Answer:
(E) present the two sides of the debate concerning the development of the vertebrate skeleton
Explanation:
In the paragraph, the author talks about two sides of view in the subject of vertebrates evolution. On one hand, he/she says that the first idea of vertebrates development is that the skeleton evolved as a defensive character and that many researchers rely on soft-bodied vertebrates to conclude it. On the other hand, he/she says that other researchers postulate that some vertebrate features (as paired eyes and adaptation in some muscles) could not have evolved if the first vertebrates were not depredators.
b. The relationship between the bacteria and the ticks is competition, and the relationship between the ticks and the humans is parasitism.
c. The relationship between the bacteria and the ticks is commensalism, and the relationship between the ticks and the humans is parasitism.
d. The relationship between the bacteria and the ticks is commensalism, and the relationship between the ticks and the humans is predation.
Commensalism is a relationship between two organisms in which only one of them has benefit, and the other one is not affected. Bacteria are carried by ticks, so bacteria have a benefit from the relationship. Tick is not affected by bacteria, it does not get Lyme disease. Therefore, the relationship between ticks and bacteria is commensalism.
The relationship between ticks and humans is parasitism. Parasitism is non-mutual relationship between two organisms in which one of them (tick) benefits at the expense of the host organism (human).
b. The kingdom classification system can change based on the discovery of new information and organisms.
c. The kingdom system is made of permanent groups that will not change.
d. The current kingdom system has two main divisions: Plantae and Animalia.
O B. Photosynthesis
O C. Fermentation
O D. Cellular respiration
Answer:
Photosynthesis
Explanation:
Chloroplast contains chlorophyll which absorbs sunlight and let photosynthesis happen.
Answer:
photosynthesis
Explanation:
Chloroplasts are found in plant cells its function is the process by which energy from the Sun is converted into chemical energy for growth. Also called photosynthesis.
In the Igf-2 allele, which chromosome is imprinted? Which is expressed?
Match the following terms with their descriptions below.
If a cell is fused with another cell, which of the following would be the best example of a trans-mechanism of epigenetic control?
Answer: A gene that is originally silenced in one cell but expressed in the other is silenced in the hybrid.
I hope this helps, Regards.
The trans-mechanism of epigenetic control can result from the fusion of cells, as seen when certain diets in mice alter DNA methylation. An example of gene imprinting, another form of epigenetic control, is seen in the Igf-2 allele where the paternal allele is expressed and the maternal allele is silent.
The fusion of cells can lead to a specific type of epigenetic control, termed trans-mechanism. This process is best exemplified in the case of the pseudoagouti offspring phenomenon in mice. When female mice are fed a specific diet, it alters the methylation processes of their DNA. As a result, a specific region in the agouti gene becomes hypermethylated which in turn leads to an increased proportion of pseudoagouti offspring.
Addressing the second part of your question, in the Igf-2, or the Insulin-like growth factor 2 gene, it is the paternal allele that is usually expressed while the maternal allele is imprinted and silenced. Imprinting is another form of epigenetic control where the activity of a gene is determined based on which parent the allele was inherited from.
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