Fossil stromatolites are evidence that cells exited 3.5 million years ago

_____________ Indicate whether the statement is true or false.


F, billion

Biology & Microbiology

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Competent cells are those used in studies of conjugation

Indicate whether the statement is true or false

Biology & Microbiology

Which type of granulocyte gives rise to antibodies?

A) neutrophil B) T lymphocyte C) B lymphocyte D) monocyte E) eosinophil

Biology & Microbiology

Which of these situations regarding phloem sources and sinks is not correct?  

A.  The root of a carrot plant is a source. B.  Young leaves are sinks. C.  A growing pumpkin is a sink. D.  In a seedling, the cotyledons would be sources. E.  During autumn, deciduous tree roots would be a sink.

Biology & Microbiology

Carbon dioxide and ________ are the major gases in the atmosphere that absorb energy from the sun

Fill in the blank(s) with correct word

Biology & Microbiology