The correct answer is: A. A change in a cell's genetic material.
Mutations occur in DNA as a result of mistakes during the DNA replication (when repair mechanisms don’t fix it) or as the result of environmental factors (e.g. UV light). Mutations can have positive impact, by increasing the genetic variation or can have negative effect, causing the diseases or cancer.
Explanation:
seeds are the prime stage of a plant to it's development journey .
It's main function is the development and nourishment of embryo.
there is food already received in seed.
in the stage of development it provides with amount of water and help in development...
saasahhha xa hajur lai yo answer kam lagne xa❤️
Answer:
When the sun, moon and earth are at right angles, this is called a neap tide.
When the sun, moon, and earth are parrallel to each other, this is called a spring tide.
Explanation:
There are two types of tides spring tide and neap tide.
A spring tide occurs when the sun and moon are parallel to each other. This usually happens during periods of full and new moon, which are the moments that the moon can form a straight line with the sun, causing the gravitational force to interfere with the tide.
The neap tide, on the other hand, happens when the sun, moon and earth are at right angles. This moment occurs between the waxing and waning moons, where the sun and moon are at right angles and the earth is used as a vertex of that angle. In this type of tide the gravity of the sun becomes more influential than that of the moon.
All choices correctly describes physical barriers. Physical barriers after composed of tight junctions wherein it is difficult for the bacteria and viruses to penetrate. Examples of these physical barriers are the skin and the mucous membranes and these work in conjunction with secretions like tears and mucus (as tears and mucus contain IgA, a special type of immunoglobulin that is secreted to fight harmful organisms).
It might change over time to compensate fir its environment
