15 Answered Questions for the topic life science
What happens during muscle contraction in a muscle fiber?
I basically want to know what happens microscopically in a muscle fiber when muscle contraction occurs?
suppose 16 coins are tossed. find the probability of getting the following result using the binomial probability formula and the normal curve approximation.exactly 4 heads.use the table of areas... more
the mean clotting time of blood is 7.45 seconds with a standard deviation of 3.6 seconds. what is the probability that an individual's clotting time will be less than 4 seconds or greater than 9... more
Tomaso Kampanela and Thomas More created their own patterns of “perfect societies”. Why these teachings were named “utopias”?
How do you think can a good peaceful social idea be transformed into something negative in real life?any examples (from world history/movie).
Describe the difference between gene and chromosomal mutations, and how mutations in gametes may result in phenotypic changes in offspring.
How do scientists perform intercellular colonization of non-leguminous plants by rhizobia? How do they make the bacteria enter the said plants?
health issue in pakistan
a lot of health issue in Pakistan silent killer called hypertension, rate of hypertension increase day by day which are the root of cardiovascular disease how we control hypertension?
Compare and contrast two such stabilizing mechanisms in humans that are under hormonal control and two that are not.
In order to remain healthy, humans must be able to keep their bodies in a stable condition even when the outside environment is very different. Sometimes hormones are used to accomplish this but... more
Gamete formation and fertilization in angiosperms
Explain what is different about gamete formation and fertilization in angiosperms (compared to vertebrates) that results in the fruit containing triploid endosperm when triploid tissues are not... more
What purpose is served by the pulmonary arteries mammals have versus those of amphibians?
Compare and contrast a mammal’s blood circulation and a frog’s blood circulation that results in only deoxygenated blood in the pulmonary arteries of a mammal but partially oxygenated blood in the... more
Mitosis and meiosis in hybrid animals
Consider two closely related species—Species A and Species B. Species A and B will mate with each other in captivity, and often produce healthy offspring. However, the hybrid offspring are usually... more
This is an easy one, I'm just bad at math.
If 100 grams of cocoa powder have 430 calories, how many calories do 7 grams of cocoa have?
Jasmine bought two dozen roses for $31.20. How much did she pay per rose?
I have no idea what I am doing....................some please help me
Life Science Science
Dinosaurs became extinct nearly 65 million years ago...
Dinosaurs became extinct nearly 65 million years ago... Q1: Define mass extinction. An: I got no idea. please help. Q2: State a type of evidence that suggests dinosaurs once existed. An:... more
nitrogen fixing bacteria
Where does nitrogen fixing bacteria live? Is it root hairs or root nodules?