Answer:
Explanation:
Over the past 250 year or two and a half centuries fossil fuels have been burnt at a very fast rate to meet the various human needs. These fossil fuels contains huge amount of carbon dioxide. And when these fossil fuels are burnt in power factories, power plants, cars etc. carbon moves from the fossil to the atmosphere. And since carbon dioxide is a greenhouse gas it traps more heat and hence there is a global temperature rise.
It is estimated that every year almost five and a half billion tons of carbon is released by burning fossil fuels. And since this amount of carbon dioxide is very huge for plants to convert all of them into oxygen via photosynthesis it leads to disbalancing in the carbon cycle that is more carbon dioxide is produced than the amount can be utilized which finally leads to rise in Earth's temperature as all of the extra carbondioxide ends up in Trapping more sun light.
Plants roots display positive gravitropism which means they grow in the direction of gravity
A. Interphase.
The cell makes a copy of DNA during the S-phase which is in the interphase. An easy way to remember this is by realizing that the S stands for synthesis and DNA Synthesis is what it is called.
Answer:
Body size: The Emperor Penguin has larger body size compared to that of the Galapagos Penguin as a structural adaptive feature for heat regulation in their different environment.
Explanation:
The emperor penguin and the Galapagos Penguin, both live in different contrasting environments. Emperor penguins are found in cold habitats while the Galapagos Penguins are found in warm habitats. Both have evolved differently by developing several unique characteristics to make them adapt well to their different environment. Regulation of heat is one of the challenges they have to deal with to survive in their habitat. In doing this, both have evolved differently in the following ways:
The Emperor penguin: The large size of the emperor penguin’s which makes them have low smaller surface area in relation to volume. This helps it to retain heat and survive extreme cold temperatures in its environment.
The Galapagos Penguin: It has a small body size with a larger surface area in relation to its volume, which enables it to lose body heat more efficiently than the Emperor Penguin.
Genotypic ratio of offsprings will be homozygous tall : heterozygous tall =1:1.
Tt and Tt if crossed will give 25% progenies as short.
<h3><u>Explanation:</u></h3>
The cross given here is a cross between the two plants, one of which is homozygous tall and other is heterozygous tall plant.
The genotype of the homozygous tall plant = TT.
So, gametes produced from the plant = T.
Genotype of the heterozygous plant = Tt.
So the gametes produced from the heterozygous plant = T and t.
These gametes are written in the Punnett square which gives the offsprings TT, TT, Tt and Tt.
Thus all the offsprings are tall, but the Genotypic ratio is TT:Tt = 1:1.
If Tt and Tt are crossed then 25% of the progenies will be short.
