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Leto [7]
3 years ago
12

Explain why it was important to keep on set of seedling in the light​

Biology
1 answer:
Eduardwww [97]3 years ago
4 0

Answer:

Among all the factors necessary for the growth of a plant, light comes first. Without it, we will hardly grow any plant, especially vegetables that need much more energy to develop fruits. It is precisely the lack of natural lighting that is one of the most common problems urban gardeners encounter when growing vegetables.

Explanation:

The lack of light cannot be solved naturally, but by using artificial lighting. By using artificial lighting we can completely eliminate the problem of lack of natural light, but also allow some flexibility when positioning seedling. Depending on which climate they come from, edible plants can be classified into two groups - sun plants and shade plants.

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Mitosis cannot occur until the genetic material inside of a cell has been copied. where in the cell is this genetic material loc
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In the nucleus of the cell, there are chromosomes that contain genetic material
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Which of the following most significantly determines a community's access to potable water?
Solnce55 [7]

Answer:

<em>The correct option is B) the availability of money</em>

Explanation:

Potable water can be described as the water which is safe to drink. Nowadays, with the rapid industrialization progress, it is important to process water so that it can be used for human consumption. The processing of water to make it clean enough requires money. The more money a community will have, the more machinery and plants it will be able to set up for the processing of water.  

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3 years ago
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Consider a cross between a plant with two flower colors, yellow and red. Yellow (Y) exhibits complete dominance over red (y). It
Aneli [31]

Answer:

1) option a is correct. (260+270)/1545

<em>(Note about this option: In the statement, it is written as </em><em>(260+270) 1545. </em><em>Lacks the division symbol, </em><em>/ </em><em>)</em>

2) From these results one can conclude that the two genes are linked (option a)

Explanation:

To know if two genes are linked, we must observe the progeny distribution. If heterozygous individuals, whose genes assort independently, are test crossed, they produce a progeny with equal phenotypic frequencies 1:1:1:1. If we observe a different distribution, phenotypes appearing in different proportions, we can assume linked genes in the double heterozygote parent.  

We might verify which are the recombinant gametes produced by the di-hybrid, and we will be able to recognize them by looking at the phenotypes with lower frequencies in the progeny. Phenotypes with the highest frequencies represent the parental gametes.

To calculate the recombination frequency, we will use the following formula: P = Recombinant number / Total of individuals.  

In the present example:

Parental)        YySs                        x                 yyss

Gametes)  YS parental type                        ys, ys, ys, ys

                 ys parental type

                 Ys recombinant type

                 yS recombinante type

The total number of individuals in the offspring: 1545

Phenotypic class Number of offspring  

  • 500 Y-S- (parental)
  • 515 yyss (parental)
  • 260 Y-ss (recombinant)
  • 270 yyS- (recombinant)

According to this information, the phenotypic frequencies of the progeny differ from the phenotypic ratio 1:1:1:1. We can assume then, that t<u>hese genes are linked. </u>

The recombination frequency is:

P = Recombinant number / Total of individuals

P = 260 + 270 / 1545

P = 530/1545

P = 0.343

The genetic distance between genes is 0.343 x 100= 34.4 MU.

6 0
3 years ago
The chemical structure of a carbohydrate contains repeating units of molecules composed of carbon, hydrogen, and oxygen atoms. W
pochemuha

Answer:

D. sugars

Explanation:

monosaccharides disaccharides polysaccharides blah blah blah sugar made from photosynthesis sugar is carbohydrate blah blah blah

6 0
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Compare the roles of the end endoplasmic reticulum and the Golgi apparatus
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Answer:

The key difference between Golgi apparatus and endoplasmic reticulum is that the Golgi apparatus is not directly associated with the nucleus while some parts of the endoplasmic reticulum are continuous with the nuclear envelope. Golgi apparatus and endoplasmic reticulum are two very important organelles present inside the cells.

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3 years ago
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