Answer:
The human disease phenylketonuria has symptoms that include mental problems, chronic skin rashes, and reduced hair and skin pigmentation. Phenylketonuria can be caused by a mutation in a single gene.
Phenlyketonuria is an example of pleiotropy. Based on this, it can be concluded that pleiotropy occurs when a single gene influences multiple traits.
Explanation:
Answer:
The correct otion is d.
Reason:
Primordial soup model was presented to explain the surface of earth in its prehistoric era.
Answer:
Type of radioactive decay which has occurred is an alpha decay.
Explanation:
Type of radioactive decays:
- Alpha decay is defined as the decay process in which alpha particle is released. In this process, a heavier nuclei decays into a lighter nuclei. The alpha particle released carries a charge of +2 units and a mass of 4 units.
- Beta decay is defined as the process in which beta particle is emitted. In this process, a neutron gets converted to a proton and an electron.
The released beta particle is also known as electron.
- Gamma decay In this process, an unstable nuclei releases excess energy by a spontaneous electromagnetic process and gamma -radiations are emitted. These radiations does not carry any charge and are electrically neutral.
Answer:
The answer is letter A.
Explanation:
During anaerobic respiration, lactate levels increase when muscles cells need more energy, however muscles cells eventually fatigue, thus athletes should modify their activities to increase aerobic respiration.
Fungi lacks the ability to produce their own food because they do not have chloroplast which is needed to obtain energy from the sun and convert it into food. Also fungi lack ability to fix nitrogen which has to be incorporated into their food. They also can not fix carbon and utilize it to produce food. Because of these they have to depend on dead organic matters for food.
