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3 years ago

what is the main difference between organisms that share many characteristics and organisms that do not ?

2 answers:

8 0

The main difference is that organisms that have similar characteristics could be in the same species or have common ancestors

goblinko [34]3 years ago

8 0

Organisms that share many characteristics have a common ancestor, while organisms that do not share many characteristics do not have a recent common ancestor.

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What is the entire object shown in the image?

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3 years ago

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In a population of 10,000 individuals of Monstera deliciosa, four individuals have a variegated phenotype that is caused by the

Mariulka [41]

Under the assumption of this population being in Hardy-Weinberg equilibrium, the probability for the fixation of the var recessive allele equals 0.02 = 2%

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Available data:

N = 10,000 individuals ⇒ Large population

4 individuals have a variegated phenotype

variegated phenotype is caused by the recessive var allele

No selection, no additional mutation ⇒ we can assume Hardy-Weinberg equilibrium

We need to know the probability for the fixation of the var allele.

We assume that the population is in Hardy-Weinberg equilibrium, so there should be no evolution.

Since the population is in H-W equilibrium, the allelic, genotypic and phenotypic frequencies will remain the same generation after generation.

Now, we will calculate the allelic and genotypic frequencies of variegated individuals in the population.

There are 10,000 individuals, and only 4 have variegated.

So, the phenotypic frequency, F(Var) is 4/10,000 = 0.0004 = 0.4%

Since this is a recessive phenotype, this value equals the genotypic frequency, F(vv) = 0.4%

Finally, we can get the allelic frequency by taking the square root of this value.

F(vv) = q² = 0.0004

f(v) = q = √0.0004 = 0.02 = 2%

According to these calcs, the probability for the fixation of the var allele is 2%, and the probability that all individuals express the variegated phenotype is 0.4%.

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You can learn more about Hardy-Weinberg equilibrium at

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3 years ago

What observation led researchers to propose that chloroplasts evolved from cyanobacteria?

shtirl [24]

Answer:

Both perform photosynthesis.

Explanation:

Both perform photosynthesis led researchers to propose that Chloroplast evolved from Cyanobacteria.

Chloroplast is a organelle that contain the green pigment called chlorophyii which perform photosynthesis. This is found in both plant cell and algae cell. This trap light energy from sunlight and uses carbondioxide with water to produce sugar.

Cyanobacteria are known to be the ancestor of chloroplast and they are also refer to as blue green algae because they contain chlorophyii which is a photosynthetic pigment. The Cyanobacteria are able to perform photosynthesis because of chlorophyii which trap light energy from sunlight and uses carbondioxide and water to produce energy.

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3 years ago

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What is the pigment found in red algae

-BARSIC- [3]

Hello!

Red algae are so named because of the pigment that so classifies them, the name of this pigment is Phycoerythrin.

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3 years ago

Which proteins is used as a chemical defense at body surfaces?

UNO [17]

Answer: Antimicrobial proteins.

Explanation:

Antimicrobial proteins are the type of proteins produced by the keratinocytes on the body surfaces. These proteins acts as the barrier and kills the microorganism which is trying to enter the body.

These are larger proteins containing more than 100 amino acids. They are often lytic in nature.

The cell membrane of the microbes is disrupted by the action of these amino acids or proteins on them.

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4 years ago