Alternative splicing is:
A) converting an exon into an intron.
B) removing exons and retaining introns.
C) removing introns and retaining exons.
D) when a single primary transcript is edited in different ways to yield multiple mRNAs.
Answer: D
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Answer the following statements true (T) or false (F)
1. If a cell contains 20 units of DNA during G2, it will have 40 units of DNA during S. 2. During prometaphase, the sister chromatids organize into a single row in the center of the cell. 3. A cell undergoing meiosis that contains sister chromatids may be either haploid or diploid. 4. One major difference between metaphase I and metaphase II is the presence or absence of bivalents. 5. Sexual life cycles include both haploid and diploid stages.
You have been assigned to conduct a scientific study on the effects of four types of fertilizer on broccoli growth. You visit several broccoli farms to make observations and use these observations to find preliminary correlations and form hypotheses. To test your hypotheses, you set up five plots of broccoli - one plot for each fertilizer type plus a control plot, which is not fertilized. When you meet with your professor to discuss your progress, he tells you that your project is missing an important component of the scientific method. What is missing?
A. Testing biotic factors such as herbivore abundance B. Replicating each fertilizer treatment in multiple plots C. Using more than one plant species so your conclusions can be more broadly applied D. Testing the fertilizer in a natural setting on wild relatives of broccoli E. Setting up plots that receive more than one type of fertilizer
The bird’s nest fungus utilizes __________ to distribute its spores
a. insects b. rain c. wind d. all of these
In humans, the sex of an offspring is determined solely by the chromosomes donated by the male parent
Answer the following statement(s) true (T) or false (F)