Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Active Tutors
Asked Questions
Answered Questions
mechanism of cleavage such as the mitotic division in any cell cleavage is the result of two events mitotic nuclear division karyokinesis followed
structure of blastulathe structure of blastula turns into modified in several animal groups the changes are related to the amount of yolk deposited
products of cleavage morula and blastula in several cases the blastomeres in early cleaving stages tend to presume spherical shape like that of the
meroblastic or partial cleavagethe egg does not divide totally because divisions are restricted to only a part of the egg where as the rest of the
bilateral cleavagein some animals for example tunicates and nematodes although in different way the arrangement of 4 blastomeres after second
types of cleavagea radial type if each of the blastomeres of upper tier lies exactly over the corresponding blastomeres of the lower tier the pattern
patters of cleavage in most of the animal groups with spherical or almost spherical egg and little or moderate amount of yolk micro-or mesolecithal
basic planes of cleavage the basic planes along which the egg and its daughter blastomeres are divided during early cleavage area meridional plane -
planes of cleavage the ova of most of the animal groups except some specific cases like insects are spherical or nearly spherical having their own
principles governing cleavage a the nucleus and mitotic achromatic figure tend to occupy the centre of active cytoplasmic density of the dividing
influence of yolk on cleavage though biological significance of yolk is to provide nourishment to the developing embryo it is not part of the active
peculiarities of mitosis - cleavagefrom the following you will learn that the mitosis in the phase of cleavage has some striking peculiaritiesa
cleavage - development biologycleavage or segmentation is a series of cell divisions of the fertilized egg through which it is converted into a
cleavage and gastrulationeventually one spermatozoon fuses with the ovum to r restore the diploid genomic condition and activates all the potentials
fusion of egg and sperm pro-nuclei the fusion of the sperm and egg which is the beginning of the fertilization process is completed with the fusion
events after sperm and egg fusion the entry of the sperm into the egg activates the egg the activation of egg results in two types of responses1 the
events prior to the sperm-egg fusion in a number of organisms that have been studied the sperm remain immotile in the testis or in the semen the
fertilization - development biologypreviously you knew the process which leads to the differentiation of the male and female germ cells the sperm and
secondary egg envelopes these are secreted by oviducts and other accessory parts of genital organs while the egg is passing through them from ovary
primary egg envelopes these are the egg envelopes which develop in the ovary between oocyte and follicle cells in the space occupied by the
egg envelopes like any other cell all the eggs are covered by the cell membrane or plasmalemma it is with two layers of about 50 a unit membrane
cell cycle urgent question please biology expert it3939s for an exam when m-cdk gets attached to cyclin it doesn3939t just get activated
external auditors reports the audit report is the final stage in the process of an audit the terms true and fair present fairly have special
compilations- non-assurance engagementswithin a compilation engagement such the accountant is engaged to need accounting expertise that opposed to
agreed-upon procedures - non-assurance engagementswithin an engagement to present agreed-upon procedures the auditor is engaged to carry out those