B. White blood cell
C. Stem cell
D. Liver cell
Answer:
C. Stem Cell
Explanation:
Because a specialized tissue cell is a stem cell and cells that are already specialized cannot go back to being a stem cell.
Answer:
The correct answer is b. melanin
Explanation:
The various pigments and nutrients which are found in a cell but are not organelle because they do not perform activities like organelle perform are called cell inclusions. Some of the examples of cell inclusions are lipids, melanin, lipids, etc.
Therefore melanin is considered as inclusion. Melanin is produced by specialized cells called melanocytes from where it gets transported to skin and hair which provided the skin and hair its color. Therefore the right answer is melanin.
Melanin is an inclusion, not an organelle.
An organelle is a specialized structure within a cell that performs specific functions. Based on the options given, melanin is an inclusion, not an organelle.
Melanin is a pigment found in the skin, hair, and eyes, responsible for color. It is not a specialized structure within a cell like lysosome, cilia, and microtubule, which are all organelles.
In conclusion, the correct answer is melanin.
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The answer is D:
In transformation, a special sex pilus is required to connect two bacterial cells.
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D. a source of energy
Monosaccharides are used by plants and animals as a source of energy.
B) All invertebrates are chordates; vertebrates are a group that is separate from both invertebrates and chordates.
C) All invertebrates are chordates; vertebrates are a group that is separate from both invertebrates and chordates.
D) Chordates are the largest group, and it is subdivided into two groups: vertebrates and invertebrates.
Answer:
The most appropriate answer would be option A.
The chordates refer to the organisms which belong to the phylum Chordata. They possess anatomical features like notochord, pharyngeal slits, dorsal nerve cord, post-anel tail, and endostyle during some period of their life cycle. They include classes amphibians, fish, reptiles, birds, and mammals. These organisms are believed to share a common ancestor.
In contrast, invertebrates refer to the organisms which lack a vertebral column. They include all the organisms other than vertebrates. For example, they include arthropods, mollusks, annelids, and cnidarians.