The simplest form of protist based on its simple cell structure and ability to change shape in response to external disturbance would be amoeba.
<h3>Amoeba</h3>
Amoeba is a unicellular organism that belongs to the division of living organisms known as protists.
Amoeba can be found in freshwater environments such as ponds, moist soils, lakes, etc. The cell contains important organelles such as the nucleus, contractile vacuole, etc.
A typical amoeba cell has no definitive shape but changes according to different environmental stimuli.
More on amoeba can be found here: brainly.com/question/2005112
The function of the nucleus is to protect the cell’s DNA and control cellular activities. Two of the structures that the nucleus depends on are ribosomes and the nuclear membrane. The ribosomes assist with protein synthesis. Rough ER contains ribosomes on its surface and transports proteins throughout the cell. Smooth ER makes lipids and distributes them within the cell.
Answer:
Option-D
Explanation:
Casparian strips are the strips or band composed of a hydrophobic substance called the suberin which forms the ring-like structure in the endodermis of the vascular plants.
The Casparian strips are present around the vascular bundles in the endodermis to allow the uptake of the selective nutrients as the substance has to pass through the cell membrane before it enters the centre of the root or stele or vascular bundles.
The Casparian strips allow the movement of a substance through symplast mode only, therefore, is ensures the substance to pass through the cell membrane.
Thus, Option-D is correct.
