Platelets are cellular fragments
____________________ Indicate whether the statement is true or false.
T
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Which macromolecule did the majority of scientists favor as the "first" to be found in protobionts?
A. DNA. B. RNA. C. Amino acids. D. Proteins.
When lipids, phosphates, carbohydrates and RNA were placed on clay, a liposome was formed. Why was the clay an important surface for liposome formation and how is RNA associated with the liposome?
A. Clay acts as a catalyst for the formation of a liposome that can grow and divide. The RNA molecules are enclosed inside the lipid bilayer. B. Clay causes anions to stick together, while the cations are pulled from the carbohydrates. This chemical reaction causes the formation of a carbohydrate- and RNA-based membrane. C. The clay surface provides a nutritional media for the growing and dividing liposome. RNA is incorporated into the liposome as a transmembrane catalyst. D. The positively charged clay surface reacts with the negatively charged phospholipids to create a clay ball. RNA molecules adhere to the outside surface of the clay ball. E. Phospholipds react chemically with the negatively charged clay surface, creating an impermeable membrane. The RNA molecules WOULD be incorporated as part of this membrane.
There are two forms of human earwax: wet and dry. W is a dominant allele that produces wet earwax. In a sample of Swedes, you measure the following genotypes: WW= 810, Ww =180, and ww = 10 What is the allele frequency of W?
a. 10% b. 25% c. 50% d. 90%
What are the differences between primary and secondary succession?
What will be an ideal response?