Which gland helps fight against cold A. Pituitary gland

B. Thyroid

C. Adrenal gland

D. Pancreas

The concept of keystone species is controversial among ecologists because most organisms are highly interdependent. if each of the trophic levels is dependant on all others how can we say one is most important

Which is not a type of symmetry? a. asymmetryb. radial symmetryc. bilateral symmetryd. lateral symmetry

What advantages does a pedigree have over a written passage?