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krek1111 [17]
3 years ago
12

What is the definition of refraction, luminescence, and ultraviolet?

Biology
1 answer:
jeyben [28]3 years ago
5 0
Refraction- bending of light waves (ex. straw in a cup of water looks bent on a side but really is NOT, this is due to refraction, it bends the light waves reflected)

Luminescence- Creation/Emission/Starting or making of light through ways that DO NOT INVOLVE heat.

Ultraviolet- a wavelength that is part of the electromagnetic spectrum its shorter than visible light waves.
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Will you help me with 6?
Dovator [93]

Answer:

the answer maybe A or C

Explanation:

the answer maybe A or C

6 0
3 years ago
You are a botanist looking at the plant color in a new breed of Snapdragon. The two parent plants are Blue and Green and when yo
irakobra [83]

Answer:

Incomplete dominance is the inheritance pattern where the dominant allele did not mask the recessive allele completely and form a mix of both alleles. Here the inheritance is the incomplete inheritance. The ratio of F2 generation is 1:2:1.

Given:

R1R1 = 42

R2R2 = 39

R1R2 = 86

Total R1 alleles = 2*42+86 = 170

Total R2 alleles = 2*39+86 = 164

Total alleles = 334

Frequency of allele R1 = 170/334 = 0.51

Frequency of allele R2 = 164 / 334 = 0.49

Expected number of each phenotype:

Total population = 167

Blue = R1R1 = 0.51 * 0.51 * 167 = 43.44

Green = R2R2 = 0.49 * 0.49 * 167 = 40.10

Cyan = 2*R1*R2 = 2*0.51*0.49*167 = 83.46

Phenotype     Observed(O)    Expected (E)    O-E      (O-E)2     (O-E)2/E

Blue                 42                   43.44               -1.44       2.0736     0.0477

cyan                86                   83.46                 2.54     6.4516     0.0773

green              39                    40.1                    -1.1       1.2100      0.0302

Total              167                     167                                               0.1552

Chi-square value = 0.155

Degrees of freedom = no. of phenotypes – 1

Df = 3-1 = 2

Critical value = 5.99

Chi-square value of 0.155 is less than the critical value of 5.99. So we accept the null hypothesis.

4 0
3 years ago
Why salivary amylase is active in the mouth, but becomes inactive in the stomach?
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It becomes inactive in the stomach because of the stomach having a MUCH greater PH level then the mouth. It is typically 1.0-2.0 in the Stomach which is extremely acidic which causes it to change shape and therefore inactive.
3 0
3 years ago
What is a large, slow-moving rock slab that is part of Earth’s crust?
Vedmedyk [2.9K]
It is a tectonic plate, it is constantly moving and shaping the Earth's crust.
8 0
3 years ago
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A scientist is observing onion cells and human cheek cells under a microscope. Which observation does she most likely make?
saw5 [17]

The main difference between a plant cell and the animal cell is the presence of cell wall.

In the plant cell, the cell wall is present, but in the animal cell, the cell wall is absent.

Hence, in the onion cells, the cell wall around the cell would be clearly visible, whereas in the case of cheek cell, the cell would only be lined by a cell membrane, a cell wall would not be present.

Further, the plant cell would have the chloroplast, as they perform photosynthesis, but the animal cell would not have chloroplast. Unlike animal cell, the central vacuole in the plant cell is bigger and clearly visible.

8 0
3 years ago
Read 2 more answers
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