Biology Quiz 7

Animal protein is called first-class protein because it is rich in essential amino acids. It is superior to plant protein because animal proteins contain a broad spectrum of amino acids with more vitamins and minerals than plant proteins.

The tusks of an elephant are upper incisors that are modified to become long and curved. They replace deciduous milk teeth at 6–12 months of age and grow continuously at about 17 cm (7 in) a year.

The reaction of a person to a bee sting may vary according to the bee species. While bee stinger venom is slightly acidic.

Goats tend to be less susceptible to heat stress than animals like cows, donkeys, and buffalos. They can tolerate more summer heat. A healthy adult goat can survive in temperatures ranging from below -18°Celcius and above 38°Celcius.

By mass, about 96 percent of the human body is made up of just four elements: oxygen (65 percent), carbon (18.5 percent), hydrogen (9.5 percent), and nitrogen (3.3 percent). Oxygen (O) together with hydrogen form water, which is the primary solvent found in the body and is used to regulate temperature and osmotic pressure.

The human skeleton of an adult consists of around 206 bones. There are typically around 270 bones in human infants, which fuse to become 206 to 213 bones in the human adult.

Dengue viruses (DENV) are the causative organism of dengue fever. They are transmitted to humans through the bite of an infected Aedes species mosquito.

Diphtheria is a highly contagious, infectious disease caused by the bacteria Corynebacterium diphtheriae. It is a serious bacterial infection that usually affects the mucous membranes of the nose and throat.

Due to Vitamin D deficiency, the limb bones of children become bent. Vitamin D deficiency can cause children to get rickets. Rickets is a disease that causes thin, weak and deformed bones. In adults, not having enough vitamin D and calcium causes osteoporosis (loss of bone density) and can lead to fractures.

Testosterone is the primary sex hormone in males. It plays a key role in the development of male reproductive tissues such as testes and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.