The structure which helps in the nutrition of the Embryo is – (1) Yolk sac (2) Amniotic membrane (3) Crypts (4) Placenta

The structure which helps in the nutrition of the Embryo is – (1) Yolk sac (2) Amniotic membrane (3) Crypts (4) Placenta
by

1 Answer

Answer :

(1) Yolk sac Explanation: The yolk sac is a membranous sac attached to an embryo, providing early nourishment. It functions as the developmental circulatory system of the human embryo, before internal circulation begins. It carries out transfer of nutrients in weeks 2 and 3 when the uteroplacental circulation is established
by
selected

Related questions

The structure which helps in the nutrition of the Embryo is (1) Yolk sac (2) Amniotic membrane (3) Crypts (4) Placenta

Description : The structure which helps in the nutrition of the Embryo is (1) Yolk sac (2) Amniotic membrane (3) Crypts (4) Placenta

Last Answer : Yolk sac 

Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus? (a) Yolk sac (b) Amnion (c) Chorion (d) Allantosis

Description : Which extraembryonic membrane in humans prevents desiccation of the embryo inside the uterus? (a) Yolk sac (b) Amnion (c) Chorion (d) Allantosis

Last Answer : (b) Amnion

Excretory products of mammalian embryo are eliminated out by - (1) Placenta (2) Amniotic fluid (3) Allantois (4) Ureter

Description : Excretory products of mammalian embryo are eliminated out by - (1) Placenta (2) Amniotic fluid (3) Allantois (4) Ureter

Last Answer : (1) Placenta Explanation: The placenta is an organ that connects the developing fetus to the uterine wall to allow nutrient uptake, waste elimination, and gas exchange via the mother's blood ... are also found in some snakes and lizards with yawing levels of development up to mammalian levels.

Excretory products of mammalian embryo are eliminated out by (1) Placenta (2) Amniotic fluid (3) Allantois (4) Ureter

Description : Excretory products of mammalian embryo are eliminated out by (1) Placenta (2) Amniotic fluid (3) Allantois (4) Ureter

Last Answer : Placenta

In which trimester does the following occur A sac called a placenta forms around the embryo and is connected to the embryo with an umbilical cord.?

Description : In which trimester does the following occur A sac called a placenta forms around the embryo and is connected to the embryo with an umbilical cord.?

Last Answer : What is the answer ?

Nutrition of embryo sac? -Biology

Description : Nutrition of embryo sac? -Biology

Last Answer : answer:

What does the filiform apparatus do at the entrance into ovule? (a) It brings about opening of the pollen tube. (b) It guides pollen tube from a synergid to egg. (c) It helps in the entry of pollen tube into a synergid. (d) It prevents entry of more than one pollen tube into the embryo sac

Description : What does the filiform apparatus do at the entrance into ovule? (a) It brings about opening of the pollen tube. (b) It guides pollen tube from a synergid to egg. (c) It helps in the entry of pollen tube into a synergid. (d) It prevents entry of more than one pollen tube into the embryo sac

Last Answer : (b) It guides pollen tube from a synergid to egg.

Fetal ejection reflex in human female is induced by (a) release of oxytocin from pituitary (b) fully developed fetus and placenta (c) differentiation of mammary glands (d) pressure exerted by amniotic fluid.

Description : Fetal ejection reflex in human female is induced by (a) release of oxytocin from pituitary (b) fully developed fetus and placenta (c) differentiation of mammary glands (d) pressure exerted by amniotic fluid.

Last Answer : (b) fully developed fetus and placenta

How does a surgeon operate on a fetus without damaging the amniotic sac ?

Description : How does a surgeon operate on a fetus without damaging the amniotic sac ?

Last Answer : The sac can reseal itself from a puncture. That’s why amniocentesis can be performed, because a needle is inserted into the sac and extracts a small amount of fluid, which is then analyzed for the baby’s chromosomes.

What structure attaches the embryo to the placenta?

Description : What structure attaches the embryo to the placenta?  

