Midterm Practical

BIO 1101, Spring 2003

Midterm Practical

Short Answer Questions

Name ______

1. If the diameter of a human egg is 1X10-4 m, how big is it in m? Show how you got to your answer.

1. If a volume is 175 l, what is it in ml?

1. You measure the pH of your garden soil and find that it is 6. You measure the pH of peat moss and find that it is 4. How much greater is the concentration of hydrogen ions in peat moss than in the garden soil?

1. A student focuses on a specimen at low power and then changes it to high power. At high power, however, he doesn’t see the part of the specimen he was interested in. What might be the problem?

1. Inspired by her biology lab, a student decides to make a closer study of the food she eats. She uses a razor blade to make a very thin section from a raw potato and mounts it in a drop of water on a slide. To her disappointment, she can barely make out the cells under the microscope. What might she do to improve her results?

1. When looking at Elodea under the microscope the green organelles appears to float around the edge, why don’t you see any in the middle of the cell?

1. What effect does increasing temperature have on enzyme activity?

1. With respect to #7, why does putting food in a refrigerator slow the rate of bacterial growth?

1. To verify that milk has protein, fat and sugar, what three tests could you perform?

1. How could the antibiotic sensitivity test be used to determine whether a particular drug is effective in treating a particular bacterial disease?

1. What kingdom is characterized by heterotrophic eukaryotic cells with cell walls and do not move?

1. What is a fungal fruiting body? Give the name of one fungal fruiting body.

1. What are the autotrophic protists (define)? Give one example.

1. Is the dominant generation for the bryophytes the gametophyte or the sporophyte?

1. Are the spores that fall from a fern sporophyte haploid (1N) or diploid (2N)? (Hint: They are going to develop into the gametophyte prothallus.)

1. Lichens are symbiotic relationships of what two groups of organisms?

1. Why must bryophytes be near water?

1. What is the microgametophyte of a gymnosperm called?

1. How are pine trees pollinated?

1. Sometimes we eat the endosperm of plants and sometimes we eat the ovary. What is the difference?

1. How might a dry fruit be dispersed? How might a fleshy fruit be dispersed?

1. Your neighbor’s vegetable garden is being attacked by Japanese beetles, so she dusts her garden with an insecticide. Now to her dismay, she realizes that the beans and squash are no longer producing. Explain to your neighbor the possible relationship among flowers, fruits (vegetables to the gardener) and these insects.

Extra credit: Name one bird species we saw on our walk