[单项选择]

Pigment cells with dark,reddish brown contents occurring either singly in the ground tissue or in a axial rows accompanying the vascular bundles关于色素细胞，描述不正确的是（）

A. 色素细胞含深红棕色物
B. 色素细胞含黑色物
C. 色素细胞围绕维管束
D. 色素细胞成轴行排列
E. 色素细胞在基本组织中单一存在

[填空题]Fat cells

[填空题]Karia Brown

[简答题]Dark adaptation

[单项选择]When the air in a certain space is squeezed to occupy a smaller space, the air is said to be （　）.
A. commenced
B. compressed
C. compromised
D. compensated

[判断题]Because prokaryotic cells have neither mitochondria nor chloroplasts, they cannot carry out either ATP synthesis or photosynthesis.

[单项选择]

Biologists have ascertained that specialized cells convert chemical energy into mechanical energy（）

A. determined
B. argued
C. pretended
D. hypothesized

[填空题]Mr. Tom Brown

[单项选择]Cells cannot remain alive outside certain limits of temperature, and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds are most efficient only within a narrow (31) around 37℃; a (32) , of a few degrees from this value seriously impairs their functioning. Even though cells can survive wider (33) , the integrated actions of bodily systems are impaired. Other animals have a wider tolerance (34) changes of bodily temperature.
For centuries (35) has been recognized that mammals and birds differ from other animals in the way they regulate body temperature. Ways of (36) the difference have become more accurate and meaningful over time, but popular terminology still reflects the old division (37) " warm blooded" and "cold blood- ed " species; warm blooded included mammals and birds, (38) all other creatures were considered cold blooded. (39) more species wer
A. into
B. of
C. by
D. with