Last Answer : ANSWER: UMBILICAL CORD

Structure of the embryo sac? -Biology

Description : Structure of the embryo sac? -Biology

Last Answer : answer:

Structure of the embryo sac? -Biology

Description : Structure of the embryo sac? -Biology

Last Answer : answer:

Study of abnormalities by taken out the amniotic fluid of embryo is called :-

Description : Study of abnormalities by taken out the amniotic fluid of embryo is called :-

Last Answer : Study of abnormalities by taken out the amniotic fluid of embryo is called :- A. Endoscopy B. Amniocentesis C. Laproscopy D. Natal endoscopy

How does a reptile embryo in an amniotic shell get oxygen?

Description : How does a reptile embryo in an amniotic shell get oxygen?

Last Answer : THe shells of reptile eggs is porous - it absorbs oxygen throughthe membrane.

How is the yolk sac formed ?

Description : How is the yolk sac formed ?

Last Answer : What is the function of the yolk sac? The yolk sac is formed from the covering of the vitellus by some cells originated from the primitive gut. The yolk sac stores vitellus, the main nourishment source of nonplacental embryos. Image Diversity: yolk sac

Describe the post-zygotic events leading to implantation and placenta formation in humans. Mention any two functions of placenta. [All India 2010] or Explain the process of fertilisation in human female and trace the post-fertilisation events in a sequential order up to implantation of the embryo. [Foreign 2010] -Biology

Description : Describe the post-zygotic events leading to implantation and placenta formation in humans. Mention any two functions of placenta. [All India 2010] or Explain the process of fertilisation in human female ... events in a sequential order up to implantation of the embryo. [Foreign 2010] -Biology

Last Answer : Post-zygotic events leading to implantation and placenta formation. After implantation of blastocyst, the finger-like projections called chorionic villi, appear on the trophoblast and is surrounded by ... acts as an endocrine gland and secretes hormones like hPL, hCG, oestrogen and progesterone.

(i) When and how does placenta develop in human female? (ii)How is the placenta connected to the embryo? (iii)Placenta acts as an endocrine gland. Explain. -Biology

Description : (i) When and how does placenta develop in human female? (ii)How is the placenta connected to the embryo? (iii)Placenta acts as an endocrine gland. Explain. -Biology

Last Answer : (i)Development of placenta in human female After implantation of blastocyst, the finger-like projections called chorionic villi, appear on the trophoblast and is surrounded by uterine tissue and ... Chorionic Gonadotropin) (b) hPL (human Placental Lactogen) (c) Oestrogens (d) Progesteronem

Which one of the following is not the function of placenta? (a) Facilitates removal of carbon dioxide and waste material from embryo (b) Secretes oxytocin during parturition (c) Facilitates supply of oxygen and nutrients to embryo (d) Secretes estrogen

Description : Which one of the following is not the function of placenta? (a) Facilitates removal of carbon dioxide and waste material from embryo (b) Secretes oxytocin during parturition (c) Facilitates supply of oxygen and nutrients to embryo (d) Secretes estrogen

Last Answer : (b) Secretes oxytocin during parturition

The placenta in humans is derived from the: a) embryo only b) uterus only c) endometrium and embryo d) none of the above

Description : The placenta in humans is derived from the: a) embryo only b) uterus only c) endometrium and embryo d) none of the above

Last Answer : ANSWER: C -- ENDOMETRIUM AND EMBRYO 

What is embryo sac in plants? -Biology

Description : What is embryo sac in plants? -Biology

Last Answer : answer:

What is the function of embryo sac in plant? -Biology

Description : What is the function of embryo sac in plant? -Biology

Last Answer : answer:

what is the function of the polar nucleus in an embryo sac? -Biology

Description : what is the function of the polar nucleus in an embryo sac? -Biology

Last Answer : answer:

Why is the embryo sac called the female gametophyte? -Biology

Description : Why is the embryo sac called the female gametophyte? -Biology

Last Answer : answer:

