Why don't protists (eg. sponges) need circulatory systems?   Question 12 options:   None of their cells are in contact with their externl environment so that waste can not diffuse out of their bodies.   All of their cells are in contact with their external environment so that nutrients and oygen can diffuse into cells.   This is a misleading question because all animals have circulatory systems.   They are such simple animals that they don't need oxygen.

Question 4. You have identified a mouse that develops a leaky gut with leakage of conents of the intestine into the connective tissue. Which of the four junction that we discussed do you think may be dysfunctional in this mouse? Short Answer

what is the answer? a,b,c

What 2 types of cell junctions would allow cardiac muscles of the heart to contract in a coordinated manner and withstand the pumping and filling action of the heart?     gap junctions and desmosomes     tight junctions and desmosomes     tight junctions and gap junctions

The maroon clownfish can't meet all of its survival needs without the Bubble tip anemone.what survival need does the anemone provide

QUESTION 3: What do the words acoelomate, pseudocoelomate, and coelomate mean?  What is the evolutionary trend between these three categories?

The eyes of fruit flies look red because they contain molecules called pigments, which color the eyes red. Cells in the eyes of fruit flies have parts that make these pigments from other molecules. Time elapsed 00 34 04 HR MIN SEC The molecules that will become pigments are brought inside these cell parts by a protein called a transporter. This transporter protein is encoded by the w gene. Challenge Stage 2 of 2 Get 6 correct in a row a white fly eye (left) and a red fly eye Scientists in a lab found a fruit fly that had white eyes. This fly had a mutation in its w gene. Compared to the w gene without a mutation, the mutated w gene encoded a form of the transporter protein with a different structure. This different form of the transporter protein could not bring molecules into the parts of the fly's eye cells where pigments are made. So, the fly's eyes had no pigments. Fill in the blanks. the transporter protein the w gene a fruit fly trait The mutation in affected the structure and…

What cells have a cell membrane?   Question 1 options:   all cells except plant cells   all cells   eukaryotic cells only   animal cells only   only cells in multicellular organism

One advantage of being multicellular is that the organism can increase insize. Unicellular organisms cannot achieve this large size. What limitsunicellular growth? How do multicellular animals solve this problem?

which of the following allows multicellular organisms to be more complex than colonial organisms? - differentiation - de-differentiation - aggregation