T-cells are a type of white blood cell that circulate around our bodies, scanning for cellular abnormalities and infections.
Answer: Option D
Adaptation is a trait that gives an organisms a reproductive advantage in the current environment.
Explanation:
Adaption or adaptive trait is a trait posses by an organism that play a functional role in its current environment as a result of natural selection. These traits help organisms to meet their basic needs and survive in their environment. Organisms body part undergoes changes like coloring, physical appearance and many more make organisms to have reproductive advantages.
Answer: E.
Explanation: the krebs cycle is a series of chemical reactions used by the body to produce energy, or ATP. it does this through the oxidation of pyruvic acid. for this reason, the krebs cycle is also called the citric acid cycle!
Answer: The correct answers are 1) Endocytosis and 2) Receptors are specific for the cells.
White blood cells are specialized cells of the immune system. They play important role in protecting body from foreign agents like bacteria . For this, they recognize the bacteria and forms a covering around it, pinching off the vacuole. By this, the cell performs a process called as Endocytosis ( specifically phogocytosis).
The receptors present on the white blood cells are quite specific. Due to this, they recognize specific foreign particles. For example B- cells produce antibodies which bind to specific antigens ( foreign protein) and therefore mount specific immune response. In other words, specific foreign particles are recognized by specific white blood cell. This indicates that the receptors on these cells are specific.
Thus, the correct answer is 1) Endocytosis and 2) Receptors are specific for the cells.
