Question

question 1
evidence that all living cells have a common origin is best illustrated by:

• the basic similarities in cell structure and chemistry
• the idea that cells are the smallest units that can carry out all life activities
• the fact that all new cells come from previously existing cells
• the fact that cells are the building blocks of the most complex plants

question 2
why is it advantageous for cells to be small?

• a small cell has a small surface area relative to volume, which allows efficient transport through the plasma membrane.
• a small cell size prevents a cell from weighing too much.
• a small cell has a small volume relative to surface area, which allows efficient transport through the plasma membrane.
• a small cell is better able to conserve energy than a larger cell.

question 3
specialized structures within a living cell are known as __________.

• prokaryotic structures
• eukaryotic structures
• organelles
• cell structures

Explanation:

• Question 1: The basic similarities in cell structure and chemistry across all living cells suggest a common origin. All cells have fundamental components like a cell - membrane, and similar biochemical processes occur in them.
• Question 2: A small cell has a large surface - area to volume ratio. This allows for efficient transport of substances across the plasma membrane as the distance for diffusion is relatively short.
• Question 3: Organelles are specialized structures within a living cell that perform specific functions. For example, mitochondria are the power - houses of the cell, and chloroplasts are involved in photosynthesis in plant cells.

Answer:

• Question 1: the basic similarities in cell structure and chemistry
• Question 2: A small cell has a small volume relative to surface area, which allows efficient transport through the plasma membrane.
• Question 3: Organelles