Plants that live in the rainforest have many adaptations to their environment. Some plants such as vines have adaptations which allow them to attach themselves to the trunks of trees. These adaptations allow vines to successfully compete for which of the following limiting resources in the rainforest?
A. sunlight
B. water
C. carbon dioxide
D. oxygen
Answer: B. water
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The muscle pictured above would most likely be found where in the body?
A. attached to the skeleton B. in the heart C. in the walls of the blood vessels D. in the intestines E. in the lungs
Which of the following are principles of the cell theory or cell doctrine?
A. All living things are composed of one or more cells. B. Cells are the smallest unit of living organisms. C. New cells come only from pre-existing cells by cell division. D. Cells are the smallest unit of living organisms and new cells form from pre-existing cells by cell division. E. All living organisms are composed of one or more cells, cells are the smallest units of life, and new cells come only from pre-existing cells by cell division.
Some restriction enzymes cleave DNA in such a manner as to produce blunt ends. Ligation of blunt end fragments is most often enhanced by the use of the enzyme terminal deoxynucleotidyl transferase
Speculate on the function of deoxynucleotidyl transferase in terms of using blunt end fragments in cloning.
Answer the following questions true (T) or false (F)
1. Generally, purines and pyrimidines are not synthesized de novo but rather obtained through salvage pathways to recycle them from food because de novo synthesis has a high energy cost. 2. Usually, a single biochemical test is all that is needed to identify an unknown microbial sample. 3. Chronic diseases have a rapid onset and progression.