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An unidentified species of animal displays the following characteristics: bilateral symmetry, a complete digestive system, an open circulatory system, distinct body segmentation,  it has six jointed walking legs, and it molts when it grows. To which of the following animal phyla does this species most likely belong?

Viruses are non-living particles consisting of a protein shell containing DNA or RNA.

The fungal ________ is a network of branched hyphae adapted for absorption.

Explain why antibiotics that affect the cell wall of bacteria are generally not harmful to humans but kill bacteria.

An unidentified species of animal displays the following characteristics: bilateral symmetry, a complete digestive system, an open circulatory system, distinct body segmentation,  it has six jointed walking legs, and it molts when it grows. To which of the following animal phyla does this species most likely belong?

The tube that leads into the lungs is called the ____.

The fungal ________ is a network of branched hyphae adapted for absorption.

  Natural selection _____ the frequencies of alleles that enhance survival and reproduction.

Seeds can lie dormant for many years.

One function of the integumentary system is to make vitamin _____.