How do petrified fossilization differ from carbonized fossils? Petrified fossils do not need carbon to be fossilized.
Petrified fossils are only made in desert type environment.
Petrified fossils need a lot of carbon in order to be come a fossil.
Petrified fossils dissolve all original parts including carbon.
PLEASE HELP I WILL GIVE BRAINLIEST

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.

What are the pros and cons of quadrat sampling?

All annelids and arthropods have a blank body plan . unlike annelids, arthropods also have blank . the circulatory system of annelids is blank , while circulatory system of arthropods is blank .