Answer: if change happens naturally in an ecosystem it will be better evolved to handle it. But at the expense it happens very slowly
Explanation: my answer
A human fetus develops at the mother’s body temperature. At birth, most newborns experience a drop in temperature, and their bodies must quickly do something about it. What they do is the same thing a hibernating mammal does as it rouses itself from its winter "snooze." During hibernation, an animal’s body temperature is low. In order to move about and take care of itself once awake again, the animal that has been hibernating must raise its body temperature. (William k. Purves et al., life: the science of biology) The definition is the primary pattern of organization in this passage.
This passage is explaining the process of hibernation and its importance in the animal life cycle.
To learn more about hibernation here
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Striated muscles contain repeating sarcomeres of overlapping arrays of long, thin actin and thicker myosin filaments. Myosin filaments contains the myosin heads, which are enzymes that can bind to actin, split and make use of the energy from ATP. When muscle contraction starts, myosin heads bind to actin, change their configuration on actin, liberating the products of ATP hydrolysis and causing slide of the actin and myosin filaments. The action of the proteins troponin and tropomyosin on the actin filaments regulates vertebrae striated muscle contraction. The release of calcium ions from the sarcoplasmic reticulum is triggered by the nervous stimulation which causes depolarization of muscle membrane. Calcium ions bind to troponin and thus cause or allow the tropomyosin strands on the actin filament to move so that the part of the actin surface where myosin heads need to bind is uncovered. Contraction then occurs and only stops when the sarcoplasmic reticulum pumps calcium out of the muscle interior.
So basically, what triggers the uncovering of the myosin binding site on actin is the calcium ions binding to troponin and changing configuration.
Answer and explanation;
The hydrophobic effect is the observed tendency of non-polar substances to aggregate in an aqueous solution and exclude water molecules. Hydrophobic interaction is mostly an entropic effect originating from the disruption of highly dynamic hydrogen bonds between molecules of liquid water by the non-polar solute.
Introduction of such a non-hydrogen bonding surface into water causes disruption of the hydrogen bonding network between water molecules.
Water dissolves molecules (proteins and nucleic acids) that display on their solvent-accessible surfaces groups that can h-bond [hydroxyl, carbonyl, ester groups; they're polar uncharged...also charged groups; protonated amines, carboxylates and phosphate ethers.
Molecules with internal h-bonds dissolve in water, some/all internal h-bonds may be in dynamic exchange with h-bonds in water
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Polar nature of water contributes to ability to dissolve non-ionic polar organic molecules, such as phenols, esters, amides; have large dipole moments and interaction with water dipole promotes solubility in water.
Decrease resource use methods might be used to decrease the rate of approach to carrying capacity by the developed world
<u>Explanation:</u>
Carrying capacity is the greatest quantity of people of a supplied species that an area's sources can support frequently without significantly spending or diminishing those resources. For communities which increase exponentially, growth begins gradually, starts a fast maturity phase and then straightens off when the carrying capacity for that species has been touched.
The proportion of the population then shifts somewhat above or below the carrying capacity. Reproductive lag time may produce the population to exceed the carrying capacity temporarily. The carrying capacity may be reduced by resource leveling and disgrace during an overshoot period or spread through technological and social changes.
