Answer:
The correct answer will be-
1. Nucleosomes
2. Chromatin
3. Sister chroamtid
4. Centromere
Explanation:
The DNA is a very long molecule which if has to be passed on to the daughter cell as it is will cause problems. So, to reduce problems a cell form tightly packed structure of DNA so that they can be passed easily to the daughter cell.
The packaging of DNA begins with the wrapping of the DNA around histone proteins which forms the 11 nm basic structural units called nucleosomes. The nucleosomes start condensing each other and form 30 nm structure chromatin fibres.
The chromatin fibres undergo replication during S phase which produces an exact copy of the chromatin called sister chromatids bound to each other at a central point called centromere which helps the separation of the chromatids during M phase.
Answer: B
Explanation: because birth and immigration is making the group bigger zero deaths and animals leaving
Answer:
a catalytic converter is device made up from metals like metals like palladium and rhodium to reduce the toxic gases emitted in the environment
Explanation:
Catalytic converter is an exhaust emission controlling device. It was made to reduce pollutants in air. Almost every automobile has a catalytic converter. It is present to completely remove the fuel that was not combusted and other toxic/dangerous compounds before they are let out in the environment.
If the catalytic converters are not used then the harmful compounds are released in the air and thus increasing air pollution and also decreasing the air quality for breathing in the surrounding environment.
