Orbit,gravity,inner,solid,life,enormous
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Answer:
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Answer:
Part-A will lead toward the head development of Drosophila.
Explanation:
A morphogen is a substance that governs the pattern of tissue development in the process of morphogenesis or pattern formation, Pattern formation is one of the core processes in the development of Drosophila's body. Bicoid was the first protein demonstrated to act as a morphogen. Bicoid is a gene whose protein concentration gradient patterns the anterior-posterior (A-P) axis during Drosophila embryogenesis. Although Bicoid is important for the development of Drosophila's head. Bicoid concentration is high in the anterior side or in part-A of the Drosophila that will become the head. Bicoid concentration is low at the posterior side or part-E of the Drosophila that will become the tail.
Answer: Option D
Explanation:
The control of the non-crop vegetation is necessary in order to maintain the fertility of the soil.
The non crop vegetation should be cut in order to maintain the availability of the nutrients, water for the crop vegetation.
Example: The plant named eucalyptus has its roots deep inside the ground. So there is no other plant grown along with this plant because it will not get enough water for its growth.
Likewise the non crop vegetation should be stopped from growing to maintain the ecological balance.
Answer:
D. J. J. Thomson
An atom of calcium
Explanation:
J.J. Thomson while carrying out his experiment on the gas discharge tube discovered electrons. He called them cathode rays.
He observed from his experiment that these rays have the following properties;
- they move in a straight line normal to the cathode
- posses kinetic energy and cause the motion of a mechanical paddle
- attract positive charges
From his experiment, he proposed the plum pudding model of the atom where an atom is made up essentially of electrons.
B. The smallest particle of calcium that has all the chemical properties of calcium is an atom of calcium.
It is upon these unit of calcium that the substance calcium is formed. An atom of calcium will show the same properties as a block of calcium.