Answer:
Municipal of sewage in water
Explanation:
The municipal sewage water has a large number of microbes present in it that leads to lower level of oxygen in water. The reduction of oxygen in water occurs due to decomposition of algae present in water by microbes. Algae is responsible for the production of oxygen from the process of photosynthesis. When they are removed from an environment then no more oxygen will be produced which leads to decrease of oxygen in water.
The functions of certain cells or organs are regulated by hormones, which circulate in the circulation.
Some basic characteristics of a hormone are:
- They are substances generated chemically by certain endocrine gland cells.
- Circulation carries them to the desired cells, tissue, or organ.
- They act according to their kind.
- They are present in incredibly small numbers. Most of them are soluble in water.
- They have a light molecular structure.
- After acting, they are destroyed.
- They are heterogeneous substances in terms of composition.
- They can't be kept for a very long period; typically, they are synthesized and secured as needed.
- Typically, they create hormone receptor complexes in target cells to activate them.
Learn more about the characteristics of hormones here:
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Answer:
1. Chromatin condense into chromosomes.
4. Homologous chromosomes pair up (formation of tetrads).
5. Homologous chromosomes separate and move to poles.
2. Sister chromatids separate.
3. Chromosomes unravel in to chromatin.
Explanation:
This question portrays the process of meiosis in a cell. The ordered sequence of events in the options are:
1. Chromatin condense into chromosomes - This process occurs in the Prophase stage. Prior to the cell division, the nuclear material is found as Chromatin material. This Chromatin material then undergoes condensation to form visible chromosomes.
4. Homologous chromosomes pair up (formation of tetrads) - This process also occurs during the Prophase stage of meiosis I. In this stage, homologous chromosomes (similar but non-identical chromosomes received from each parent) are paired up side by side to form a structure known as TETRAD or BIVALENT.
5. Homologous chromosomes separate and move to poles - This process characterizes the Anaphase stage of meiosis I. Homologous chromosomes are pulled apart to opposite poles of the cell by spindle microtubules.
2. Sister chromatids separate - After meiosis I, meiosis II involving sister chromatids instead of homologous chromosomes follows. In the Anaphase stage of meiosis II specifically, sister chromatids are pulled apart towards opposite poles of the cell.
3. Chromosomes unravel in to chromatin - After the whole division process i.e. karyokinesis (division of the nuclear material), the chromosomes begin to unravel to form the CHROMATIN threads once again. This process occurs in the Telophase stage of meiosis.
Answer:
stem cell
Explanation:
it has no specific function because can rise into any typical cell function
Answer:
Plant A is the control group.
Explanation:
Because it isn't being tested on, its the base for the experiment, something to compare the plants being tested on too.
