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Fed [463]
3 years ago
5

Define Law of Conservation of Energy.

Biology
1 answer:
Ainat [17]3 years ago
8 0

Answer: Energy cannot be created or destroyed

Explanation:

Law of Conservation of Energy states that energy can neither be created nor destroyed, rather it is conserved.

For instance:

- an electric pressing iron convert electrical energy to heat energy;

- a solar panel convert solar energy to electrical energy etc

In all of these examples, energy is conserved by being converted from one form to another in nature.

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Explain how mitotic recombination leads to the mosaic condition termed twin spots.
postnew [5]

Answer:

If an individual Drosophila has two or more populations of cells comprising different genotypes from one single egg then it is termed as twin spots or mosaic.

Explanation:

There might be different reasons for mosaic to occur like

Nondisjunctioning of the chromosomes

Lag in anaphase

Endoreplication

Mutations in a single cell

Mitotic recombination:

One of the major ways through which mosaic or twin spots arise is the mitotic recombination. It is also termed as somatic cross over. Twin spot or mosaic generally occurs if there is linking of heterozygous genes in repulsion. The recombination generally happens among the centromeres from the adjacent genes.

A common example of the mitotic recombination is the Bloom's syndrome. Bloom's syndrome is caused due to the mutation that occurs in the <em>blm</em> gene. As a result, there are defects in the BLM protein produced.

7 0
2 years ago
What is the functional advantage of the alveolar walls being so thin?
Sati [7]
Alveolar walls are thin to enable the quick passage of oxygen in and out of the lungs. The lungs works hand-in-hand with the heart and also is responsible in converting blood that's de-oxygenated into an oxygenated blood that is usable by the organ systems of the body. The alveolar walls are also designed to have thin membranes so that it can expand and constrict quickly allowing us to breather properly.
4 0
3 years ago
In which step of protein synthesis does the rRNA make protein?
Inessa [10]

Answer:

Translation is the second part of the central dogma of molecular biology: RNA → Protein. It is the process in which the genetic code in mRNA is read to make a protein. Translation is illustrated in the diagram below. After mRNA leaves the nucleus, it moves to a ribosome, which consists of rRNA and proteins.

Explanation:

Within the ribosome, the rRNA molecules direct the catalytic steps of protein synthesis — the stitching together of amino acids to make a protein molecule. In fact, rRNA is sometimes called a ribozyme or catalytic RNA to reflect this function.

8 0
2 years ago
If a blood vessel has valves, it probably is a
Len [333]
If it has valves then it is a vein.
3 0
3 years ago
All rock on the ocean floor is less than 180 million years old because _____.
mixas84 [53]
All rock on the ocean floor is less than 180 million years old because <span>reverse polarity removed older rock strips magnetized in a different direction. Also,</span> the oldest parts reach the continental crust and then the ocean floor sinks beneath the continental crust, into the mantle.
5 0
2 years ago
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