Answer:
1- They have circular DNA, RNA and 70s ribosomes
2- They reproduce by binary fission
3- They can synthezise ATP
Explanation:
Mitochondria and chloroplasts are semi-autonomous organelles that are similar in many aspects:
- Both of them have a similar size with bacterias,
- Both of them have enzymes that synthesize ATP,
- Both of them have DNA, RNA, and 70s ribosomes, these last ones characteristic of prokaryotes. They are capable of synthesizing proteins. Their DNA is circular and double-stranded,
- Both of them reproduce by binary fission, as prokaryotes do.
Because of all of these characteristics, mitochondria and chloroplasts are suggested to be once free-living bacterias.
Given what we know about cellular transduction pathways, we can confirm that the option which does not represent a possible response of this kind from a cell is option D, mutations to genetic material.
The Transduction pathway describes the ways in which a signal is passed through cells. This can be seen as a series of molecular events which include:
- Changes to membrane permeability
- Changes in metabolism
- Liberation of ions
- Activation or deactivation of gene expression
However, one process which is never the direct or intended result of a cellular signal transduction pathway is the mutation of genetic material. Though mutations can at times be beneficial to an organism and even to entire species, more often than not this is not the case. The cells of an organism will rarely seek to purposely mutate genetic material and even less so during such common processes like signal transduction.
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c I think it is c have a good dsy
When a plant is not strong enough to support its own weight, the problem is the plant is not producing enough cellulose.
Option D
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Explanation:</u></h3>
A plant is unable to support itself when it is not producing enough cellulose.
Cellulose is a biochemical present in all living beings.
In the case of plants, cellulose is a critical component that is required by plants for their strength. Cells of a plant are surrounded by cell walls which are made tough due to the presence of cellulose in them.
Hence, the different parts of a plant such as a stem, branches, leaves, etc, are strong in nature.
When the amount of cellulose in a plant is less than it should be, the plant fails to support itself and starts bending.