cells in the vegetal half of the embryo should be unpigmented those in the animal half and there should be heavily pigmented.
Explanation:
The Yolk molecules moving in the vegetal halves of the egg which is the case in most of the animals, slows down the cell division. These lesser division area or the zone demarcates the area to be vegetal pole and due to lesser cell division, it becomes unpigmented or less pigmented Based on the observation time and perspect with assuming no movement.
The pole opposite to the vegetal, is animal pole which with absence or less of yolk, gets more ability to divide and hence become more pigmented or heavily pigmented. This brings polarity to the egg and becomes telolecithal egg.
In simple words, osteoporosis can be stated as the medical state in which the bones become breakable and weak from loss of tissue. Due to the deficiency of calcium or vitamin D.
<u>Explanation:</u>
<u>Environmental factors that influence osteoporosis:</u>
- Due to smoking, and consuming alcohol leads to the Osteoporosis.
- Intake of Poor diet food and intake of low calcium can leads to Osteoporosis .
- Chronic diseases like arthritis and liver infection can cause Osteoporosis .
- Due to the Malabsorption, it will lead to Osteoporosis .
- Vitamin D helps the body to absorb calcium.
- When vitamin D is wanting, the body cannot absorb sufficient amounts of calcium to inhibit osteoporosis. Some medications can cause osteoporosis.
Dionusr. Anicent Marine mammals Based on the fossil,
Answer:
Smaller the size of the DNA fragment, farther it moves during electrophoresis. The sketch of the position of the fragments has been drawn in the figure below.
Explanation:
As we know DNA is a negatively charged molecule. So during electrophoresis the fragments move towards the positive electrode because opposite charges attract each other.
Different fragment move different distances according to their size during the electrophoresis. Smallest segment travels the largest distance in the gel medium while the largest one travels least distance.
In the question there are four DNA fragments with base pairs 4000, 2500, 2000 and 400 so the smallest segment with 400bp will be farthest from the starting point and the largest fragment with 4000bp will travel least distance in the gel medium. Their respective positions are shown in the figure below. The starting point is near the negative electrode.
