Chromosomal islands are presumed to have a "foreign" origin based upon three observations. What are these observations and how do they indicate that chromosomal islands are "foreign" in origin?
What will be an ideal response?
Answer: The presence of a sequence flanked by inverted repeats suggests transposition brought in the sequence. An island is also likely "foreign" when there is a dissimilar composition of bases (GC%) or a different codon bias. Lastly, chromosomal islands typically contain genes that are related in function, such as virulence or biodegradation.
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Which of the following properties of RNA is most directly responsible for its ability to form complex shapes?
A) the presence of uracil instead of thymine B) the fact that RNA is primarily double-stranded C) the relative instability of RNA compared to DNA D) the fact that RNA is primarily single-stranded E) the substitution of deoxyribose in DNA with ribose in RNA
Roundworms have organ system level organization in which groups of Organ work together to do a specific job
More questions all question are true or false 2. Plant cells have special structures that are not found in animal cells including a cell membrane a large central vacuole and plastids 3. Centrioles help organize chromosomes before cell division 4. Ribosomes can be found attached to the endoplasmic reticulum 5. ATP is made in the mitochondria . 6. Many of the bio chemical reaction of the cell occur in the cytoplasm. 7. Animal cells have chloroplasts organelles that capture light energy from the sun and use it to make food. 8. Small Hydrophonic molecules can easily pass through the plasma membrane 9. In cell level organization different cells are specialized for different functions. 10 The flagella on your lung cells sweep foreign particles and mucus to the mouth and nose. 11. Mitochondria contains its own DNA. 12. The plasma membrane is a single phospholipid layer that supports and protects a cell and controls what enters and leaves . 13. The cytoskeleton is made from thread like filaments and tubules.
Individuals with variations that make them best suited to their environment are, on average, more likely to ________
A) evolve B) change over time C) survive and reproduce D) be larger
The function of ribosomes is to make _______.
Fill in the blank(s) with the appropriate word(s).