron microscop

e can view the internal part of a cell, while the compound light microscope views the surface of a cell. B: The scanning electron microscope specimens can be stained for contrast, while the compound light microscope specimen appears black and white. C: the scanning electron microscope is used for dissections, while the compound light microscope is not. D: The scanning electron microscope uses an electron beam and a layer of gold to view the surface of the cell, while the compound light microscope uses light and lenses.
Biology
2 answers:
slega [8]3 years ago
6 0

Answer:

D

Explanation:

kati45 [8]3 years ago
5 0

Answer:

The correct answer is D.

Explanation:

Because the scanning electron microscope uses an electron beam instead of a light beam to form an image, and the compound microscope uses lens and light.

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Which variable should be changed in an experiment to test the best conditions for bacteria to grow? the type of bacteria used th
Setler [38]

An experiment to test the best conditions for bacteria to grow is the material that the bacteria feed upon. <u>Option D.</u>

<u />

Antibacterial hand soap with different concentrations. Dependent variable bacterial growth as measured by the diameter of the zone of inhibition. Exposing Petri dishes to different temperatures can skew the level of bacterial growth they inhabit. Plant height is the dependent variable that responds to changes in the independent variable.

Sunlight is the controlling variable because each plant is exposed to the same amount of sunlight. It is the dependent variable because it measures the amount of plant growth. The dependent variable depends on the independent variable. How much plants grow depends on how much sun they receive. A continuous increase in temperature from a minimum value increases the rate of bacterial growth because the rate of metabolic reactions increases with increasing temperature.

Learn more about An experiment here:- brainly.com/question/17274244

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7 0
1 year ago
Dna microarrays allow the rapid and simultaneous _____ of many thousands of genes. g
sammy [17]
DNA microarrays allow the rapid and simultaneously SCREENING of many thousands of genes.
8 0
2 years ago
Drosophila melanogaster (select all that apply): Group of answer choices Have the significant disadvantage of a multiple-month l
vovikov84 [41]

Answer:

Contains large polytene chromosome that permit visual inspection of genomic events.

Were used to study the genetic effects of mutations.

Were used to establish the concept of chromosomal inheritance.

Explanation:

<em>Drosophila melanogaster </em>is a model organism that is used by scientists to study the genes and effect of a mutation on the genes. Drosophila is used as a model organism as it has a very short life cycle and the offspring can be produced in a short duration of time.

Because of these characteristics, Thomas Hunt Morgan wanted to study the factors of inheritance on the <em>Drosophila</em> and concluded in the form of the chromosomal theory of inheritance by the effect of mutation on genes that lead to linkage mapping.

Also, the salivary gland of fruit fly contains the polytene chromosome which allows us to look into the gene events.

Thus, the selected options are correct.

8 0
3 years ago
In a field of sunflower plants, 776 plants are tall and 224 plants are short. Sunflower height follows the normal pattern of inh
Nitella [24]

Answer:

The correct answer would be D) tt.

Recessive traits need a homozygous condition to get expressed and to produce a particular phenotype. In contrast, dominant trait can be expressed  in homozygous as well as heterozygous condition of the alleles of a gene.

Now, shortness is a recessive trait encoded by allele "t". Hence, allele "t" must be present in the homozygous condition in order to make the plant short.

Thus, the genotype of all the short plants in the field should be tt and the genotype of the tall plants would be TT or Tt.

4 0
2 years ago
Read 2 more answers
Two positively charged objects (Object A and Object B) are 8 inches apart. When a positively charged ball is hung at an equal di
dimaraw [331]

Answer:

Object B has more charge than Object A

Explanation:

Generally, unlike charges attract each other and like charges repel each other but it happens in a very rare case when like charges attract each other. It is so due to charge difference between the objects.

In the given example a positively charged ball moves towards positively charged object B because object B has more charge than object A and the ball. Due to large difference in the charges between two positive charges, positive charges are displaced at opposite end and object B get concentrated with negative charges that allows ball to move towards Object B.

Hence, the correct answer is "Object B has more charge than Object A".

3 0
3 years ago
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