Which of the following lists the correct pathway of blood through the circulatory system?
A) Left ventricle, aorta, systemic circuit, vena cava, right atrium, right ventricle, lungs, left atrium
B) Right ventricle, aorta, systemic circuit, vena cava, left atrium, left ventricle, lungs, right atrium
C) Right ventricle, vena cava, systemic circuit, aorta, left atrium, left ventricle, lungs, right atrium
D) Left ventricle, vena cava, systemic circuit, aorta, right atrium, right ventricle, lungs, left atrium
Answer: A) Left ventricle, aorta, systemic circuit, vena cava, right atrium, right ventricle, lungs, left atrium
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A true-breeding pea plant with smooth pods is crossed to a true-breeding pea plant with constricted pods. The offspring of this cross all have smooth pods. This indicates that
_____ constricted is dominant and smooth is recessive. _____ smooth is dominant and constricted is recessive. _____ constricted and smooth are not alleles. _____ constricted and smooth are variants of the same gene.
The process of moving water through a plant by transpiration works because water molecules stick to each other with
A. turgor pressure. B. osmosis. C. ionic bonds. D. adhesion. E. hydrogen bonds.
Suppose a scientist working on a new drug for cancer developed a chemical that irreversibly breaks the hydrogen bonds in the DNA molecules within cancerous cells but leaves all of the covalent bonds intact
Hydrogen bonds are relatively weak compared to covalent bonds, and they are routinely broken and reformed as the DNA molecule is replicated in a normal cell. Their stability is nonetheless critical for maintaining certain aspects of the structure and function of the DNA molecule. Based on this scenario and your knowledge of DNA, how would this newly discovered chemical affect the "molecule of heredity" in a human cancer cell? A) It would break the individual strands of the DNA molecule apart, preventing it from functioning normally. B) It would result in constant DNA replication within the cell. C) It would break the two strands of the DNA molecule apart, preventing it from functioning normally. D) It would allow the DNA molecule to function normally except during replication.
Evaluate and explain the importance of positional information and morphogens in induction
What will be an ideal response?