Sucrose

Could you define what a hemiacetal is? Please reference your sources. (Wikipedia is not a reference I'm allowed to use unfortunately.)

Develop one or two hypotheses explaining why only eukaryotic cells are found in multicellular organisms

Often, prokaryotic cells exist as simple unicellular organisms, but in some species, prokaryotic cells can grow together in colonies or filaments. In addition, some species, such as Cynaobacteria or Myxobacteria, demonstrate intercellular communicate , or might even produce specialized cells and structures. However, only euka ...continues

Does evolution through natural selection produce...

Does evolution through natural selection produce "better" organisms in an absolute sense? Are we climbing the ladder of Nature? Defend your answer.

In many countries, conservationalists are trying to design national

In many countries, conservationalists are trying to design national park systems so that "islands" of natural area (the big parks) are connected by thin "corridors" of undisturbed habitat. The ideas is that this arrangement will allow animals and plants to migrate between refuges. Why would such migration be important?

Is this science?

Is this Science? Biologist E. O. Wilson has estimated that 27,000 species go extinct each year. Sinec skeptics, however, point out that scientists have documented the disappearance of only 1100 species over the past 500 years. Does this observation demonstrate that Wilson's estimate is inaccurate? Explain your answer.

Science Problems

I have been looking through several books trying to locate the answer to these questions. Please help. 1. Two possible end products of fermentation are ____________ as is produced by our muscle cell under anaerobic conditions and ____________ by yeast under anaerobic conditions. 2. If C4 photosynthesis prevents photor ...continues

4 Biology Problems

1. The integrity of the plasma membrane is essential for cellular survival. Could the immune system utilize this fact to destroy foreign cells that have invaded the body? How might cells of the immune system disrupt membranes of foreign cells? (Two hints: virtually all cells can secrete proteins, and some proteins form pores in ...continues

Help needed

AP Bio: Preparation of Human Chromosome Spreads- Kit 4 1. Specify the location and function of the centromere. 2. a) Name the three types of chromosomes found in human cells based on the location of the centromere. b) Which type is not found in human cells? 3. Why is it necessary to expose the cells to hypotonic solut ...continues

Specify the location and function of the centromere...

1. Specify the location and function of the centromere. The centromere is a region of a eukaryotic chromosome where the kinetochore is assembled thus; it is the site where spindle fibers of the mitotic spindle attach to the chromosome during mitosis. (Centromeres are highly complex chromosomal substructures involved in essenti ...continues

4 paragraphs

Argue for or against the statement, "Viruses are alive." The internal structure of many protists is much more complex than that of cells of multicelluar organisms. Does this mean that the protist is engaged in more complex activities than the multicellular organism? If not, why should the protistan cell be much more complicated? ...continues