Answer:
Volcanoes
Explanation:
Sulfur can be found everywhere but mostly near active volcanoes.
Answer:
I believe through 'Natural Selection'. This occurs through the following steps
1) Genetic Variation
2) Over-Production
3) Struggle for existence
4) Survival of the fittest
5) Advantageous characteristics passed on to offspring
Hope this answered your question.
Answer:
A) increasing frequency of action potentials only.
Explanation:
If the muscle fibers begin the contraction with the sarcomere too elongated, the thick and thin filaments would be barely overlapping, forming few crossed bridges. On the contrary, if the sarcomere is too shortened so that the thick filaments reach the z-disks, the myosin is unable to find new fixation sites for cross-bridge formation and the tension decreases rapidly.
But to better understand how the contraction force increases, it should be noted that a single contraction does not represent the maximum force that a muscle fiber can develop. <u>The force generated by the contraction of a muscle fiber is increased, increasing the frequency with which the action potentials of the muscle stimulate said fiber,</u> that is to say that the nervous system controls part of this.
A potential muscular type action lasts between 1 and 3 ms. While muscle contraction can last 100 ms. If the repeated action potentials are separated by prolonged intervals of time, the muscle fiber has time to fully relax between the stimuli. If the action potentials continue to stimulate muscle fiber repeatedly at short intervals (high frequency), the relaxation between contractions decreases until the muscle fiber achieves a state of maximum contraction known as tetanus.
Answer:
Explanation:1. Fossil and other evidence indicates that the first major innovation in hominid evolution was: ______
a. increased brain size b. tool making c. material culture d. bipedal locomotion
Answer:
e. 1/2; semiconservative
Explanation:
1/2 (proportion) of DNA molecules (each molecule is double stranded not single stranded) will contain any radioactivity after two rounds of replication.
This experiment also demonstrates that replication is semiconservative
.
DNA replication is semi-conservative because each helix that is created contains, one strand from the helix from which it was copied.