Answer:
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Explanation:
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Only once because the DNA replication initiation is tightly linked to cell cycle progression,ensuring that replication occur only once per cycle
The organism's cells are constrained by their varying shapes and sizes. Due to the need for surface area to exchange gases, the size distribution of the cell has been limited. Thus, option a is correct.
<h3>What is a cell?</h3>
The smallest unit of an organization that is essential for life is known as a cell. The different cells' varying sizes and shapes enable them to carry out various functions and activities.
The size distribution of the cell has been influenced by the cell's requirement for a cell surface area and volume in order for the exchange of gases to actually happen.
Therefore, option a. the cell size is influenced by surface area and gas exchange.
Learn more about cell size, here:
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<span>Echinodermata are more related to Chordata than to Mollusca because Echinodermata and Chordata are both A. Deuterostomes. Deuterostomes are</span><span> animals grouped together based on the way their embryos form in the earliest stages of development. </span>
Skin detects somatosensory sensations. Sensations on the skin are detected by cutaneous receptors which can detect:
• Pain
• Rough
• Cold
• Hot
• Soft
• Tickle.
Types of receptors on the skin include:
• Mechanoreceptors-light pressure, texture, vibration
• Thermoreceptors-temperature
• Nociceptors-strong pressure, pain.
