Influenza, commonly known as the 'flu', is an infectious disease of birds and mammals caused by RNA viruses. The most common symptoms are chills, fever, sore throat, muscle pains, headache (often severe), coughing, weakness/fatigue and general discomfort. Typically, influenza is transmitted through the air by coughs or sneezes, creating aerosols containing the virus.

Correct Option: A

Influenza, commonly known as the 'flu', is an infectious disease of birds and mammals caused by RNA viruses. The most common symptoms are chills, fever, sore throat, muscle pains, headache (often severe), coughing, weakness/fatigue and general discomfort. Typically, influenza is transmitted through the air by coughs or sneezes, creating aerosols containing the virus.

Carbohydrates are initially synthesized in plants from a complex series of reactions involving photosynthesis. The simplified version of this chemical reaction is to utilize carbon dioxide molecules from the air and water molecules and the energy from the sun to produce a simple sugar such as glucose and oxygen molecules as a byproduct.

Correct Option: B

Carbohydrates are initially synthesized in plants from a complex series of reactions involving photosynthesis. The simplified version of this chemical reaction is to utilize carbon dioxide molecules from the air and water molecules and the energy from the sun to produce a simple sugar such as glucose and oxygen molecules as a byproduct.

Embryonic stem cells are distinguished by two distinctive properties: (a) their pluripotency, and (b) their ability to replicate indefinitely. They are capable of propagating themselves indefinitely. This allows embryonic stem cells to be employed as useful tools for both research and regenerative medicine, because they can produce limitless numbers of themselves for continued research or clinical use.

Correct Option: C

Embryonic stem cells are distinguished by two distinctive properties: (a) their pluripotency, and (b) their ability to replicate indefinitely. They are capable of propagating themselves indefinitely. This allows embryonic stem cells to be employed as useful tools for both research and regenerative medicine, because they can produce limitless numbers of themselves for continued research or clinical use.

Chloroplasts are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis and other chemical reactions. All chloroplasts contain the green pigment chlorophyll a, but not all chloroplasts are green because accessory pigments may be present that can change or override the green colour.

Correct Option: C

Chloroplasts are organelles found in plant cells and other eukaryotic organisms that conduct photosynthesis and other chemical reactions. All chloroplasts contain the green pigment chlorophyll a, but not all chloroplasts are green because accessory pigments may be present that can change or override the green colour.

Entamoeba histolytica is an anaerobic parasitic protozoan, part of the genus Entamoeba. When cysts are swallowed they cause infections by excysting (releasing the trophozoite stage) in the digestive tract. The infection can lead to amoebic dysentery or amoebic liver abscess.

Correct Option: B

Entamoeba histolytica is an anaerobic parasitic protozoan, part of the genus Entamoeba. When cysts are swallowed they cause infections by excysting (releasing the trophozoite stage) in the digestive tract. The infection can lead to amoebic dysentery or amoebic liver abscess.