Answer:
The mitral valve has fewer flaps than the right atrioventricular valve:
<em>a) True </em>
Explanation:
The mitral valve is a bicuspid valve, which means it has two flaps; whereas, the right atrioventricular valve is a tricuspid valve and so has three flaps.
These two heart valves link the atrium with the ventricles. The mitral valve is located on the left side of the heart, while the tricuspid valve is on the right side.
Answer:
inhaled poison
Explanation:
Grimaldi was inside the bathroom when Jayla sprayed the aerosol bleach cleanser. The molecules of this cleanser spread quickly through the surroundings. Since the cat was inside the bathroom, <u>it could have inhaled the bleach and the poison reached its lungs.</u> This caused symptoms of <u>wheezing</u>, which is<em> respiratory</em> in nature, and shaking (seizures). Inhaling a poison leads to <em>difficult in breathing </em>among animals because it can cause the lungs to be inflamed.
Answer:
Anthropology is the study of what makes people human. Completing a degree in anthropology will allow you to investigate the complexities of human beings. Anthropologists look into different people's lifestyles, how the human species has evolved and how humanity's past has impacted on the present
Explanation:
i love this subject
Answer:
Okay
Explanation:
Human topoisomerase I plays an important role in removing positive DNA supercoils that accumulate ahead of replication forks. It also is the target for camptothecin-based anticancer drugs that act by increasing levels of topoisomerase I-mediated DNA scission. Evidence suggests that cleavage events most likely to generate permanent genomic damage are those that occur ahead of DNA tracking systems. Therefore, it is important to characterize the ability of topoisomerase I to cleave positively supercoiled DNA. Results confirm that the human enzyme maintains higher levels of cleavage with positively as opposed to negatively supercoiled substrates in the absence or presence of anticancer drugs. Enhanced drug efficacy on positively supercoiled DNA is due primarily to an increase in baseline levels of cleavage. Sites of topoisomerase I-mediated DNA cleavage do not appear to be affected by supercoil geometry. However, rates of ligation are slower with positively supercoiled substrates. Finally, intercalators enhance topoisomerase I-mediated cleavage of negatively supercoiled substrates but not positively supercoiled or linear DNA. We suggest that these compounds act by altering the perceived topological state of the double helix, making underwound DNA appear to be overwound to the enzyme, and propose that these compounds be referred to as ‘topological poisons of topoisomerase I’
