Answer: the right answer is B
The best answer is C.
Plant cells are surrounded by a cell wall and have chloroplasts whereas animal cell do not.
The cell wall is a covering that is rigid whose main purpose is to protect the cell and give structural support as well shape to the plant cell. The equivalent of a cell wall in animal cell is the cell membrane, which has distinct differences from the plant cell wall.
Chloroplasts are plant cell organelles which carry out photosynthesis by which plants make their own food. These are absent from animal cells because animals do not make their own food, they ingest it from external sources.
2 chains and 4 nucleotides
The period of the D string on the violin would be 0.0034 seconds.
<h3>What is the period of a wave?</h3>
The period of a generated wave is the time it takes for the wave's wavelength or successive crests or troughs to pass through a specific point. In other words, it is the time required to complete a full cycle of oscillation.
Mathematically, the period of a wave is given by:
Period = 1/f
where f is the frequency of the wave.
In the case of the D string of the violin in the illustrated problem, the frequency of the wave is given as 293 Hz when it is in tune. Thus, the period can be calculated as:
Period = 1/293
= 0.0034 seconds
Thus, the period of oscillation of wave generated by the D string on the violin with a frequency of 293 Hz is 0.0034 seconds.
More on the period of waves can be found here: brainly.com/question/14588679
#SPJ1
diffusion. would be the best answer to use