A distinguishing feature of mammals is the possession of
Skin
Scale
Nail
Hair
Correct answer is D
The following features is exactly what makes a mammal a mammal, and not a reptile, a bird, or a fish: Hair, Middle Ear Bones, Sweat Glands, and Temperature regulation.
The gland close to the trachea is the
Pancreas
Liver
Adrenal
Thyroid
Correct answer is D
The thyroid gland, along with the esophagus, pharynx, and trachea, is found within the visceral compartment of the neck
Double fertilization is a unique feature of
Angiosperms
Bryophytes
Pteridophytes
Algae
Correct answer is A
Double fertilization is a complex fertilization mechanism of flowering plants (angiosperms). This process involves the joining of a female gametophyte (mega gametophyte, also called the embryo sac) with two male gametes (sperm).
Swollen, bleeding gums are another common sign of what vitamin deficiency?
Vitamin K
Vitamin B
Vitamin C
Vitamin D
Correct answer is C
Vitamin C deficiency can occur as part of general under nutrition, but severe deficiency results in scurvy. Symptoms include fatigue, depression, and connective tissue defects (eg, gingivitis, petechiae, rash, internal bleeding, impaired wound healing).
Accessory material in a chicken egg include the following except
Albumen
Shell membrane
Shell
Germinal disc
Correct answer is D
The germinal disk (blastoderm)-- a small, circular, white spot (2-3 mm across) on the surface of the yolk-- is where the sperm enters the egg. The nucleus of the egg is in the blastodisc. The embryo develops from this disk, and gradually sends blood vessels into the yolk to use it for nutrition as the embryo develops.
A small mass of active protoplasm found directly under the vitelline membrane.