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Paul [167]
3 years ago
10

Scientists have found that all living things, from bacteria to humans, rely on genetic codes to direct the functions of their ce

lls. These genetic codes are contained in strings of nucleotides and have very similar structures. Which hypothesis for the origin of life on Earth is supported by this evidence?
Biology
2 answers:
telo118 [61]3 years ago
8 0

Answer:

A. Self-replicating RNA in the early Earth's oceans served as the basis for the DNA in cells today.

leonid [27]3 years ago
3 0
<span>Self-replicating RNA in the early Earth's oceans served as the basis for the DNA in cells today</span>
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If a true-breeding blue-flowered plant was crossed with a true-breeding white-flowered plant, what phenotypic ratio would we obs
Westkost [7]

Answer:

B. 100 percent white

Explanation:

According to Mendel's law of dominance, the dominant allele of a gene masks the expression of the recessive allele in a heterozygous state. Therefore, when two pure breeding plants that differ with respect to one genetic trait are crossed, the progeny expresses only the dominant phenotype. Here, one allele should be completely dominant over the other. The allele for the white flowers is completely dominant over the allele for the blue flowers.

Let' assume that the allele "W" imparts white color to the flowers while the allele "w" gives blue color. When a true-breeding blue-flowered plant (ww) is crossed with a true-breeding white-flowered plant (WW), the progeny would be heterozygous for the dominant allele "W" and would exhibit "white color of flowers" (the dominant trait).

WW (white-flowered plant) x ww (blue-flowered plant) = Ww (white-flowered plant)

6 0
3 years ago
The third level of cell organization is the _____.
Dima020 [189]
The levels of cell organization go

1. cells
2. tissues
3. organs
4. organ systems
5. organisms

so the answer is D, organ level
8 0
4 years ago
Read 2 more answers
Deafness is a _____ along with ADHD. comorbidity dual-disease syndrome discrepancy disease psychopathological syndrome
viva [34]

Answer:

<em>The correct option is A) comorbidity</em>

Explanation:

In the field of medicine, comorbidity can be described as a term which is used for disorders which show more than one disorders along with a primary disorder.

For example, ADHD is a attention deficit hyperactivity disorder in which a person experiences a number of conditions such as problems in attention, the ability to sit still, and self-control. the same case goes with deafness. Although the primary effect of deafness is the lack of the ability to hear but certain other factors such as posture and balance are affected by it.

7 0
3 years ago
Differentiate between global warming and the green house effect. What gases are responsible for both?
Alona [7]

Answer:

Global Warming is simply the long-term rise in temperature of the Earth's core, which inevitably would effect the climate systems of the Earth.

The Green House Effect is the natural process that warms the Earths surface.

Explanation:

The Green House Effect--> When the Sun's energy reaches the Earth's atmosphere, some of it is reflected back into space and the rest is absorbed and re-radiated by the greenhouse gases.

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