How does the proportion of hydrogen and helium in the universe support the Big Bang theory? A. It is the proportion predicted to be present in the early universe.
B. It demonstrates the rate of expansion predicted by the theory
C. lt proves that matter must be formed under high temperatures
D. It shows that only simple elements are present in the universe​

An ecologist studied the same species of deer during the summer and the winter. she noticed that during the summer, when there was plenty of food, the deer were energetic and playful. however, during winter when food was scarce, the deer moved more slowly and did not run unless they needed to escape a predator. which scientific fact is best supported by her observations?

What type of plant is good for a bioassay and where can i buy it? i only have a month.

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.