Correct Answer: D) Volvox

Explanation

This question is asking which of the given organisms does not exist as a single free-living cell. The options are Amoeba, Euglena, Clamydomonas, and Volvox. The correct answer is Option D: Volvox. Volvox is a type of green algae that forms colonies of cells. Each colony can contain thousands of cells, which are connected to each other and function as a single organism. Therefore, it does not exist as a single free-living cell. In contrast, Amoeba is a single-celled organism that can move and engulf food particles. Euglena is also a single-celled organism that can move using a flagellum and has both plant-like and animal-like characteristics. Clamydomonas is a type of green algae that exists as a single free-living cell. Understanding the differences between single-celled and multi-cellular organisms is important in the study of biology. Single-celled organisms are capable of performing all necessary life functions on their own, whereas multi-cellular organisms have specialized cells and structures that allow them to perform specific functions. To learn more about this, please read the relevant sections of the recommended textbooks.

Correct Answer: C. Sucrose - pepsin

Explanation

All the enzymes are rightly matched to the class of food they act upon except the Sucrose - Pepsin match. Pepsin acts upon proteins and not sucrose essentially.

Correct Answer: A. organic matter

Correct Answer: D) cerebrum

Explanation

The question is asking which part of the central nervous system is responsible for answering an examination question. The central nervous system is made up of the brain and spinal cord, which work together to control the body's functions. The brain is divided into different parts, each with its own function. The spinal cord is responsible for transmitting messages between the brain and the rest of the body. The options given are spinal cord, cerebellum, oryx, cerebrum, and medulla oblongata. Spinal cord and medulla oblongata are not involved in thinking or decision-making processes. The oryx is a type of antelope and is not part of the central nervous system. The cerebellum, located at the back of the brain, is responsible for coordinating movement and balance. It is not directly involved in answering examination questions. The correct answer is the cerebrum, which is the largest part of the brain and is divided into two hemispheres. The cerebrum is responsible for thinking, decision-making, and problem-solving, which are all necessary for answering an examination question. In summary, the part of the central nervous system responsible for answering an examination question is the cerebrum. It is the largest part of the brain and is responsible for thinking, decision-making, and problem-solving.

Correct Answer: A. more rapid elongation of the hypocotyl than the epicotyl

Correct Answer: A. reduction of carbon(IV)oxide to organic

Correct Answer: D) Algae

Explanation

This type of growth can be found in phytoplankton algae because they posses essential nutrients like (nitrogen, phosphorous and magnesium)

Correct Answer: D. cell membrane

Correct Answer: A. pelvic girdle, fore and hind limbs

Correct Answer: C) 12 pairs

Explanation

The question is asking about the number of cranial nerves that connect the brain to different parts of the body. Cranial nerves are a group of nerves that emerge directly from the brain, rather than from the spinal cord. These nerves control various functions, including vision, hearing, smell, taste, and movement of the face and tongue. The options provided are 10 pairs, 11 pairs, 12 pairs, and 13 pairs. To answer the question, we need to know the correct number of cranial nerves. The correct answer is option C, which is 12 pairs. Each pair of cranial nerves has a specific function, such as the olfactory nerve for smell, the optic nerve for vision, and the vagus nerve for controlling the heart and digestive system. The 12 pairs of cranial nerves are named in order from the front of the brain to the back: olfactory, optic, oculomotor, trochlear, trigeminal, abducens, facial, vestibulocochlear, glossopharyngeal, vagus, accessory, and hypoglossal nerves. It is important to note that the functions of the cranial nerves can be affected by various diseases or injuries, which can lead to symptoms such as loss of vision or hearing, difficulty swallowing or speaking, or paralysis of the face or tongue. However, with proper diagnosis and treatment, many of these conditions can be managed or treated. In summary, the correct answer to the question is option C, which is 12 pairs of cranial nerves that connect the brain to various parts of the body. Each pair of nerves has a specific function, and they can be affected by different diseases or injuries.