Which worm phylum is being described ?

A nervous system consisting of a nerve net in the head and two nerve cords running the length of the body. Some members have light-sensitive eyespots

A. Platyhelminthes

B. Nematoda

C. Annelida

D. Arthropoda

Agene with the original sequence of atgtt—tact underwent substitution mutation to form atatt—tact after a few generations. tact is a part of a muscle protein encoding region, and atgtt codes for a digestive enzyme. what will be the effect of this mutation? a. the production of muscle protein will be affected. b. the production of digestive enzymes will be affected. c. the production of both the protein and the enzyme will be affected. d. the production of neither the protein nor the enzyme will be affected.

The large ground finch obtains food by cracking seeds. what is its short, strong beak an example? a) tendency toward perfection b) adaptation of a species over time c) selective use and disuse of an organ over time d) scarcity of recourses

You can tell from this karyotype that the individual is female because the karyotype has two chromosomes labeled