In the internal leaf structure shown above, the item labeled "3" is
a. a vascular bundle.
b. spongy mesophyll.
c. epidermis.
d. a stoma.
e. palisade mesophyll.
B
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Some green algae exhibit alternation of generations. All land plants exhibit alternation of generations. No charophytes (stoneworts) exhibit alternation of generations
Keeping in mind the recent evidence from molecular systematics, the correct interpretation of these observations is that _____. A) charophytes are not related to either green algae or land plants B) plants evolved alternation of generations independently of charophytes C) alternation of generations cannot be beneficial to charophytes D) land plants evolved directly from the green algae that perform alternation of generations E) scientists have no evidence to indicate whether or not land plants evolved from any kind of alga
The use of ____________________ is banned or restricted in more than 23 countries due to its toxicity
Fill in the blank(s) with correct word
Differentiate between endotoxins and exoenzymes
What will be an ideal response?
Capsids are composed of protein subunits known as
a) capsomeres. b) spikes. c) envelopes. d) tail fibers.