Amoebas use extensions of their cell membrane (called pseudopodia) to move, as well as, to engulf food. When the pseudopodium traps a bit of food, the cell membrane closes around the meal. This encasement forms a food vacuole. Hope this helps.
A. The Answer to this question is Mutation.
Answer:
This event is telling the evolution by natural selection. This is the directional selection where most adapted animals will survive. According to Darwin, the new species arise from a single ancestor due to variation.
It had also seen in the Finches. All the new species of Finches came from a pre-existing seed-eating Finch. When the environment was favorable the Finches were herbivore and feed on seeds.
When the number of birds increases, there is a competition between them. Because the food source was limited. To prevent this competition
some of them go for different foods like insects, fruits, etc.
This food habit change also changes their morphology and separate them from their ancestor.
Similar manner, when draught condition occurs, some of the seed-eating birds become carnivore to survive this new climate. As the environmental condition continues for a long time, the number of carnivore animals will increase in number.
Because due to drought conditions, the availability of seed will decrease. Thus the carnivore birds will be more in number and the herbivore birds will gradually eliminate, as they can't cope with the new climate.
Answer:
Regarding translation the following statements is <u>false</u>: The mRNA strand is read from 3' to 5' direction during translation.
Explanation:
The <em>primary structures</em> for protein synthesis are the ribosomes, organelles composed by the <em>association of proteins with rRNA and tRNA</em>. During translation, mRNAs are read in the 5´ to 3´ direction, and tRNA transfer amino acids to build the polypeptide chain. The <em>protein is synthesized</em> from the amino terminus<em> to </em>the carboxy terminus. Each amino acid is <em>specified by a </em>codon formed by three bases in the mRNA. mARNs have a<em> </em>start and end codon that tells the ribosome where to start and stop adding amino acids. When the ribosome reaches the end codon, it means that protein synthesis is finished.
The answer would be 20 amino acids found in living organisms
