What characteristics of sponges allow sexual reproduction by fragmentation?
What will be an ideal response?
Sponges, unlike many other animals, lack specialized tissues that would preclude asexual reproduction by fragmentation. So if a piece of a sponge breaks off, it may grow into a new sponge.
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Which of the following traits of complex multicellular organisms is also shared by some simple multicellular organisms, but not by single-celled organisms?
A. plasmodesmata B. adhesion C. cell signaling D. bulk transport E. None of the answer options is correct.
Which of the following produces histamine in response to an allergic reaction?
a. mast cell b. macrophage c. cytokine d. interferon
The fluid-mosaic model of membrane structure includes the following:
a) mobile components that can engage in transient or semi permanent interactions b) membrane proteins c) all of the choices are correct d) a lipid bilayer
If you are not satisfied with your physician, ________
A) your insurance company requires you to stay with him or her B) it is too late to find a new one because you signed a contract C) you are allowed to find another one who better suits your needs D) you should go to the ER with every symptom