Answer:
Pyloric sphincter
Explanation:
The duodenum is the first section of the small intestine, it is connected to stomach by pylorus (which means "gatekeeper"). The pylorus ends as the pyloric orifice which is surrounded by a band of muscle named "pyloric sphincter" it is located exactly in the junction between stomach and duodenum.
Answer:
b.Photosynthesis
Explanation:
as plants produce 02 in the presence of light
The two features are four limbs and lungs. These features were essential for animals to move from aquatic to land.
Lobe-fins are not common among the living fish and are only exhibited by the lungfish and coelacanth. However, the lobe limbs are exhibited by various living species, like humans. This is due to the fact that all the tetrapods, that is, four-limbed vertebrates, share a more recent common ancestor with the lungfish and coelacanth.
Tetrapods evolved from a group of species, which were aquatic and exhibited scales and fleshy fins. However, they also had lungs, which they used to breathe oxygen. About 360 to 390 million years ago, the predecessors of these species started to thrive in shallower waters and finally moved to land.
With this, they experienced natural selection, which assisted various adaptations for a terrestrial way of life. The modern humans still persist the proof of the aquatic past in the manner the arms and legs are attached to the body.
C. Group 4 is the right option. Because RNA molecules are working copies that can tolerate a few errors, it is commonly accepted that RNA pol. does not need to proofread.
The polymeric molecule ribonucleic acid (RNA) plays numerous biological roles in the coding, decoding, regulation, and expression of genes. The two types of nucleic acids are RNA and DNA. The four main macromolecules required for all known forms of life are lipids, proteins, carbohydrates, and nucleic acids. The building blocks of RNA are nucleotides, just like DNA, however unlike DNA, RNA exists in nature as a single strand folded over itself rather than a paired double strand. Using the nitrogenous bases guanine, uracil, adenine, and cytosine, cellular organisms use messenger RNA (mRNA) to transmit genetic information.\
Learn more about RNA here
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1) there will many places suffering from drought
and there would be less moisture
2) water used for motels, hotels, restaurants, office buildings and institutions