The right option is; B. 7 major plates and many smaller plates
In the plate tectonics theory, the lithosphere is divided into 7 major plates and many smaller plates.
The plate tectonics theory is a scientific theory that explains that the Earth's lithosphere which is the rigid outer layer of the earth is made up of seven large continental and ocean sized major plates and many minor smaller plates. The movements of the plates are relative to each other and it usually ranges from zero to 100 mm per year. The interactions of the plates along their boundaries are thought to be the primary cause of majority of the earth’s seismic and volcanic activity.
An operon is a stretch of DNA consisting of an operator, a promoter, and genes for a related set of proteins, usually making up an entire metabolic pathway.
operon is a functional unit of gene.
This cluster of gene transcribed together to give a messenger RNA which further give rises to protein.
operator in operon is the site where repressor binds.
promoter is where Mrna binds , where our genes are transcribed
structural genes, they code for the enzyme that are involved in this metabolic pathway.
Operons have an important role to play as they produce protein for the cell this serves them energy, the protein is produced only when energy is required.
To know more about operon,
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Answer:
The correct answer will be options-B and D
Explanation:
Cytokinesis is the process of cell division which divides the cellular components along with the nuclear component. The cytokinesis takes place after the completion of M-phase which differs in both animal and plant cell.
In an animal cell, the cytokinesis begins by the formation of furrow which eventually pinches off to two cells.
The formation of the furrow is a complex process and requires the microtubules like an actin-myosin ring which gets established in which the actin filaments from the ring. The myosin filaments pull the actin filaments and then forms the ring.
Thus, options-B and D are the correct answer.
Answer:
"Lipids are an essential component of the cell membrane. The structure is typically made of a glycerol backbone, 2 fatty acid tails (hydrophobic), and a phosphate group (hydrophilic)."
Base on the given symptom and observance from the sixteen year
old, she has a deficiency of the vitamin b12 in which she could acquire from
meat products. She has a deficiency of this vitamin because she has not been
taking up meat products as she became a vegetarian.
