All of the following are membranous organelles except . ANSWER
Unselected
mitochondria and lysosomes

Unselected
microvilli and centrioles

Unselected
Golgi apparatus and peroxisomes

Unselected
nucleus and endoplasmic reticulum

Unselected
I DON'T KNOW YET

Which is an advantage of having memory cells when a pathogen is encountered for a second time. a) the memory cells are what proliferate into clones of cells in response to the binding of an antigen. b) memory cells are vital to the primary immune response in that they immediately recognize pathogens even at the first encounter. c) memory cells are essentially effector cells that are short lived and attack antigens even without having a receptor specific to that antigen. d) it ensures that more lymphocytes with a receptor specific to a particular antigen will be present than in a host that had never encountered that pathogen.

Ture or false evidence for evolution includes millions of fossils

Plant species a has a diploid number of 12. plant species b has a diploid number of 16. a new species, c, arises as an allopolyploid from a and b. the diploid number for species c would probably be a) 12. b) 14. c) 16. d) 28. e) 56.