Certain dyes change colour depending on whether they are in an acid solution or an alkaline solution . pH indicator is a chemical compound added in small amounts to a solution so the pH (acidity or basicity) of the solution can be seen. The pH indicator is a chemical detector for hydronium ions (HO) or hydrogen ions (H). Normally, the indicator causes the colour of the solution to change depending on the pH.
Typical indicators are , , , , and . They each change colour at different points on the pH scale, and can be used together as a universal indicator.
Another way is to use litmus paper, which is based on a natural pH indicators. The paper can tell you how strong the chemical is, whether it is a stronger acid or a stronger base.
Neutralization can be summed up by the equation:
Tapeworm
Tapeworms are the class Cestoda of segmented flatworms (Platyhelminthes). They are normally found in off the truck meat which means that they need another larger creature as an animal or human to be the host.
Tapeworms symptoms may cause weight loss and the host will become weaker.
Tapeworms can be up to 30 or 36 feet (10–12 metres) long. They eat by absorbing material directly through their epidermis (outside layer). The head of a tapeworm has four suckers and two rings of hooks. The body of a tapeworm is in segments (pieces that are like each other). Each segment can produce eggs. Little segments of the tapeworm sometimes break off and pass out through the stool of the host, with the eggs. Little segments of its body fall off. They go out of the host body, and are eaten by the next host, which is another type of vertebrate.
Tapeworms are hermaphrodite, with both sexes. Cross-fertilization occurs between two tapeworms in the same intestine. They have a life cycle with a secondary or intermediate host. For example, human tapeworms have cows or pigs as intermediate hosts. The 'definitive' host (humans in this case) is the one where fertilization takes place.
Tapeworms don't have a gut, so they have to absorb nutrients directly across their skin.
Omnivore
An omnivore is an animal whose species gets its energy and nutrients from a diet made up foods that include plants, animals, algae, fungi and bacteria.
Many omnivores change their eating habits during their life cycle. They are sometimes called "life-history omnivores", because they are only omnivores if their whole life is considered.
Some species, such as grazing waterfowl like geese, are known to eat mainly animals at one stage of their lives, but plants at another. Also, many insects, such as the beatle family Meloidae, eat animal tissue when they are larvae, but eat plant matter after they mature.
All of these animals are omnivores, but have different feeding behaviors and favorite foods. Being omnivores gives these animals more food security in stressful times. It also makes it easier for them to live in less consistent environments; (those that change along with the season, for example).
Humans, many pigs, many bears, some primates, some rodents, opossums, rails, rheas, most seagulls, and other animals are omnivores.
Herbivore
Herbivores are animals that only eat plants. They are "herbivorous" animals.
Herbivores (such as deer, elephants, horses) have teeth that are adapted to grind vegetable tissue. Many animals that eat fruit and leaves sometimes eat other parts of plants, for example roots and seeds. Usually, such animals cannot digest meat. But some herbivorous animals will eat eggs and occasionally other animal protein.
Some animals are frugivores because they eat mainly fruit. Browsers eat mostly leaves and sometimes small tree branches. Animals that eat mostly grass are grazing animals.
The diets of some herbivorous animals change with the seasons. In the temperate zones of the Earth, some seasons are hot and some are cold, so different plants are available at different times of the year.
Humans are omnivores, because they eat meat as well as plants. People who eat mostly plants are usually called vegetarian or vegan.
Plant cell walls are mostly made up of cellulose. No animal can digest cellulose by itself. They make use of gut flora, some of which produce an enzyme called cellulase. This is an example of symbiosis.
According to the theory of predator-prey interactions, the relationship between herbivores and plants is cyclic. When prey (plants) are numerous their predators (herbivores) increase in numbers, reducing the plant population, which in turn causes herbivore number to decline. The prey population eventually recovers, starting a new cycle. This suggests that the population of the herbivore fluctuates around the carrying capacity of the food source, in this case the plant.
There will always be pockets of plants not found by herbivores. This is important for specialist herbivores which feed on only one species of plant: it prevents these specialists from wiping out their food source. Eating a second plant type helps herbivores’ populations stabilize. Alternating between two or more plant types provides population stability for the herbivore, while the populations of the plants oscillate. When an invasive herbivore or plant enters the system, the balance is thrown off and the diversity can change or even collapse.
In some ways it is easier to be an herbivorous animal than a carnivorous (meat-eating) animal. Carnivorous animals have to find and catch the animals that they eat, and sometimes the animals that they want to eat fight them. Herbivorous animals have to find the plants that they want to eat, but they do not have to catch them. Many plants have some defence against herbivores, such as spines, toxins (poisons), or a bad taste. There are many more herbivorous animals living in the world than carnivorous animals.
Herbivores' effects on plant diversity vary across environmental changes. Herbivores could increase plant diversity or decrease plant diversity.
People used to think herbivores increase plant diversity by avoiding dominance. Dominant species tend to exclude subordinate species as competitive exclusion. However, the effects on plant diversity caused by variation in dominance could be beneficial or negative. Herbivores do increase bio-diversity by consuming dominant plant species, but they can also prefer eating subordinate species according to plants’ palatability and quality. In addition to the preference of herbivores, herbivores' effects on plant diversity are also influenced by other factors, defense trade-off theory, the predator-prey interaction , and inner traits of the environment and herbivores.
One way that plants could differ in their susceptibility to herbivores is through defense trade-off. Defense trade-off theory is commonly used to be seen as a fundamental theory to maintain ecological evenness. Plants can make a trade-off response to resource allocation, such as between defense and growth. Defenses against herbivory on plant diversity can vary in different situations. It can be neutral, detrimental or beneficial for plant fitness. Even in the absence of defensive trade-offs, herbivores may still be able to increase plant diversity, such as herbivores prefer subordinate species rather than dominant species.
The predator-prey interaction, especially the “top-down” regulation. The predator-prey interaction encourages the adaptation in plant species which the predator prefers. The theory of “top-down” ecological regulation disproportionately manipulates the biomass of dominant species to increase diversity. The herbivore effect on plant is universal but still significantly distinguish on each site, can be positive or negative.