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:
<u>C. the types of cells and the tissues in which they can be found in a plant.</u>
Answer:
Chemical bonds contain potential energy.
Explanation:
Chemical bonds always contain potential energy. The atoms of the bond want to move to a lower energy to become more stable.. The energy for breaking bonds only comes when stronger bonds are formed. This energy is used to tear apart the bonds holding the Hydrogen atoms together. The strength of the covalent bonds depend on the overlap between the valence orbitals of the bonded Atom.
To substances that are bonded together but can be taken apart
Answer:
Glomeromycota
Explanation:
The phylum Glomeromycota represents a group of fungi where all representatives of this division reproduce asexually forming Glomerospores as reproductive structures. These fungi are characterized by being a species that introduces genetic diversity in the population during reproduction, creating a diploid zygote that results from the union of the nuclei of two mutually compatible cells.
