Answer:
Option (3)
Explanation:
The continental crust is usually thick because it has an average thickness of about 35-40 km. In the high mountain ranges, it is the thickest, forming about 80 km on an average. These are formed when two continental plates form a sandwich pattern by sharing a convergent type of plate boundary.
For example, the thickest part of the crust is the Mt. Everest which lies in the great Himalayan range, which has started to form about 50 million years back. It is geologically the most recent mountain range.
The older mountains are continuously eroded in the geological past, as a result of which the height of the mountains is affected.
Thus, the correct answer is option (3).
There are many grains of starch in the cortex because it represents the reserve food material of plants.
This source of food material is consumed during plant metabolism, as food when plants are under stress, or as an energy source in seed germination and early seedling stages.
The cortex, in plants, is a vascular tissue responsible for the transport of food (processed sap) from the leaves to the rest of the plant .
Starch grains are the most common solid particles that plant cells develop within plastids.
Assimilation starch is a temporary product of photosynthesis and is formed in chloroplasts, while reserve starch is formed in amyloplasts, which are contained in parenchymal cells of the cortex, in vascular tissues of stems and roots, in the pith of stems, in fruits, leaves, fleshy cotyledons and in modified stems, such as tubers and rhizomes.
Starch is the main energy and carbon reserve in plants, supplying the energy and carbon skeletons necessary for the plant's metabolism during periods of darkness, when photosynthesis is inactive.
Therefore, we can conclude that starch grains (ergasstic substances) are found in abundance in the cortex because it represents a reserve of essential molecules for the functioning and maintenance of the cellular structure.
Learn more here: brainly.com/question/18303563
Answer:
B. Smaller and more mobile gametes
Explanation:
Answer:
A distribution is said to be symmetrical when the values of Mean, Median, and Mode are equal.
In a positively skewed distribution, the Mean and median would be to the left to the Mean.
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