Ethylene
Ethylene is a hydrocarbon chemical emitted from most
fruits that promotes ripening. When fruits are bunched together this
creates more ethylene and thus ripens each fruit faster. The more fruits
are bunched together, the more ethylene is produced and the faster all
the fruits ripen - this is why sometimes the fruits at the bottom of a
carton are much riper than at the top, because they are soaked in
ethylene.
Seedless vascular plants are classified into three phyla namely the club mosses, horsetails and ferns. Ferns form the numerous seedless plants with true vascular tissue, creeping underground stems called the rhizomes and large leaves called the fronds. They reproduce via spores.
Ferns crowd on the forest floors even after cutting them down. They invade the cleared zone of forest which has been cut for timber via numerous spores. The spores are in clusters called sori on the underside of the leaves. The spores develop into haploid gametophytes by mitosis. They also grow by spreading their rhizomes or from the tips of their fronds.
Answer:
B. Australia is isolated
Explanation:
They originated in South America and spread throughout the world, but due to competition on other continents, the other marsupials died out, while the ones on Australia lived.
The answer is <span>A. Biodiversity
</span>
<span>Biodiversity is the variety of life in The world, a particular habitat, or ecosystem.</span>
The genotype of the guinea pig that you would want to mate it with the black one is ww, which is also a white guinea pig, as all white guinea pigs must have the genotype ww as w is recessive to b. Also, make sure you know that the black guinea pig should have the genotype of bx, where x is either b or w.
So, if you mate the black guinea pig with the ww guinea pig (white), the offsprings will either be all black, or half black half white.
If the offsprings are all black, you can be sure that the black guinea pig (parent) will have the bb genotype. As each offspring must receive one gene from each parent, so if all the offsprings have black fur, they must have one b gene from the black guinea pig.
On the other hand, if the offsprings are half black half white, the genotype of the black guinea pig (parent) should be bw. This is because in order to have white offsprings, each parent must pass on a w gene so that the offspring would have genotype ww, white.
