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3 years ago

Why is alchemy no longer accepted?

Biology

2 answers:

Elza [17]3 years ago

8 0

The answer is D. Scientists used evidence, analysis,and experiments to disprove alchemy

deff fn [24]3 years ago

8 0

Answer:

The correct answer is D. Scientists used evidence, analysis, and experiments to disprove alchemy.

Explanation:

Alchemy was based on changing a non-precious material into a precious material like lead into gold. It was considered as magic and science before the 19th century because in the 19th-century scientist get to know about the nature of metals and the periodic table that disproved alchemy.

Alchemist said that everything is made up of soil, water, fire, and earth but after the advancement of chemistry and physics it became clear that everything is made up of atoms, and lead is also made up of atom which can not be converted into gold.

So scientist used evidence, analysis, and experiments to disprove alchemy. Therefore the correct answer is D.

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What is a frameshift mutation? What is the cause of this type of mutation?

nika2105 [10]

A frameshift mutation (also called a framing error or a reading frame shift) is a genetic mutation causedby indels (insertions or deletions) of a number of nucleotides in a DNA sequence that is not divisible by three.

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2 years ago

Describe the characteristics of a non-vascular plant:

Sidana [21]

Unlike vascular plants, non-vascular plants do not have tissue specialised fro transport of fluids, so they cannot control the rate of water loss. However, they have simple tissues that can perform this function. They also lack in true leaves, seeds, flowers, and roots. They usually live in moist environment so they can absorb water more efficiently.

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3 years ago

a cell placed in a solution shrinks by the process of osmosis. what kind of solution is outside the cell?

nordsb [41]

The anser is what you doing

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3 years ago

Choose all the answers that apply.

arlik [135]

Answer:

Option A, B, and C are correct

Explanation:

Incomplete dominance means that the trait represented by two alleles expresses themselves equally thereby hindering dominance of any of the allele completely.

Now,

Let us assume the allele of red petals be represented by "R" and the allele of white petals be represented by "r"

The pink flowers will have genotype "Rr"

Now if two pink flowers are crossed, the following offsprings are produced

Rr X Rr

RR, Rr, Rr, rr

Let us evaluate all the options one by one

a) Ration of pink flower to red flower ( Rr:RR)

There are 2 pink (Rr) flower and 1 Red (RR) , thus the ration of pink flower to red flower is 2:1. Option A is correct

b) one out of four offspring is white in color, therefore the % of white flower is

$\frac{1}{4} * 100\\= 25\\$ %. Option B is correct

c) Two pairs RR and rr are homozygous, thus out of four offsprings two are homozygous. Therefore %of homozygous flowers will be

$\frac{2}{4} * 100\\= 50\\$ %. Option C is correct

d) There are two heterozygous offsprings i.e Rr, therefore the % of heterozygous is $\frac{2}{4} * 100\\= 50\\$ %. Option D is incorrect

e) half of the flowers are hybrid. Therefore option e is incorrect

Therefore, Option A, B, and C are correct

4 0

3 years ago

An individual heterozygous for eye color, skin color, and number of eyes mates with an individual who is homozygous recessive fo

sukhopar [10]

Answer:

B) 1 black eyes, green skin, two eyes : 1 black eyes, green skin, one eye : 1 black eyes, white skin, two eyes : 1 orange eyes, green skin, two eyes : 1 orange eyes, white skin, two eyes : 1 orange eyes, white skin, one eye

Explanation:

Parentals: BbGgCc x bbggcc

The punette square diagram of the cross of these two parents is attached.

B = black eyes, b = orange eyes;

G = green skin, g = white skin;

C = two eyes, c = one eye

Progeny with BbGgCc genotype → black eyes, green skin, two eyes = 8

Progeny with BbGgcc genotype → black eyes, green skin, one eye = 8

Progeny with BbggCc genotype → black eyes, white skin, two eyes = 8

Progeny with bbGgCc genotype → orange eyes, green skin, two eyes = 8

Progeny with Bbggcc genotype → black eyes, white skin, one eye = 8

Progeny with bbGgcc genotype → orange eyes, green skin, one eye = 8

Progeny with bbggCc genotype → orange eyes, white skin, two eyes = 8

Progeny with bbggcc genotype → orange eyes, white skin, one eye = 8

So, if we will see them in the form of ratio then each of the genotype will be in the ratio of 1 i.e. black eyes, green skin, two eyes: black eyes, green skin, one eye: black eyes, white skin, two eyes: orange eyes, green skin, two eyes: black eyes, white skin, one eye: orange eyes, green skin, one eye: orange eyes, white skin, two eyes : orange eyes, white skin, one eye = 1:1:1:1:1:1:1:1.

So, in view of above option B is most appropriate.

Note: In a trihybrid cross, a total of 64 progeny types may be produced.

6 0

3 years ago