<u>Answer:</u>
The layer of the rock is older than the layer above it and younger than the layer below it.
<u>Explanation:</u>
According to the law of superposition, the layer which is above is always younger than the layer below it. This law is based on the very common fact that the older layer had to lay down first and then a new layer formed above it. This process is used to determine the relative age of the rocks.
In the development of a cancer cell, the formation of new blood vessels is called Angiogenesis, option B. When tumors are present in the body, circulation and the distribution of nutrients in the body is altered; thus, resulting in different kinds of disorders associated with cancer. With the presence of cancer, these tumors need more nutrients to spread and grow, which results in the formation of more blood vessels.
Answer: b. It only arrest growth of vegetative cells
Explanation: An antimicrobial agent is a substance that kills o control the growth of microorganisms, for humans this is very important in medicine or agriculture among others.
This agent should act quickly and being stable that help it to make it cheaper, also should not harm humans or other host of the microbial organisms.
The agent is not useful if only kills vegetative cells because it is not preventing the reproduction of the organism specially in fungi which use sexual reproduction as a backup for asexual cell division, so they will keep spreading across the host.
Answer:
Biogeochemical cycles are the various cycles that essential for the living organism. In these cycles, elements or compounds are moved between living and nonliving organisms. These cycles are interconnected to support life and move the energy and molecules into the loop. Examples of such biogeochemical cycles are the water cycle, carbon cycle oxygen cycle, and many others.
Carbon is an element that is important and moves in different spheres of earth including the atmosphere, geosphere, and biosphere. Similarly, water is a compound essential for living organisms and moves from the hydrosphere to living organisms and the atmosphere.
Answer:
We mean that a cell changes to another type of cell.
Explanation:
<em>Stem cells </em>are a type of cell that has the potential to become a specialized cell, this change or differentiation, is possible thanks to the activation or deactivation of certain genes that promote (or inhibit) the expression of certain proteins that origins different types of cells (fmuscle cells, osteocytes, neurons). This differentiation happens when the cells receive cues internally ( through signals or contact between a group of cells and another or through transcription factors) or externally.
Then, a differentiated cell is a cell that had gone under the previously described process.
I hope this information is useful to you!
