The clear explanation for the forces mentioned in the question given below
Explanation:
1.A non-contact force that is generated between charged objects is known as "Magnetic force" eg: train tracks, new roller coaster, a compass, motor.
2.A non-contact force that is generated from moving charges is known "Electrical force". eg: Electric charge in a bulb.
3. A non-contact force that exists between objects with mass is known as "Gravitational force". eg: The force that causes apple to fall down from trees, The force thatt makes us to walk instad of floating.
4.A force that requires physical contact between objects is known as "Contact force". eg: moving a chair or table across a room, kicking a ball
1/4 recessive can be expected for the recessive trait of mono hybrids from the F2 generation.
Option D
<h3><u>
Explanation:</u></h3>
Mono hybrid cross is defined as the crossing between two plants considering the two different alleles of a particular character. It was 1st performed by Father of Genetics, Sir Gregor Mendel. The mono hybrid cross done by him considered the character tallness of garden pea plants, of which one was tall and other was short.
He crossed them to get all tall plants in 
Filial generation. Now as he self bred those plants, he got the tall and short plants in ratio of 3:1. Thus he proved that the recessive trait of mono hybrids is 
of the total population of F2 generation.
The midbrain
The term mesencephalon means "midbrain." As it develops from a primary brain vesicle to a secondary brain vesicle and finally an adult brain structure, it retains its name--the midbrain.
It means that two chromosomes
have the same genes, or variations fo the
same genes at the same loci on the chromosomes. Variation
of the same gene is what makes up
alleles. Homologous chromosomes
are similar in size and structure. In
diploid organisms, each chromosome in the pair is derived from each parent.
To activate the kinases, cyclins connect to them. The activity of cyclin-dependent kinases changes with cyclin concentration. At the G2 phase, Cyclin and a Cdk unite to start mitosis (M phase). This mixture produces MPF (maturation-promoting factor), which encourages the cell to continue mitosis through the M phase. The cyclin is broken down at the G1 phase, and the Cdk is recycled.
<h3>What about cyclins?</h3>
- A family of regulatory proteins known as cyclins manages how the cell cycle develops.
- Cyclins cause the phosphorylation of cyclin dependent kinases (CDKs), which regulate the cell cycle.
- A target protein will attach to a complex made up of a cyclin and a CDK, and the complex will phosphorylate the protein.
- Cyclins collaborate with an enzyme family known as the cyclin-dependent kinases to control the cell cycle's activities (Cdks).
- A Cdk that is not bound to a cyclin is inactive, but when it is, it becomes a functioning enzyme that can alter target proteins.
- By phosphorylating and inactivating target substrates, cyclins are the regulatory subunits of holoenzyme CDK complexes that control progression through cell-cycle checkpoints.
- Cyclin-dependent kinases (CDKs) are protein kinases that require a distinct subunit - a cyclin - that provides domains necessary for enzymatic action.
- The cyclins associate with various CDKs to offer specificity of function at various stages during the cell cycle.
- In response to various extracellular and intracellular signals, CDKs modify transcription and play significant roles in the regulation of cell division.
Learn more about cyclins here:
brainly.com/question/931366
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