1.) D
2.) A,B
3.) 1) A saturated salt solution is definitely hyper tonic.
2) Depending on the cell and the salt, there will be an isotonic concentration, where everything is balanced.
4) 1) Water tends to enter the Paramecium.
This is a process of passive transport.
This is a case of osmosis. In osmosis the SOLVENT travels from a region of low solute density to region of high solute density.
2) Paramecium have what is called a contractile vacuole which contracts forcing water out to keep a stable osmotic pressure in the cell. Considering the vacuole would need to use energy is would be active either way
Answer: c. Biofilm
Explanation:
Metabolic cooperation between prokaryotes
allows them to use the resources that they could not use when they are living as single cell. Bio film is the example of the metabolic cooperation.
Bio films are formed by the colonizing of single type of prokaryote such as bacteria and they facilitate the growth of other bacteria on the surface by secreting the substances essential for their growth.
Hence, the correct option is (c) biofilms.
C. Neurosecretory cell in the ehypothalamus
Answer:
A collection of cloned DNA fragments representing an organism's entire genome is called a genomic library.
Explanation:
A genomic library has been created with the aim of studying the genome of species in detail, and consists of taking cloned DNA fragments that are inserted into bacterial colonies, which together are part of the complete genome of a species.
The characteristics of a genome library are:
- <em>The library must contain the entire genome.
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- <em>The sequencing of each fragment of the genome must be independent, to avoid errors.
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- <em>The integrity of each fragment must be preserved, avoiding alterations to it due to recombination.
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The DNA used in the construction of the library is included in a carrier molecule called a cloning vector.
Learn more:
Genomic library brainly.com/question/842484
