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Rashid [163]
3 years ago
13

Explain why the heart is described as an organ and not as a tissue.

Biology
1 answer:
Rudik [331]3 years ago
5 0
The heart is an organ (rather than a tissue) because it has an important (and complex) function. Tissues don't have nearly as many things in it as the heart does. 

Hope this helps! :)
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The scientists modified the genes that were turned on/off (expressed) in mice. What happened to the offspring of these mice?
daser333 [38]

The resulting mice will be induced with the changed gene either on or off. The offspring will have altered genes if both the alleles have the trait. This is a heritable change.

Explanation:

Making gene on or off is a process of gene regulation when one of the gene is methylated or histone modification to prevent access to transcription factors hence no expression of the protein. This process is called epigenetics.

The resulting progeny in mice will receive the allele of on or off the gene. Such genes with altered allele are also called as

The altered genes will be expressed in the resulting progeny of mice.

The epigenetic genes can be reverted with environmental effects in the offspring paramutable alleles. They are heritable.

6 0
4 years ago
"in a chemical synapse, neurotransmitters are spilled into the synaptic cleft by what action?"
34kurt
Starting from the triggering action potential, the membrane potential in the neuron will propagate from the dendrites to the cell body then to the axons where synaptic vesicles are located. The action potential will trigger an influx of calcium into the axon then calcium will bind to proteins that will move the synaptic vesicles to the synaptic cleft. The membrane of the synaptic vesicles will eventually join the membrane of the synapse and then the neurotransmitters inside the vesicles will be "spilled" into the synaptic cleft.
3 0
3 years ago
Nitrogen helps increase corn yield, so..
FromTheMoon [43]

Explanation:

The goal of timing nitrogen (N) applications to corn is to supply adequate N when the crop needs it, without supplying excess that can potentially be lost. Because N reactions in the soil are closely linked to both temperature and moisture conditions, this goal is often hard to achieve.

5 0
3 years ago
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During mitosis:
notsponge [240]
True because the chromosomes needs to be split on both sides
3 0
3 years ago
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Alex is studying a population of fifty organisms that belong to the same species. Some of the organisms have dark spots, some ha
Gennadij [26K]

Answer:

Sexual reproduction

Explanation:

There is a significant amount of genetic variation (diversity) here. Asexual reproduction results in little to no diversity, so we can assume this species reproduces sexually. Hope it helps :)

6 0
3 years ago
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