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3 years ago

replacement is the molecule by molecule substitution of another mineral of different composition for the original material

Biology

2 answers:

Daniel [21]3 years ago

8 0

Answer:

False

Replacement is not the molecule by molecule substitution of another mineral of different composition for the original material

Explanation:

Substitution pseudomorph a mineral that is able to replace another one after appearing in a substitution process. The volume, amount, and dimensions are the same but the element is different. This can't happen with regular elements only with substitution pseudomorphs. Substitution as a process doesn't exist. However, a phenomenon called substitution reaction exists, this process is when a functional group is replaced by another one. But not simply substitution. Therefore, the correct asnwer is false.

Viefleur [7K]3 years ago

5 0

Replacement is the molecule-by-molecule substitution of another mineral of different composition for the original material. The fine details of shell structures and wood are generally preserved. Minerals which commonly replace hard parts are silica and pyrite

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Energy pyhamids, otherwise known as trophic level diagrams, are used to represent the flow of

raketka [301]

From the total energy that reaches the ground, 1% is used by producers. The energy transference in the trophic web follows the 10% rule, in which each level uses 10% of the energy stored by the anterior level.

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Only 1% of the total solar energy that reaches the ground is used by producers, who occupy the first trophic level.

From this input of solar energy, it begins a unidirectional energy flow through all the organisms in the ecosystem, from autotrophs to heterotrophs, until it is finally dissipated in the environment.

At each trophic level, it occurs an energy transfer from one level to the next, with only 10% being usable in each of them. This assessment is called "The 10% rule".

This is, as a general rule, only about 10% of the energy stored as biomass at one trophic level, per unit time, ends up as biomass at the next trophic level, in the same unit of time.

The progressive reduction of energy determines the number of trophic levels (4 or 5).

If 30,000,000 MJ of Sunlight (solar energy) reaches ground, then only 30,000 MJ can be absorbed by primary producers.

5,216.4 MJ from 52,164 MJ of energy stored in the soybeans, are used by cattle.

1,645 MJ of energy is stored in edible beef by cattle who eat the soybeans.

164.5 MJ of this energy is tranferred to the following trophic level.

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3 years ago

Which of the following factors does not vary between a fast flowing river and a pond that receives no water input?. . oxygen lev

Fiesta28 [93]

Salt concentration is the factor among the following factors given in the question that does not vary between a fast flowing river and a pond that receives no water input. The correct option among all the options that are given in the question is the second option. I hope the answer comes to your help.

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4 years ago

What Evidence supports natural selection

SashulF [63]

Fossil record, genetics, and examples of local adaptations all support the theory of evolution by natural selection.

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3 years ago

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The point on earths surface directly above an earthquakes focus is called

vlada-n [284]

The point on earth's surface directly above an earthquakes focus (hypocenter) is called the epicenter.

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3 years ago

Imagine that two unlinked autosomal genes with simple dominance code in goats for size, where T is tall and t is short, and for

Fittoniya [83]

Answer:

(A) 0.0625

(B) 25%

Explanation:

Given that ;

T is tall

t is short

R is red

r is tan.

If a short, tan male goat mates with a tall, red female goat of an unknown genotype;

Let's take it one after the other;

A short tan male goat = ttrr

The female goat is an unknown genotype, we will have to determine that but we were told that it is tall and red

∴ For tall it is T and red is R;

Definitely, the female genotype should be T_ R_;

the probability genotype of the female for each allele is either:

- TT or Tt

- RR or Rr

However, from above;

the probability that the female will be Tt = $\frac{1}{2}$

the probability that the female will be Rr = $\frac{1}{2}$

the probability that the recessive allele 't' will be transferred to the offspring = $\frac{1}{2}$

the probability that the recessive allele 'r' will be transferred to the offspring = $\frac{1}{2}$

∴ the probability that they would produce short, tan offspring (ttrr) will be;

= $(\frac{1}{2})^{4}$

= $(\frac{1}{16})$

= 0.0625

(B)

One of a pea plants is homozygous recessive for both genes, resulting in the cross Yy Rr × yy rr. Calculate the percentage of green and round offspring.

For Color, Let;

Y = Yellow

y = Green

For shape, Let;

R = Round

r = wrinkled

If a cross occur between Yy Rr × yy rr. (i.e yellowround and green wrinkled)

the percentage of green and round offspring will be;

If Yy Rr self crossed; we have the following traits (YR, Yr, yR, yr)

yy rr will result to (yr, yr)

YR Yr yR yr

yr YyRr Yyrr yyRr Yyrr

Yellow Yellow Green Green

Round Wrinkled Round Wrinkled

Therefore, the percentage of Green and Round offsprings from above is:

= $\frac{2}{8}*100%$ %

= $\frac{1}{4}*100$ %

= 25%

7 0

4 years ago