Answer:
Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).
Lazzaro Spallanzani's experiment<span> is a good example of creativity because he designed the experiment and found a new way to explore gastric juices.</span>
Lazzaro Spallanzani, an Italian biologist and physiologist, was the first scientist to dissect animals for digestion trials. He used the animals as models for humans digestive system, designed the experiment, and was the first to interpret the process of digestion.
Answer:
No of three on the dice = 1
No of total outcomes = 6
Probability = no. of favourable outcome / no of total outcomes
Probability of 3 = 1/6
<span> All you have to do is take the number of moles you have a multiply by the molar mass. The number of moles is given. To find the molar mass, add the atomic weights that make up your molecule.
Four hydrogen = Four amu (4*1)
Two carbon = 24 amu (2*12)
Two Oxygen = 32 (2*16)
Summing these, we have a molar mass of 60 grams/mole.
Multiply this by the number of moles and we get:
60(g/mol) * 1.26*10^-4 mol = .00756 g. </span>
Answer:
to enable the membrane to stay fluid more easily when the temperature drops.
Explanation:
The lipid bilayer is made of amphipathic phospholipids. The non-polar tails of phospholipids make the core of the membrane while the polar heads are exposed to the surrounding watery medium. At lower temperatures, tight packing of non-polar tails makes the membrane more rigid. Cholesterol is an amphipathic polar head group and non-polar steroid nucleus and hydrocarbon chain.
Interaction of non-polar part of cholesterol with non-polar tails of membrane phospholipids makes the membrane less rigid at lower temperatures. Thereby, cholesterol serves as an important structural component of membranes of some organisms such as animals and helps maintain the fluidity of the membrane at lower temperatures.
