The water moves in the minute capillaries in plant roots, stem and leaves. The phenomenon of the movement of water in upward direction from the roots of the plant, up the stem and to the leaves is known as the capillary action.
The statement 'a crocodile-like animal is the ancestor of birds' is BEST supported by the information in the table (option A).
- Evolution refers to the biological process of descendence with modification.
- Evolutionary close species share functional and structural phenotypic features due to a same-origin during evolution.
- A crocodile is a reptile, and it has been shown that birds evolved from theropod dinosaurs (reptile).
In conclusion, the statement 'a crocodile-like animal is the ancestor of birds' is BEST supported by the information in the table (option A).
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Answer: B. the 5'-3' orientation of the polynucleotide strand .
The complimentary pairing of DNA molecules ensures 5' 3' and 3'[ 5 ' arrangement for correct pairing of purines and pyrimidine (Adenine E with thymine and cytosine with guanine) in opposite direction. .
RNA only contains five prime and three prime only, but DNA contains both 5'3' and 3'5'.
The correct option is human population, D. Excessive nutrients in the Chesapeake Bay is as a result of nutrients run off in urban areas where fertilizers are used for one purpose or the other. For instance, using fertilizers for lawns. All of these nutrients find their way into the Chesapeake Bay when rain fall and cause dense growth of algae. The process is called eutrophication.
The options that stipulate conditions about when excretion of a substance will occur are:
- Secretion is greater than reabsorption.
- Reabsorption is less than filtration and there is no secretion.
<h3>What is excretion?</h3>
Excretion is the removal of waste substances from the body. Often secretion takes place when there is an accumulation of waste in the human body. Reabsorption occurs when solutes and aqueous substances go back into the plasma.
If secretion ceases and filtration continues without reabsorption, we can expect excretion to occur. So, the first two options satisfy the conditions for excretion.
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