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elena-14-01-66 [18.8K]
3 years ago
12

What air pollutants causes a reddish-brown haze in the sky?

Biology
1 answer:
Mars2501 [29]3 years ago
7 0

Answer: Nitrogen dioxide

Explanation:

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The part of the eye that closes and opens to let light in is the________ .
irga5000 [103]

Hello There!

This is called the "IRIS"

The iris is the colored part of they eye and it's responsible for focusing light onto the cornea.

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3 years ago
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If the frequency of an allele is 0.75, how many copies of this allele should be in a population of 300 diploid individuals?
Ray Of Light [21]

I have provided the options below:

a. 150

b. 225

c. 300

d. 450

e. 75

Answer:

150

Explanation:

Hardy-Weinberg law states, the allelic frequencies of a gene that is, q and p follow the relationship p^2+q^2+2pq = 1, if the population is in equilibrium.

Therefore p^2+q^2+2pq = 1, can be used to calculate the percentage of the allelic frequencies i.e. p^2 and q^2

Allelic frequency = 0.75.

Therefore, the percentage of the allele in the population would be given by

0.75^2 = 0.5625 = 56%.

And the total number of individuals with this allele in the population:

number of individuals = 56×300÷100

= 168 or

150 nearest figure.

8 0
4 years ago
Which type of growth can occur only when a population has unlimited resources?
tigry1 [53]
C. Exponential growth occurs when there is unlimited resources. Since there is a surplus of food, there are a lot more babies are born because of the favorable circumstances.

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6 0
3 years ago
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You would predict that indoleacetic acid, a plant hormone, would have a(n):__________
marissa [1.9K]

You would predict that indoleacetic acid, a plant hormone, would have is a Auxin.

A chemical known as indoleacetic acid (IAA) is produced by plants and a few microorganisms (3, 4). IAA is important for both root and shoot growth in plants. By means of an efflux pump (PIN1-7) and a specified importer (AUX1), the hormone travels from one area of the plant to another (5, 6).

Auxin mainly help in complex mechanism of a plant , which lead many metabolic activities in plant .

What is Auxin ?

  • Auxin plays a crucial role in controlling plant growth and development by regulating embryonic development, root and stem tropisms, apical dominance, and the transition to blooming.
  • It is used to start off shoot growth in culture and encourages lateral and accidental shoot growth.
  • Aids in overcoming auxin-induced apical dominance.
  • Encourage the development of leaves' chloroplasts.
  • Encourages the mobilization of nutrients and delays leaf senescence.

To learn more about Auxin visit :

brainly.com/question/16939476

#SPJ4

5 0
2 years ago
medical professionals wear lead aprons to protect them self’s from x rays because prolonged or repeated exposure can cause mutat
uranmaximum [27]
Cancer or any number of other genetic mutations like diabetes, birth defects, etc.
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