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jok3333 [9.3K]
4 years ago
15

I need help with 21!! Thanksss!!

Biology
2 answers:
polet [3.4K]4 years ago
8 0
Enough sand for forming islands, the<span> sea level is rising and there are wind and waves with enough energy to move the sand.</span>
Cloud [144]4 years ago
5 0
In order for a barrier island to form, the coastal sand is organized into barrier islands. There are three conditions for an Island of this type to form. 
1. There must be a sufficient supply of sand to form the island.
2. The sea level must be rising.
3. There needs to be winds and waves with sufficient energy to move the sand around

Hope that helps
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Alleles resistant to organophosphate insecticides first appeared in Asia and were introduced into mosquito populations in the Un
timofeeve [1]
<h2>Mutation & genetic drift</h2>

Explanation:

  • A mutation is characterized as a lasting change to the DNA succession in a quality. This change moves the hereditary message conveyed by the quality and can modify the amino corrosive arrangement of the protein the quality encodes. This implies future cells created by the quality will just convey a specific characteristic.  
  • Genetic Drift is the change in the hereditary structure of a populace after some time because of possibility or irregular occasions. In instances of hereditary float, for example, catastrophic events or periods of irregular climate, the age that makes due to repeat won't really be the fittest, yet the most fortunate. Hereditary float doesn't allude to a particular change in hereditary cells, rather to arbitrary events that impact a population's genetic makeup.
  • Hence, the right answer of the fill up the blank is "mutation and genetic drift".

5 0
4 years ago
Oxidation of lactic acid into pyruvic acid involves (1) coenzymes donating hydrogen atoms to lactic acid.(2) a gain of potential
vazorg [7]

Answer:

The correct answer is option 3. removal of hydrogen atoms from lactic acid.

Explanation:

In anaerobic conditions, it ferments to generate lactic acid. It is two way or reversible process in which oxidation of lactic acid produces pyruvic acid and NADH.

This process involves the removal of hydrogen atoms from the lactic acid and produces NADH and H⁺ in the presence of lactate dehydrogenase enzyme and convert into pyruvic acid.

Thus, the correct answer is option 3. removal of the hydrogen atoms from lactic acid.

4 0
3 years ago
17. Phenytoin is used to treat<br> A. seizures.<br> B. meningitis.<br> C. depression.<br> D. stroke.
Oksi-84 [34.3K]

Answer:

A

Explanation:

5 0
3 years ago
Read 2 more answers
If you count 52 purple rough corn kernels and 50 yellow smooth corn kernels how many people smooth corn kernels should you expec
Vitek1552 [10]

Answer:

17

Explanation:

In corn,

Smooth kernel (S) is dominant to rough kernel (s)

Purple kernel (P) is dominant to yellow kernel (p)

Since no information has been given about the cross here let us assume it to be a standard dihybrid cross.

The phenotypic ratio of dihybrid cross is 9:3:3:1. 9/16 will show dominant phenotype for both traits, 3/16 will show dominant phenotype for one trait, other 3/16 will show dominant phenotype for the second trait, 1/16 will have recessive phenotype for both the traits.

Here,

Purple rough (P_ss) = 52

Yellow smooth (ppS_) = 50

Both of them show dominant phenotype for one trait so they each form 3/16 of the progeny.

If the total progeny was z, 3/16*z = 50

z = (50*16)/3 = 267

Total progeny = 267 kernels

Yellow rough kernels (ppss) = (1/16*267) = 17

So approximately 17 corn kernels will be yellow and rough.

8 0
3 years ago
Which of the following solutions would have the lowest freezing point? 1.0 M NaCl, 3.0 M NaCl, 2.0 M NaCl, 2.0 M NaCl, 0.5 M NaC
Nady [450]
0.5 NaCI or 1.0 NaCI
8 0
3 years ago
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