Rough Endoplasmic Reticulum (ER)
What will be an ideal response?
Proteins are synthesized by ribosomes bound to it. It packages proteins into clathrin coated transport vesicles.
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Algae appear in colors of gold, brown, red, or green. The significance of that fact is:
A. These pigments absorb the quality of light prevalent in their various preferred habitats and enhance their photosynthetic ability. B. These pigments camouflage them from grazers. C. These pigments warn grazers of their toxic properties. D. These pigments are waste products stored in the tissues. E. All of the other choices provided are incorrect.
What is the function of surfactant in the mammalian respiratory system?
A. reduction of surface tension in the fluid covering the alveoli B. capture and removal of inhaled foreign particles C. maintaining a moist surface D. transport of oxygen E. It functions as an antibiotic.
Sponge cells capture nutrients in the form of _____ by the process of _____
A. macromolecules; diffusion and active transport B. food particles; diffusion and active transport C. macromolecules; endocytosis D. food particles; endocytosis E. micromolecules; diffusion and active transport
Answer the following statements true (T) or false (F)
1. Stem cells have determinate cleavage. 2. Very great differences in body form can result from only small differences of gene expression. 3. Radiata have neither an anterior end nor a posterior end. 4. All eumetazoans have cell junctions. 5. Gastrulation is brought about by an invagination of the wall of the blastocoel.