During morphogenesis
a. cells divide.
b. cells grow.
c. cells migrate.
d. tissues fold over.
e. all of these occur.
Answer: e
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Answer the following statements true (T) or false (F)
1. A gene is any DNA sequence that is transcribed to any type of RNA. 2. In eukaryotic cells, a poly-A tail helps attach the ribosome to the mRNA molecule and may also determine how long the mRNA is retained within the cell. 3. Cystic fibrosis may be caused by a protein that does not fold correctly into its final form. 4. Because cells are very efficient in the processes that they carry out, very little energy is needed for the cell to make proteins. 5. In eukaryotic cells, an mRNA molecule can only be translated by one ribosome at a time.
You are reviewing population pyramids of different countries for an exam. The pyramid of a particular country has a very high number of individuals in the post reproductive category (ages 40 and up) and very few individuals in the group below the age of 20. In which category would you put the country?
1.Declining. 2.Stable. 3.Increasing. 4.There is not enough information to determine the appropriate category.
The pea plant was an excellent choice for Mendel’s
experiments because a. true-breeding varieties were available. b. the plant can self-fertilize. c. it can be cross-fertilized. d. true-breeding varieties were available, and it can be cross-fertilized. e. true-breeding varieties were available, the plant can self-fertilize, and it can be cross-fertilized
A monohybrid cross is made for flower color, where purple is dominant to white. Fifteen hundred F2 offspring are analyzed. How many white flowers are expected?
What will be an ideal response?