The mesodermal cells do not invaginate but migrate medially and caudally

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

Neural plates is formed from

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

The unspecialized cells present in flatworms and planaria are:

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

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

Intercalary meristems are situated at: (Bwp 2015)

The three germinal layers formed during

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

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

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

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

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

An embryo having segmentation cavity is known as:

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

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

Which one regenerates pincer claw

Grey equatorial cytoplasm gives rise to

Spemann performed his experiments on which of following

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

Acetabularian has irregular shaped cap:

Apical meristems are responsible for:

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

Blastomere are formed during: (Fsd 13)

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

During development coelom is formed by

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

Which of the following light favours elongation of cells:

The discoidal cap of cells above the blastocoel

Mainly nervous system is formed from

Which one regenerates its arm?

The chick embryo completes its development in

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

The unspecialized cells present in flatworms and planaria are:

it gives rise to muscle cells:

Cambuim is a example of

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

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

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

Nucleus in Acetabularia is:

Poor vision dryness, loss of hair pigment is signs of

Which one of these produces larval epidermis:

Which one of the following is not a growth region

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

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

Lateral meristems include:

The hypoblast is mainly presumptive: (Rwp 2013)

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

Coelom is farmed between

The ectoderm develops into the:

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

Anterior part of neural tube gives rise to:

The cavity formed between somatic and splanchnic mesoderm is:

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

Gray vegetal cytoplasm gives rise to:

Mosulla is characterized by

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

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

Neurula is the stage in which embryo has:

The shell of chick egg is secreted as egg passes through

Cleft palate In human being is also called

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

Grey vegetal cytoplasm gives rise to

Movement and rearrangement of the cells in the embryo is called

In Klinefelter's syndrome the sex chromosomes are

Which one is not related with neurulation?

Yellow cytoplasm gives rise to (Mirpur Kashmir 2015)

Great power of regeneration is met within

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

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

Acetabularia is an/a

Root primordial develop from the root cambium called:

They are situated at bases of internodes in many plants:

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

Study of aging is called: (Swl 2015)

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

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

The plant hormone that inhibit the growth of lateral shoots:

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

Adetnbularia is an:

Chromosomal syndromes lead to

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

In plants ,having ability to divide are known as:

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

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

Harelip condition is also called

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

Gastrulation involves

The specific regions of plant where growth occurs are called:

The ectoderm & mesoderm are formed from

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

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

Secondary growth refers to increase in:

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

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

Clear cytoplasm produces

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

Active shoot apes controls development of:

it gives rise to muscle cells

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

The hypoblast of chick embryo is presumptive

Cleavage results in a structure called

Presumptive neural ectoderm is present on which surface of gastrulla

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

Apical dominance is caused due to

Acetabularia consists of a base, a stalk and a

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

Which one of the following shows poor regeneration

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

Earthwarm can regenerate its

The growth pattern in plants is of

Environmental factors causing or contributing to abnormal development are called

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

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

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

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

The growth rate is influenced by

Primary growth in plants is caused by (Sgd 2016)

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

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

Klinefelters syndrome is an example of

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

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

Who did perform experiments on Acetabularia?

The negative physiological changes in our body are called