... locomotion is lacking, reproduction depends on other features of the environment--wind, water, or animal pollination and seed dispersal. Animals are often important for dispersal of pollen and seeds. Reproductive structures vary widely: inflorescence type, flower sizes, shapes and colors; infructescence type, fruit sizes, shapes and colors; seed sizes and numbers. Most of these are clearly correlated ... of the savanna and desert zones (which see). ANIMAL ADAPTATIONS. With more spaces between trees, larger mammals are more prominent in this environment. There is more seasonality in repr...

• Word Count: 12375
• Approx Pages: 50
• Has Bibliography
• Grade Level: Undergraduate

... of each heart chamber. Cardiac muscle cannot make summated contractions or tetanus (which was interfere with the alternation between contraction and relaxation necessary for pumping). Smooth muscle surrounds hollow internal organs, such as the stomach, intestines, bladder, uterus, and blood vessels except capillaries. Smooth muscle cells are long and spindle-shaped, and each contains a single nucleus. They ... 2nd, which is made of striated muscle, can be controlled voluntarily by the brain (thus permitting a conscious decision to delay defecation). In all vertebrates except placental ma...

• Word Count: 9019
• Approx Pages: 36
• Has Bibliography
• Grade Level: Undergraduate

... still extant on earth, and since they are unable to utilize xylem and phloem like vascular plants to transport water, food, and minerals throughout the plant body, they must remain small and live in a very moist environment ( Shaw et al 2003). A very important distinction between bryophytes and other ... (Steel et al 2004). In fact, much scientific evidence suggests that bryophytes are among the very first examples of modern plant life. Bryophytes appear to be in a transitional stage of the evolutionary chain as we understand it. They share many common features of aquatic ... and feeding...

• Word Count: 1014
• Approx Pages: 4
• Has Bibliography
• Grade Level: Undergraduate

... . Therefore, American consumers should demand that a law be passed that requires genetically modified food to be labeled so that they can avoid eating genetically modified food. Genetically modified organisms are plant or meat products that been alter in a lab with genes from other plants, viruses, or bacteria in order to produce more food. Many of the foods we currently eat and ... other side effects. The American Academy of Environmental Medicine (AAEM) conducted research on animals and the results show that the animals that ate genetically modified corn had damage in their organs, dis...

• Word Count: 2198
• Approx Pages: 9
• Has Bibliography
• Grade Level: Undergraduate

... human cloning. The idea of cloning human embryos to recreate birth or create spare human tissues was developed by the biotechnology industry to help cure diseases and help fulfill the reproductive rights of infertile and/or gay couples. Although this seems to be a logical reason for scientific cloning, many believe that it will become more than this if eventually legalized. ... go deeper with experimentation and take cloning to the extreme. Aristotle may have agreed with the medical benefits to society which could occur from cloning, such as the transplant of organs to help individuals ...

• Word Count: 1540
• Approx Pages: 6
• Grade Level: Undergraduate

... Is True, attempts to provide succinct and tangible evidence of evolution. Present day research scientists are engaged in thorough analysis of plant and animal life in an effort to discover their origin and understand their response to certain factors in the society such as drought ... Coyne's book Why Evolution Is True provides unequivocal illustration of biological evidence of atavism. The tail of a human being, the functionless organs like the appendix and the improper design of the space between the Fallopian tube and the human ovary are exampled by the other ... things. It is a fac...

• Word Count: 2972
• Approx Pages: 12
• Has Bibliography
• Grade Level: Undergraduate