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<span>The major difference between viruses and living cells is that viruses do not have nuclei while living cells do. A second major difference is that viruses need a host cell to survive while living cells do not. For the most part, viruses just contain genetic material (typically in the form of RNA) inside of a capsid. Living cells have many more organelles, including ribosomes and cytoplasm, which viruses lack.</span>
Answer:
a. Excretion is accomplished by paired protonephridia with flame cells in every segment of the body. True
Most anelids have structures called metanephrids or protonephridia. Both structures are homologous to the kidneys and have the function of excresion, A pair are present in every segment of the body.
b. If the organs in one segment fail, the organs of another segment will still function. False
It is false because all segments are interrelated and have different functions depending on their location.For example, the first segment is where the sensory appendages are, such as the antennae and the eyes. The second segment is where the mouth is. There are a series of parapod segments to move, collectively called metameres and ends in a terminal portion called pigidium, where the anus is located.
c. Annelids possess both circular and longitudinal muscles that produce waves of contraction that are propagated down through the points eBookseries of segments.True
True because anelids have circular and longitudinal muscles that serve to function the hydrostatic skeleton.
d. Segmentation has allowed for specialization in the anterior of the annelid body, which has provided for a more sophisticated nervous system. True
True because the segmentation allows to have a nervous system formed by a ventral nerve cord provided with ganglia and lateral nerves in each segment.
During photosynthesis, plants absorb carbon dioxide and sunlight to create fuel-glucose and other sugars for building plant structures. This process forms the foundation of the fast (biological) carbon cycle.
The Slow Carbon Cycle. ... Atmospheric carbon combines with water to form a weak acid—carbonic acid—that falls to the surface in rain. The acid dissolves rocks-a process called chemical weathering-and releases calcium, magnesium, potassium, or sodium ions.
According to the research, the correct option is cell membrane. It enables eukaryotic cells to keep biochemicals and related structures in close proximity.
<h3>What is cell membrane?</h3>
It is defined as a laminar structure formed mainly by lipids and proteins that prevents the entire biochemical content of the cell from dispersing and defines its limits.
It enables the exchange of water, gases and nutrients between the cell and the environment that surrounds it and has proteins that perform functions of connection, transport, reception and catalysis.
Therefore, we can conclude that according to the research, the correct option is cell membrane. It enables eukaryotic cells to keep biochemicals and related structures in close proximity.
Learn more about eukaryotic cells here: brainly.com/question/3171977
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