b) ear and throat
c) eyes and nose
d) lungs and heart
Answer:
lungs and heart
Explanation:
lungs and heart is the answer because human lungs is use for gas exchange during respiration or while you breathe. When humans breathe, the lungs absorb oxygen from the inhaled sir into the blood and carbondioxide leaves the blood when we breathe out. The heart pumps the blood, and oxygenated blood are carried in the blood when air is inhaled and carbondioxide leaves the blood when you exhale. The blood carries nutrients and oxygenated blood. Therefore, lungs and heart work hand in hand in absorbtion of oxygen from it's environment.
Answer:
Life cycle is my answer
Explanation:
it might be wrong
The adult human skeleton usually consists of 206 named bones. These bones can be grouped in two divisions: axial skeleton and appendicular skeleton. The 80 bones of the axial skeleton form the vertical axis of the body. They include the bones of the head, vertebral column, ribs and breastbone or sternum.
Answer:
meiosis
Explanation:
Down syndrome is an abnormality that occurs on chromosomes 21, it occurs because chromosomes 21 cannot be separated in meiosis, the pair of chromosomes 21 do not separate and go together to one of the daughter cells. In this way, the oocyte or the resulting sperm will have 24 chromosomes instead of 23. When in conception that oocyte or sperm joins the germ cell of its partner that contributes the 23 chromosomes, the total sum of chromosomes that will have the first cell of the new conceived being will be 47.
Answer:
The mutation observed in the down syndrome occurred as a result of a abnormal and non disjuncted meiosis.
Explanation:
Howbeit, mutation can be described as any heritable change of the base-pair sequence of genetic material.
Down syndrome also described as trisomy 21 is a medical condition caused by a chromosomal excess, whereby the patients bear a certain resemblance to the Mongoloid race, such as a small head and tilted eyelids, and typically have a delay in cognitive ability and physical growth.
Meiosis is one that describes the cell division process of a diploid cell into four haploid cells, which develop to produce gametes.
The chromosomal mutation of nondisjunction in down syndrome describes how a pair of chromosomes is not fully separated during meiosis, resulting in the gamete having an extra chromosame (or none at all).
.
Answer:
Repetition
Explanation:
In science, the act of performing an experiment several times is called repetition. This involves obtaining multiple trials of an experiment in order to ensure accuracy and precision.
Multiple trials ensures that the best result which eliminates errors represents the findings.
Repetition gives a pool of important statistics to work with which can raise the confidence limit and provide more representation.
Answer:
repition
Explanation:
b. Medulla
c. Pons
d. Cerebellum
Answer: option C) Pons
Explanation:
Pons, or better still, the pons Varolii is a band of nerve fibers located within the brain stem. While, the brain stem is known to connect the spinal cord(Hind brain) to the fore brain
Thus, Pons extends through the hindbrain, midbrain, and forebrain.
Answer:
Reticular formation
It's correct