A limnic eruption, also referred to as a lake overturn, is a rare type of natural disaster in which dissolved carbon dioxide (CO₂) suddenly erupts from deep lake water, suffocating wildlife, livestock and humans. Such an eruption may also cause tsunamis in the lake as the rising CO₂ displaces water.

Correct Option: D

A limnic eruption, also referred to as a lake overturn, is a rare type of natural disaster in which dissolved carbon dioxide (CO₂) suddenly erupts from deep lake water, suffocating wildlife, livestock and humans. Such an eruption may also cause tsunamis in the lake as the rising CO₂ displaces water.

Blood is considered a connective tissue for two basic reasons:
(i) embryologically, it has the same origin (mesodermal) as do the other connective tissue types and
(ii) blood connects the body systems together bringing the needed oxygen, nutrients, hormones and other signaling molecules, and removing the wastes.

Correct Option: A

Blood is considered a connective tissue for two basic reasons:
(i) embryologically, it has the same origin (mesodermal) as do the other connective tissue types and
(ii) blood connects the body systems together bringing the needed oxygen, nutrients, hormones and other signaling molecules, and removing the wastes.

Eight attempts have been made to date to eradicate infectious diseases. Two successful programs targeted smallpox and rinderpest. The last naturally occurring case of smallpox (Variola minor) was diagnosed on 26 October, 1977.

Correct Option: D

Eight attempts have been made to date to eradicate infectious diseases. Two successful programs targeted smallpox and rinderpest. The last naturally occurring case of smallpox (Variola minor) was diagnosed on 26 October, 1977.

Normal human body temperature in adults is 34.4–37.8 °C. Sometimes a narrower range is stated, such as 36.5–37.5 °C. Hypothermia is defined as any body temperature below 35.0 °C.

Correct Option: B

Normal human body temperature in adults is 34.4–37.8 °C. Sometimes a narrower range is stated, such as 36.5–37.5 °C. Hypothermia is defined as any body temperature below 35.0 °C.

DPT refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough) and tetanus. The vaccine components include diphtheria and tetanus toxoid, and killed whole cells of the organism that causes pertussis.

Correct Option: A

DPT refers to a class of combination vaccines against three infectious diseases in humans: diphtheria, pertussis (whooping cough) and tetanus. The vaccine components include diphtheria and tetanus toxoid, and killed whole cells of the organism that causes pertussis.