Describe 3 anatomical features that distinguish a bivalve from the phylum Mollusca from a brachiopod
What will be an ideal response?
Even though both bivalves and brachiopods have two shells that enclose the animals, there are a number of differences between the two in the shape of the shell and anatomy of the animals. First, the shells of brachiopods are unequal and are dorsal and ventral compared to the bivalve shells, which are left and right and are equal in size. Second, brachiopods attach to the substrate by means of an elongated pedicle that does not exist in bivalves. Finally, the brachiopods feed by means of a ring of tentacles called a lophophore, which they use for capturing detritus. Bivalves rely on their siphons for bringing water and food into their cavities.
You might also like to view...
The ________ of water is caused by the unequal sharing of electrons between oxygen and hydrogen atoms
Fill in the blank with correct word.
________ organisms such as green and purple bacteria derive electrons from sulfide, thiosulfate, and succinate to generate NADPH
Fill in the blank with correct word.
Imagine that a mutant mouse has a defect in the distribution of norepinephrine receptors, so that all the arteries and arterioles carry the type of norepinephrine receptor normally found around the brain and heart. What would you predict for this mouse in response to hemorrhage?
A. Blood vessels near the brain and heart will constrict, while blood vessels elsewhere will be dilated. B. Vasoconstriction near the brain and heart will prevent enough blood from reaching those organs. C. Blood vessels near the brain and heart will be dilated, while blood vessels elsewhere will constrict. D. Vessels throughout the body will stay dilated, resulting in inadequate blood flow to the brain and heart.
When one gene causes multiple effects, the condition is called ________
A) incomplete dominance B) pleiotropy C) codominance D) multiple alleles