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trapecia [35]
3 years ago
13

Which of the following best describes one way electron microscopes and light microscopes differ in structure? A) Light microscop

es use vacuum tubes instead of electron beams to concentrate light on the stage B) Electron microscopes use an infrared light source instead of a regular light to display images C) Electron microscopes use a beam of electrons instead of light to magnify images D) Light microscopes use lamps instead of electric cables as a power source
Biology
2 answers:
kow [346]3 years ago
7 0
C : <span>Electron microscopes use a beam of electrons instead of light to magnify images</span>
irina1246 [14]3 years ago
3 0
It is C) Electronic microscope use a beam of electronic instead of light to magnify images
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Two short-haired guinea pigs are mated several times. Out of 100 offspring, 25 of them have long hair. What are the probable gen
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Answer:

Ss (male) × Ss (female)

Explanation:

This question involves a single gene coding for hair length in guinea pigs. Based on the information in this question, the allele for short hair (S) is dominant over the allele for long hair (s). This means that a guinea pig will only be phenotypically long-haired if the genotype is "ss".

According to this question, Two short-haired guinea pigs are mated several times. Out of the 100 offsprings produced by this cross, 25 of them have long hair (recessive). This means that the phenotypic ratio of this cross is 3 short hair : 1 long hair i.e. 100 - 25 = 75 short hair. 75/25 = 3/1 = 3:1

To produce this phenotypic ratio, the parents must both be heterozygous (Ss) for the hair length gene.

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During the process of photosynthesis, cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen. These sugar molecules are the basis for more complex molecules made by the photosynthetic cell, such as glucose.

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