Chemical digestion involves the breaking down of food with enzymes;
mechanical digestion is breaking down food by chewing and tearing with teeth.
Chemical digestion is the breakdown of fats; mechanical digestion is the breakdown of proteins.
Chemical digestion is done only by the major structures of the digestive system; mechanical digestion is done by the accessory structures of the digestive system.
reproduction known as vegetative propagation. In the middle of the 1800s, a disease caused by a fungus
killed almost the entire lumper crop within two years. As a result, millions of people in Ireland died of starvation.
The most likely reason the potato disease was able to destroy the potato crop in such a short time is that the
(1) potato population lacked variations
(2) lumper variety had a long reproductive cycle
(3) lumper had several variations caused by vegetative propagation
(4) potato population in Ireland utilized all of the finite resources
The potato crop was likely destroyed quickly due to a lack of genetic diversity in the lumper potato population. All potatoes were virtually identical, thus none had resistance to the disease, leading to the rapid spread and devastation.
The reason the potato disease was able to destroy the potato crop in such a short time is likely option 1: the potato population lacked variations. In biology, this situation describes a lack of genetic diversity, meaning all individuals in the potato population were genetically identical or nearly so. Consequently, when the fungus that caused the potato blight appeared, it affected all lumpers in the same manner. If there had been more genetic diversity in the potato population, some individuals might have had natural resistance to the fungus and could have survived, allowing the population to recover more quickly.
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a clam basically extends with the fragile outer system frame, therefore it retracts after a while, one of the main reasons we retrieve pearls from shells and clams.
3. B. temperature variation
4. C. salt content
5. D. pH of water
Any change that might affect a link of the trophic web, will inevitably cause a cascade effect in the whole web. In the exposed example, the number of autotrophs is the biotic factor affecting consumers in an ocean ecosystem.
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In oceanicand terrestrial ecosystems, organisms build nets of varying levels of interaction known as the trophic webs.
The trophic web is a relationship process between different organisms, through which occurs transference of energy. The ones placed at lower levels pass energy to the ones at the higher levels.
Organisms at eachlevel feed on the preceding one and become food for the next one.
As it is a web, all organisms are equilibrated until a change occurs. When the change affects any of the involved links, there can be a cascade effect on the web. A change in a link population size (increasing or decreasing) will affect the superior links and the immediately anterior link.
Also, when two or more species are competing for the same source of food, a change in any of the population sizes will affect the other ones.
In the exposed example, we need to say which of the options are BIOTIC factors that affect consumers.
Among the options, there are temperature variations, salt content, and pH of water. All of them are significant factors that influence oceanic life. However, they are ABIOTIC factors.
The remaining option is the number of autotrophs. This option is a BIOTIC factor and is also the first link of many trophic chains.
Any change that might occur in this link -increasing or decreasing these populations-, will affect the whole system, beginning with their consumers.
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Related link: brainly.com/question/14381506?referrer=searchResults
The right answer is A), number of autotrophs.
c. gallbladder
b. appendix
d. rectum