True
Surface mining is more ecologically damaging than subsurface mining. This is true. Surface mining includes strip mining, mountaintop removal mining. It is a broad category of mining in which soil and rock overlying the mineral deposit are removed.
Answer: C) genetic diversity
Explainiton : Crossing over is essential for the normal segregation of chromosomes during meiosis. Crossing over also accounts for genetic variation, because due to the swapping of genetic material during crossing over, the chromatids held together by the centromere are no longer identical.
The Endoplasmic reticulum is the organelles that is involved in the synthesis of oils.
<u>Explanation:</u>
The endoplasmic reticulum is of 2 types that is the ''smooth endoplasmic reticulum'' and the ''rough endoplasmic reticulum''. The rough endoplasmic reticulum is lined with ribosomes whereas the smooth endoplasmic reticulum is plain.
Since ribosomes are present the rough endoplasmic reticulum is involved in protein synthesis whereas the smooth endoplasmic reticulum is involved in the production of oils or lipids that are required for the cell.
D .............. im pretty sure its this one :)
<u>Answer:</u>
Part of a strand of DNA with regulatory sequences is Lac gene.
<u>Explanation:</u>
- Genes are the part of DNA that helps in development of traits of individual and helps in inheriting characteristics to offspring.
- In Lac gene(operon, which is fundamental unit of DNA) gene regulation (first genetic regulatory mechanism) was clearly observed for the first time.
- Lac gene is a gene that is required for the 'breakdown of lactose' and also helps in transporting of it.
- There are types of lac genes differing in structure are: LacA, LacY, LacZ.