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Ghella [55]
2 years ago
9

Who rediscovered Aristarchus's model of a heliocentric solar system?

Biology
1 answer:
lara31 [8.8K]2 years ago
7 0

Answer is:

Copernicus

Explanation:

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Horticulturists are attempting to breed a rare and beautiful variety of pine tree, where all the branches droop gracefully to th
Dahasolnce [82]

Answer:

it's 25%

Explanation:

the recessive is two r and one R is makeing the gene dominant. Heterozygous is Rr and two make 75% dominant and 25% recessive

3 0
3 years ago
Consider the following three populations of birds. Assume HW equilibrium. With these birds red coloring is recessive, while brow
bixtya [17]

Answer:

Red allele frequency will be highest in population II

Population III can undergo bottleneck effect

The frequency of the brown allele will  least likely be altered in the population I

Explanation:

Population I -

Total population - 670

Brown birds - 603

Red birds - 67

Population II

Total population - 100

Brown birds - 90

Red birds - 10

Population III

Total population - 30

Brown birds - 27

Red birds - 3

Frequency of red birds in population I

\frac{67}{670} = 0.1

Frequency of red birds in population II

\frac{10}{90} = 0.11

Frequency of red birds in population III

\frac{3}{30} = 0.1

Red allele frequency will be highest in population II and it will be equal to \sqrt{0.11} = 0.33 as compared to 0.31 in case of population I and III

Population III can undergo bottleneck effect because of smaller population size

The frequency of the brown allele will  least likely be altered in the population that has highest  brown individual , i.e population I

4 0
4 years ago
Question 2 (Multiple Choice Worth 4 points)
lisabon 2012 [21]

Answer:

B

Mutation is the ultimate source of genetic variation, but mechanisms such as sexual reproduction and genetic drift contribute to it as well Because prokaryotes are haploid, such a mutation immediately become part of the genetic makeup of the cell unlike eukaryotic diploids where a normal second copy of the gene usually protects the cell from the potentially lethal effect of such a mutation.

7 0
3 years ago
What happens as humans use more land for development<br>​
Lina20 [59]

Answer:

Humans impact the physical environment in many ways: overpopulation, pollution, burning fossil fuels, and deforestation. Changes like these have triggered climate change, soil erosion, poor air quality, and undrinkable water.

4 0
3 years ago
Read 2 more answers
The double helix of dna is which level of structure?
Vlad1618 [11]
<span>The double helix of dna is which level of structure? a.Primary

</span>
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