Neurula is the stage in which embryo has:

Harelip condition is also called

Environmental factors causing or contributing to abnormal development are called

This stage is characterized by the movement and rearrangement of cel's in the embryo:

Who did perform experiments on Acetabularia?

The syndrome which is an example of the sex chromosome is:

Hans Driesch performed his experiment on embryology with the eggs of;

Adetnbularia is an:

The growth rate is influenced by

Grey equatorial cytoplasm gives rise to: (Fsd 2016, Mir Kashmir 2016)

Spemann performed his experiments on which of following

The meristems present at the base of inter nodes are called:

The occurrence of all the following stages during developmental process is true Except:

Acetabularia consists of a base, a stalk and a

Active shoot apes controls development of:

The plant hormone that inhibit the growth of lateral shoots:

In the zone of elongation, the volume of the cells increases up to

The unspecialized cells present in flatworms and planaria are:

Degeneration & disappearance of drastic. tissue in of blood vessels results in arteriosclerosis

During elongation the cell volume increases up to: (Grw 2015)

In which developmental stage, germs layers are formed (Rwp 2015)

Which one is not related with neurulation?

Which one of the following sex chromosomal abnormalities leads to tallness, aggressiveness and antisocial behaviour?(D.G.Khan 2015 Group I)

The negative physiological changes in our body are called

The shell of chick egg is secreted as egg passes through

An embryo having segmentation cavity is known as:

Which of the following light favours elongation of cells:

Secondary growth leads to an increase in the diameter (thickness) of the

Movement and rearrangement of the cells in the embryo is called

Grey vegetal cytoplasm gives rise to

Coelom is farmed between

The ectoderm & mesoderm are formed from

Grey equatorial cytoplasm gives rise to

Gray vegetal cytoplasm gives rise to:

In incubating eggs artificially, the incubators are usually regulated at temperature between:

The programmed series of stages from a simpler to a more complex form constitutes the process of:

The pigment free area that appears at the time of fertilization is called:

Secondary growth refers to increase in:

Apical dominance is caused due to

Meristems are young tissues or group of cells that retain the potential to

The cavity formed between somatic and splanchnic mesoderm is:

Optimum temperature for growth of plants is: (Fsd 2015, Lhr 2014 G I)

it gives rise to muscle cells

Acetabularia is an/a

Which one of the following shows poor regeneration

Which one regenerates pincer claw

The removal of apex releases the lateral buds from the apical dominance. It is called:

In 18 hour old chick embryo, one of prominent structural features is

Environmental factors causing abnormal development are grouped together as (Swl 2016)

The capacity of some cells to evoke a specific developmental response in others

Great power of regeneration is met within

The hypoblast is mainly presumptive: (Rwp 2013)

In vascular plants, growth occurs through the activity of the;

Which one of the following is not a growth region

Apical meristems are responsible for:

For maximum growth, the optimum temperature is 25-30 CENTIGRADE & it is least at

The mesodermal cells of the chick embryo migrate medially, caudally from both sides and create a midline thickening called;

During the maturation phase of growth the cells which elongate lengthwise are

The mesodermal cells do not invaginate but migrate medially and caudally from both sides and create a midline thickening called:

It is the condition that leads to tallness, aggressiveness mental defect and anti-social behaviour

The hypoblast of chick embryo is presumptive

Yellow cytoplasm gives rise to (Mirpur Kashmir 2015)

The process through which one group of cells influences the way in which another group of cell becomes differentiated is

It is characterized by the presence of a space called blastocoele:

Acetabularian has irregular shaped cap:

Klinefelters syndrome is an example of

Which one regenerates its arm?

Earthwarm can regenerate its

A embryo consisting of closely packed rounded mass of blastomeres is known as:

Chromosomal syndromes lead to

Blastomere are formed during: (Fsd 13)

Special mesodermal cells lying between the somatic and side plate mesoderm of embryo of frog, which eventuallygive rise to urinary system are:

The branch of biology dealing with the study of development of a zygote till it is hatched or borne is called:

Which one of these produces larval epidermis:

The ability to regain or recover lost or injured part of the body is called

Conversion of a haploid cell into a diploid cell occurs during in most animals

The study of human populations and things that affect them is called:

Gastrulation involves

Study of aging is called: (Swl 2015)

Which light enhance cell division and retard cell enlargement:(Lhr 2014 G II)

Root primordial develop from the root cambium called:

Presumptive neural ectoderm is present on which surface of gastrulla

Intercalary meristems are situated at: (Bwp 2015)

Primary growth in plants is caused by (Sgd 2016)

The ectoderm develops into the:

In flatworms and planaria, the unspecialized cells are always present in the body of adult.

The process of converts the single-called zygote structure in most animal embryos

Yellow cytoplasm of ascidian zygote gives rise to: (Lhr 2013

At the cephalic end of primitive streak, closely packed cells form local thickening known as

Poor vision dryness, loss of hair pigment is signs of

During development coelom is formed by

In Klinefelter's syndrome the sex chromosomes are

The three germinal layers formed during

The mesodermal cells do not invaginate but migrate medially and caudally

They are situated at bases of internodes in many plants:

Work an embryonic induction was done by Spemann and Mangold in:

At the cephalic end of primitive streak,closely packed cells form a local thickening known as:

Immediately after fertilization, the egg undergoes a series of mitotic divisions called:

The chick embryo completes its development in

In plants ,having ability to divide are known as:

The growth pattern in plants is of

The meristem present at the apices of roots and shoots are knoWn as:

It is an ordered sequence of irreversible steps, with each step setting up the necessary conditions for the next step:

The branch of biology which dealt with abnormal development and its causes its termed as

Clear cytoplasm produces

Mosulla is characterized by

The pigment free area that appears at the time of fertilization is called

The internal factors which influence the growth rate in plants are the hormones, water and

The unspecialized cells present in flatworms and planaria are:

The specific regions of plant where growth occurs are called:

The discoidal cap of cells above the blastocoel

Anterior part of neural tube gives rise to:

Mainly nervous system is formed from

Cambuim is a example of

Lateral meristems include:

The abnormal development of a small skull is the condition known as

it gives rise to muscle cells:

Nucleus in Acetabularia is:

Branch of biology which deals with the study of abnormal development and their causes is called: (Bwp 2016)

Turner's syndrome is the condition in which one X chromosome is

Cleavage results in a structure called

Cleft palate In human being is also called

An embryo having neural plate of tube is said to be?

Neural plates is formed from

The peripheral part of the blastoderm of chick embryo where the cells lie unseperated from the yolk is:

Immediately after fertilization, the egg undergoes a series of mitotic division called: