Answer:
Explanation:
A
b. False
Answer:
True
Explanation:
Phnacetin can be produced using Williamson-ether synthesis. In this, phenacetin is derived from acetaminophen and the reaction involve interaction of alkoxide or phenoxide with a methyl or primary alkyl halide
In amide synthesis mechanism, acetic anhydride and phenetidine (p-ethoxyaniline) react to phenacetin through a nucleophilic acyl substitution
Hence, the given statement is true
Answer:
c
Explanation:
Answer:
The population of predators most often eliminates the population of prey.
Explanation:
It produces genetically identical cells.
0 It provides a means of asexual reproduction.
O It allows for cell and tissue repair
B. Schwann
C. Hooke
D. Leeuwenhoek
Answer:
C
Explanation:
The statement that correctly describes the presence of freckles is there are two alleles for freckles, hence option B is correct.
An allele is a variation of the same sequence of nucleotides at the same place on a long DNA molecule, as described in leading textbooks on genetics and evolution.
Small, brownish to reddish dots on your skin are known as freckles. They frequently appear on your face, neck, back, upper chest, hands, and arms, as well as other sun-exposed places. Even though freckles are typically not harmful, it is always a good idea to keep an eye out for any changes.
Therefore, the statement that correctly describes the presence of freckles is there are two alleles for freckles, hence option B is correct.
Learn more about alleles, here:
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Answer:
b
Explanation:
edge2020
Answer:
chloroplasts
Explanation:
Among the listed organelles, chloroplasts cannot be found in an animal cell. Instead, chloroplasts are present in plant cells and certain algae, playing a key role in the process of photosynthesis. The other organelles - ribosomes, lysosomes, and vacuoles - are all present in animal cells.
Among the options listed - chloroplast, ribosome, lysosome, and vacuole - the one that cannot be found in an animal cell is the chloroplast. Chloroplasts are organelles present in plant cells and certain algae. They play a critical role in a process called photosynthesis, during which sunlight, water, and carbon dioxide are converted into oxygen and glucose. However, animal cells do not have chloroplasts because they do not perform photosynthesis. Instead, they obtain energy via different processes such as cellular respiration, which happens in mitochondria. On the other hand, ribosomes, lysosomes, and vacuoles are indeed present in animal cells. Ribosomes are involved in the synthesis of proteins, lysosomes handle waste disposal and cellular digestion, and vacuoles are involved in storing substances and maintaining turgor pressure within the cell.
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