Why are seed plants an evolutionary advantage? seeds allows for the transport of water and nutrients. seeds develop into adults without sexual reproduction. seeds protect and nourish young, growing plants. seeds provide the materials for photosynthesis.

Answer;

C. Seeds protect and nourishing young, growing plants

Explanation;

Storage tissue to sustain growth and a protective coat give seeds superior evolutionary advantage over other type of plants. The seeds also contain an embryo which can be dormant until the conditions are favorable for growth.Additionally, seeds have an embryo that is diploid, which means it has two sets of chromosomes. The diploid seed germinates into sporophyte, this is different from fern and bryophyte which contain cells that are haploid that depend on water for faster gametophytes developments.

Option (A).

Explanation:

MHC class I and class II MHC molecules are important for the protein processing and presentation of the molecule. MHC class I molecules has the ability to expresse on all the nucleated cells whereas class II MHC molecules are mainly expressed on the B cells and macrophages ( antigen presenting cells).

The processing of MHC class II molecule involves the following steps. The breakdown of proteins into fragments by the help of enzyme. These fragments are transported to the rough endoplasmic reticulum. From RER, they fuse with the glogi vesicle that contains class II MHC molecule. The complex is then transported to the plasma membrane.

Thus, the correct answer is option (A).