Which of the following can be a type of microfossil? select all that apply. a. pollen b. spores c. ostracods d. ammonites e. stromatolites f. foraminifera

A. pollen, B. spores, C. ostracods, F. foraminifera

Microfossils are the fossils which develop from the remains of tiny organisms or parts of these organisms. These parts or traces are so small that they can be only observed with the help of microscope. They are found typically less than 1 mm in size. Plant microfossils includes pollen and spores. Small animals also develop into microfossils. The remains of large animals can be found in microfossils. Ostracods are sea zooplanktons belong to the class of Crustacea. These are called as sea shrimps. These are found typically around 1 mm in size. Foraminifera is the class of amoeboid protists. These are minute zooplankton found in sea.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.

what is the statement?