This reproductive structure can be considered an advancement over spores. it protects the embryo from injury and drying out. it also provides food for the embryo. this plant structure is a a) leaf. b) seed. c) cone. d) flower.

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above

Imagine a self-reactive t cell that has not undergone clonal deletion in the thymus (that is to say, it has escaped central tolerance). if it encounters self antigen in the absence of an infection or inflammation, what will happen to this self-reactive t cell? (select two answers) (a) the t cell undergoes clonal expansion. (b) the t cell gains effector functions. (c) the t cell undergoes apoptosis. (d) the t cell becomes activated. (e) the t cell becomes anergic.

30 points! explain the 3 differences in the chart below: flowers cones spores 1. 1. 1. 2. 2. 2. 3. 3. 3. i am not sure what the differences between them are, if someone could explain that would be