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