Answer:
peptide antigens by MHC class II molecules
Explanation:
Helper T cells are activated by peptide antigens by MHC class II molecules. These antigens express on the surface of antigen-presenting cells (APCs). After activation, the T helper cells divide and secrete cytokines to assist the immune response.
Answer:
The force of friction is reduced between the blocks by adding the dishwashing liquid because the liquid is slippery and this makes it difficult for the two surfaces to contact each other directly. Therefore the blocks slip past each other rather than grinding against each other, producing less friction.
Explanation:
Hope This Helps :P
The correct answer is: subjunctive and conditional.
Subjunctive mood – mood used for the expression of various states of unreality. This include the states such as wish, emotion, possibility, opinion..
Conditional – used for the expression of states: what could happen, what might have happened, and what we wish would happen..
Answer:
Different flavors of a gene are called alleles
After a tornado or a hurricane the local ecosystem will be very damaged, and when the wind stops blowing, or all the water is drained/dried, the ecosystem will start recovering:
- The earth will recover
- Plants will regrow.
- Animals will come back.
- The ecosystem will slowly rebuild.
Hope it helped,
BiologiaMagister
