Female birds in most families have only one functional ovary (the left one), connected to an oviduct — although two ovaries are present in the embryonic stage of each female bird.

Correct Option: D

Female birds in most families have only one functional ovary (the left one), connected to an oviduct — although two ovaries are present in the embryonic stage of each female bird.

Vitamin E is a powerful antioxidant that helps improve circulation. Apart from sexual desire itself, circulation is the most important component of sexual function. Good bodily circulation is mandatory for a good sex life. A deficiency in vitamin E can cause anemia, or a low red blood cell count, which affects your body's ability to produce sex hormones that promote reproductive system function.

Correct Option: C

Vitamin E is a powerful antioxidant that helps improve circulation. Apart from sexual desire itself, circulation is the most important component of sexual function. Good bodily circulation is mandatory for a good sex life. A deficiency in vitamin E can cause anemia, or a low red blood cell count, which affects your body's ability to produce sex hormones that promote reproductive system function.

Loss of all leaves lead to maximum harm as the tree loses its ability to perform photosynthesis so necessary for food manufacturing. Besides, loss of its bark will also be dangerous as it is the only part of a tree that is really alive. There is thin layer of cells right under the bark. If the bark is gone that layer dries out and dies.

Correct Option: B

Loss of all leaves lead to maximum harm as the tree loses its ability to perform photosynthesis so necessary for food manufacturing. Besides, loss of its bark will also be dangerous as it is the only part of a tree that is really alive. There is thin layer of cells right under the bark. If the bark is gone that layer dries out and dies.

Keratin is a fibrous protein making up most cells found in our nails and hair and the epidermis layer of our skin. It also makes up fish scales and crustacean shells, bird feathers and beaks, and animal horns and hooves.

Correct Option: D

Keratin is a fibrous protein making up most cells found in our nails and hair and the epidermis layer of our skin. It also makes up fish scales and crustacean shells, bird feathers and beaks, and animal horns and hooves.

Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. Normally, the liver metabolizes and excretes the bilirubin in the form of bile. However, if there is a disruption in this normal metabolism and/or production of bilirubin, jaundice may result.

Correct Option: B

Jaundice is a yellow discoloration of the skin, mucous membranes, and the whites of the eyes caused by increased amounts of bilirubin in the blood. Normally, the liver metabolizes and excretes the bilirubin in the form of bile. However, if there is a disruption in this normal metabolism and/or production of bilirubin, jaundice may result.