D) it has to depend on the type of crypt
Answer:
4 min to 6 min
Explanation:
Most people have a four-to-six minute supply of oxygen in the body at any one time.
However, a group of people called the Bajau have divers who can stay underwater for as long as 13 min at depths of around 60 m.
Answer:
antigen-MHC protein complexes
Explanation:
Helper T-cells recognise antigens that are complexed with MHC proteins and interact with target cells. Antibodies can be produced against a single antigen in a variety of ways. Toxic shock syndrome is a relatively mild condition that resembles other minor allergy responses. Antigen-presenting cells break down superantigens.
(Hope this helps can i pls have brainlist (crown)☺️)
Magnitude and direction
Explanation:
A vector quantity has both magnitude and direction. This is different from a scalar quantity that has only magnitude but no direction.
- Examples of vectors are velocity, acceleration, displacement, momentum e.t.c
- These quantities are physical quantities in which their magnitude has specific directions through which they are channeled.
Learn more:
Vector change brainly.com/question/1910409
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