The first air-breathing land animals were:a
vertebrates.
b. amphibians.
c. snails.
d. reptiles.
e. arthropods.
E
Biology & Microbiology
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The carcinogenic compound ____, which damages kidneys and the nervous system, is produced by some strains of Aspergillus flavus.
Fill in the blank(s) with the appropriate word(s).
Biology & Microbiology
During breathing the epiglottis points ________ and air moves through the larynx into the ________
a. upwards, trachea b. upward, bronchiole c. upward, lungs d. downward, trachea e. downward, bronchiole
Biology & Microbiology
What are two types of defenses that plants have evolved in response to herbivory?
What will be an ideal response?
Biology & Microbiology
The calyx is composed of ____
a. petals b. sepals c. stigmas d. ovules e. anthers
Biology & Microbiology