“Understand the key concepts of Growth and Development, focusing on the physical, biological, and psychological changes that occur throughout life.”
Biology Notes for Class 12 chapter 5
Which one of the following condition is resulted from excess GH in adults: Acromegaly
Parathyroid hormone acts to ensure that: Calcium levels in the blood never drop too low
In chordates the healing of fracture and repair of a skin wound are some other examples of: Regeneration
During elongation the cell volume increase up to 150 fold due to uptake of: Water
If lobster loses its pincer claw a new claw: Regenerates
An ordered sequence of irrversible steps with each step setting up the necessary conditions for the next step is: Development
Primary tissue is added by the: Apical meristem
in plants regeneration is the basis of plant: Reptiles
Deficiency of vasopressin or ADH by the pituitary gland leads to a disorder in which the patients kidney have lessoned ability to absorb water is: Diabetes insipidus
For maximum growth the optimum temperature is 25 – 30oC and it least at: 5 – 10oC
The Syndrome which is an example of trisomy of the sex chromosome is: Klinefelter’s syndrome
In humans ,MSH(melanocyte-stimulating hormone): Regulates primary skin color
Which of the following hormones is not released by the anterior pituitary: Melanocyte – releasing hormone
In the chick the mesodermal cells migrate and caudally from both sides and create a mid line thickening called: Primitive streak
From Hensen’s node,dorsal mesoderm is formed and is organized into: Somitcs
The negative physiological changes in our body are said to be: Agning
Oxytocin is secreted by the endocrine gland named: Pituitary gland
On the basis of structure and shape of the cap,two species of Acetabularia have been identified: A.crenulata & A.arabica
The addrenaline cortex produces: Aldosterone
In addition to auxin which hormone also play important role in apical domince: Cytokinins
In incubating eggs artificially the incubators are usually regulated at temperature between: 36 – 38oC
_______ regulates the kidney’s retention of water: Vasopressin (ADN)
Which prosess is characterized by movement and rearrangement of cells in the embryo: Gastrulation
Clear cytoplasm produces: Larval epidermis
A plant has a growth pattern called: Open growth
During gastrulation the blastoderm splits into two layers, an upper layer of cells is called: Epiblast
The human life is judged to be maximum of: 120 -175 years
The discoidal cap of cells above the blastocoel is called: Blastoderm
Which prosess is characterized by movement and rearrangement of cells in the embry: Gastrulation
Which one of the following condition is resulted from excess GH in adults: Acromegaly
Clear cytoplasm produces: Larval epidermis
The removal of apex release that lateral buds from the apical dominance. It is called: Compensatory effect
In humans ,MSH(melanocyte-stimulating hormone): Regulates primary skin color
Clear cytoplasm, in an ascidian zygote produces: Notochord and neural tube
In chordates the healing of fracture and repair of a skin wound are some other examples of: Regeneration
Important : Review all previous years’ 12 class past papers for comprehensive practice and better exam preparation.