Answer:
1) The origin of life. 2) The mechanisms of evolution. 3) The control of the size, both of the organs and of the living beings.
Explanation:
Some examples,
Are gender traits completely a result of societal expectations?
Are there any parts of the human body that get oxygen directly from the air and not from the blood?
Are there nuclear reactions going on in our bodies?
Can humans ever directly see a photon?
As the cell contains activated genes for the production of mitochondria, chloroplasts and a cell wall and inactive genes for root hair production, then it is a leaf cell.
- Leaf cells are different from other parts of the plant as they carry out photosynthesis for the preparation of food for plants.
- The chloroplasts present in leaves contain chlorophyll that helps in photosynthesis in the presence of sunlight using water and carbon dioxide. In this process, oxygen is released.
- Leaf cells contain many active and inactive genes.
- Leaf cells contain active genes for the formation of mitochondria, chloroplasts and a cell wall.
- Root cells contain the active genes for the formation of root hairs. But, chloroplasts are absent in root hairs as they do not have any role in photosynthesis. Roots are present inside the soil.
Thus, the leaf cell is the correct option as plant cells contain a cell wall and the leaf helps in the photosynthesis process.
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Answer:
all of the above
Explanation:
When the human genome was sequenced, one of the first information generated was related to the structure of the genetic material. For example, it has been found that there are long repeated sequences in different parts of the DNA or regulatory parts of its functioning in other parts of the genetic material itself.
When determining the order of nucleotides of a living being and comparing it with others of the same species, we find some regions that accumulate more differences than others, that is, are more diverse than others. Very similar sequences, that is, conserved in all living beings of the same species, can determine essential characteristics of these organisms. These essential characteristics can be very important for many different sectors and improve the lives of humanity in unimaginable ways.
The discoveries made through the complete sequencing of a genome can cause immense improvements in the fields of medicine, agriculture, biofuels and many other fields.
Option A. Increases and decreases of the heart rate result from changes in the activity of the <u>medulla oblongata</u>
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What is medulla oblongata ?
- Medulla oblongata, also called medulla, the lowest part of the brain and the lowest portion of the brainstem.
- The medulla oblongata is connected by the pons to the midbrain and is continuous posteriorly with the spinal cord, with which it merges at the opening (foramen magnum) at the base of the skull.
- The medulla oblongata plays a critical role in transmitting signals between the spinal cord and the higher parts of the brain and in controlling autonomic activities, such as heartbeat and respiration
- The medulla is divided into two main parts: the ventral medulla (the frontal portion) and the dorsal medulla (the rear portion; also known as the tegmentum).
- The ventral medulla contains a pair of triangular structures called pyramids, within which lie the pyramidal tracts.
- The pyramidal tracts are made up of the corticospinal tract (running from the cerebral cortex to the spinal cord) and the corticobulbar tract (running from the motor cortex of the frontal lobe to the cranial nerves in the brainstem)
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