The early response for the entry of sperm into the egg is prevention of ………………. .
See Answer →nhibitor of microfilament formation such as ……………… prevents the formation of fertilization cone.
See Answer →………………. is the extension of egg cytoplasm around the entering sperm head
See Answer →Chose the correct answer form alternatives provided.
a) Fertilization is responsible for the activation/arrest of development.
b) Activation of the sperm ensures/does not ensure that sperm will meet the egg.
c) In organisms with external/internal fertilization, chemotactic mechanisms have been evolved to attract the sperm towards the egg.
d) A period of maturation in the female reproductive tract required for the transformation of sperm is known as activation/capactiation.
e) Sperm using an enzyme called acrosin/hyaluronidase penetrate their way through zona pellucida.
See Answer →How is EMT used in the embryo and in the adult?
See Answer →What is the difference between juxtacrine and paracrine signalling?
See Answer →How would you define a ligand in cell-to cell signalling
See Answer →Explain the role of fate maps and patterns of development
See Answer →Progesterone
See Answer →Testosterone
See Answer →Aldosterone
See Answer →Parathormone
See Answer →Adrenocoricotropic hormone
See Answer →Describe specialised sensory organs of vertebrates and relate their role to their habita
See Answer →List the cranial nerves of special senses and the nerves that innervate the eye muscles
See Answer →List the primary divisions of the nervous system and their subdivisions.
See Answer →Fill in the blanks:
i) The four types of mammalian uteri are ………………….., ………………………., …………….. and ……………………. .
ii) The muscle layer of the uterus is called ………………………….
iii) The sequence of organs of mammalian female genital system are: two ovaries …………..……… …………..…… ……………… …………….. .
iv) In female birds only the …………………… gonad develops into the
See Answer →Choose the correct alternative:
i) The visceral skeleton is also referred to as (chondrocranium/ splanchocranium).
ii) Jaws arose from the (mandibular/hyoid) arch.
iii) The upper jaw is made up of the (palatoquadrate/Meckel’s cartilage).
iv) Branchial basket formed of the visceral arches is found in (teleosts/cyclostomes).
v) If the jaw is attached to the skull and not suspended by the hyomandibula, the suspensorium is (autodiastylic/autostylic)
See Answer →What are the different types of feathers? What are their functions?
See Answer →Which muscle is attached to the hair follicle of human beings and make hair stand erect?
See Answer →