Several sources have noted that Vitamin D is more of a hormone than a nutrient. The substance controls the concentration of calcium that is present in our system especially in the blood. The hormone is essential and vital in strengthen bones.
Hence, the answer to this item is letter A. True.
These two statements imply that an entity is considered as a living organism has at least one cell (the basic unit of life). It could be eucaryote or procaryote, unicellular or pluricellular. It has his own metabolism and its own genetic material.
Prions, viruses, and bacteriophages are not considered as a living organism, because they are technically not a cell, and does not all the property and the structure of a cell.
Answer:
d. tissue
Explanation:
There are several levels of organization of life which starts from the functional unit of life called cell.Cells are made of a combination of macromolecules that consist of atoms. Several cells associate together to perform one or more specific functions at the tissue level. The tissue level is made up of similar cells that carry out similar task or functions. The robot’s cardiac cells that work together in synchrony could be considered at the tissue level.
Answer:
d. 40, B.4 unique
Explanation:
If 10 cells underwent meiosis, the result would be 40 daughter cells. This is because a cell that goes through meiosis goes through two divisions resulting in 4 daughter cells. This is because cells that undergo meiosis are gametes so they need to have half the number of chromosomes as the cells that go through mitosis.
The resulting daughter cells are unique, unlike the cells that go through mitosis. This is because the chromosomes in the cells experience something called crossing over during Metaphase I. Crossing over is when the chromosomes can swap pieces of DNA when next to each other. Cells in mitosis don't go through crossing over and are therefore identical.
Answer:
Response of the postsynaptic cell is dependent on the neurotransmitter release
Explanation:
Calcium (Ca2+) is essential for the propagation of the action potential since it is required for neurotransmitter release. When an action potential reaches the end of an axon, voltage-dependent Ca2+ channels open and Ca2+ ions bind to regulatory proteins, thereby initiating the release by exocytosis of neurotransmitters contained in the presynaptic vesicles at the synapse and modulating the transmission of a signal to another neuron (i.e. the postsynaptic site).
