All DNA sequences are transcribed into RNA
A. true
B. false
B
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Cyanobacteria modulate the relative amounts of their different photopigments in response to the wavelength of incident light by a process known as ________.
A. light shifting B. chromatic adaptation C. adaptive photopigmentation D. wavelength adaptation
The synaptonemal complex forms in which subphase of prophase I of meiosis?
A) leptotene B) zygotene C) pachytene D) diplotene E) diakinesis
Euglena use a contractile vacuole for osmotic regulation.
Answer the following statement true (T) or false (F)
In 2004, Jun-Yuan Chen and David Bottjer found a fossil approximately 580-600 million years old. Why was this particular fossil significant?
A. It was one of the earliest fossils of a single-celled organism. B. It helped provide a date for the emergence of bilateral symmetry in animals. C. It provided evidence that the earliest life forms were heterotrophic. D. It provided evidence that the earliest life forms were autotrophic. E. It helped provide a date for the emergence of vertebrates.