The origin of seeds occurred approximately ________ years ago.
A) 65 million
B) 360 million
C) 140 billion
D) 3.5 billion
B) 360 million
You might also like to view...
Leukopenia is the ________ in the level of white blood cells in a patient.
A. decrease B. abnormal production C. stabilization D. elevation
Which of the following brain structures would cause central diabetes insipidus if it were damaged?
A) cerebrum B) pons C) cerebellum D) hypothalamus
Cyanobacteria modulate the relative amounts of their different photopigments in response to the wavelength of incident light by a process known as ________.
A. adaptive photopigmentation B. wavelength adaptation C. chromatic adaptation D. light shifting
Which plant cells are the most common and the least specialized?
A. parenchyma B. collenchyma C. meristem D. epidermis E. sclerenchyma