Are there any more endangered animals who are experiencing a bottleneck effect. I read an article and I had this question in mind.

Specialized cells which perform a particular function form : organisms organs tissues

The first amino acid of a new polypeptide chain is

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.