The first land plants were bryophytes, which then branched into ferns, gymnosperms, and finally angiosperms. What advantage did gymnosperms have over ferns?
a. Gymnosperms produce pollen and do not require water to reproduce
b. Gymnosperms go through alternation of generations
c. Gymnosperms have a vascular system, which allowed them to grow taller
d. The gymnosperms can grow larger gametophytes
e. Gymnosperms can produce flowers and fruits to aid in seed dispersal
Answer: a. Gymnosperms produce pollen and do not require water to reproduce
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A. planarian B. monogenean C. tapeworm D. trematode E. ctenophore
A monophyletic group_________
A. consists of an ancestor and some of its descendants. B. is characterized by one or more homoplasies. C. consists of an ancestor and all of its descendants.
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a. by active transport of ions out of the body by chloride cells b. by maintaining high levels of urea and trimethylamine oxide in body fluids c. by active transport of ions into the body through the gills d. by excreting nitrogenous wastes through their kidneys as urea
In the late 1800s, Streptococcus pneumoniae was widely recognized as a major cause of pneumonia and is still the most common cause of the disease today. Based on its name, what shape is this organism?
What will be an ideal response?