Difference between ovule and embryo sac. -Biology

Description : Difference between ovule and embryo sac. -Biology

Last Answer : answer:

What is the egg cell in the embryo sac? -Biology

Description : What is the egg cell in the embryo sac? -Biology

Last Answer : answer:

Difference between ovule and embryo sac? -Biology

Description : Difference between ovule and embryo sac? -Biology

Last Answer : answer:

Difference between ovule and embryo sac. -Biology

Description : Difference between ovule and embryo sac. -Biology

Last Answer : answer:

What is the egg cell in the embryo sac? -Biology

Description : What is the egg cell in the embryo sac? -Biology

Last Answer : answer:

Difference between ovule and embryo sac? -Biology

Description : Difference between ovule and embryo sac? -Biology

Last Answer : answer:

Difference between ovary and embryo sac in flowers -Biology

Description : Difference between ovary and embryo sac in flowers -Biology

Last Answer : answer:

Mention the component cells of an embryo sac of angiosperms -Biology

Description : Mention the component cells of an embryo sac of angiosperms -Biology

Last Answer : answer:

Difference between ovary and embryo sac in flowers -Biology

Description : Difference between ovary and embryo sac in flowers -Biology

Last Answer : answer:

Mention the component cells of an embryo sac of angiosperms -Biology

Description : Mention the component cells of an embryo sac of angiosperms -Biology

Last Answer : answer:

In polygonum type of embryo sac, the cells are

Description : In polygonum type of embryo sac, the cells are

Last Answer : In polygonum type of embryo sac, the cells are A. Haploid B. Diploid C. Both A and B D. Poiyploid

The ovule in which embryo sac become horse shoe shaped in: (a) Amphitropous (b) Camphylotropous (c) Orthotropous (d) Anatropous Ans. (a) ......................................................---------------------------......................................................................... BOTANY PRACTICE TEST SAMPLE QUESTIONS 1. Caruncle develops-from: (a) Outer integument (b) Ctyledon (c) Funiculus (d) Inner integuments

Description : The ovule in which embryo sac become horse shoe shaped in: (a) Amphitropous (b) Camphylotropous (c) Orthotropous (d) Anatropous Ans. (a) .................................. ... TEST SAMPLE QUESTIONS 1. Caruncle develops-from: (a) Outer integument (b) Ctyledon (c) Funiculus (d) Inner integuments

Last Answer : Ans. ((a))

Embryo sac represents: (a) Megaspore (b) Megagamete (c) Megasporophyll (d) megagametophyte

Description : Embryo sac represents: (a) Megaspore (b) Megagamete (c) Megasporophyll (d) megagametophyte

Last Answer : Ans. ((d))

The nutritive tissue around the embryo in seed is a. Endosmosis b. Endodermis c. Endosperm d. Embryo-sac

Description : The nutritive tissue around the embryo in seed is a. Endosmosis b. Endodermis c. Endosperm d. Embryo-sac

Last Answer : Endosperm

.In a type of apomixis known as adventive embryony, embryos develop directly from the (a) nucellus or integuments (b) zygote (c) synergids or antipodals in an embryo sac (d) accessory embryo sacs in the ovule

Description : .In a type of apomixis known as adventive embryony, embryos develop directly from the (a) nucellus or integuments (b) zygote (c) synergids or antipodals in an embryo sac (d) accessory embryo sacs in the ovule

Last Answer : (a) nucellus or integuments

Embryo sac occurs in (a) embryo (b) axis part of embryo (c) ovule (d) endosperm.

Description : Embryo sac occurs in (a) embryo (b) axis part of embryo (c) ovule (d) endosperm.

Last Answer : (c) ovule

Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? (a) Ovules develop into embryo sac. (b) Ovary develops into fruit. (c) Zygote develops into embryo. (d) Central cell develops into endosperm

Description : Which one of the following statements regarding post-fertilisation development in flowering plants is incorrect? (a) Ovules develop into embryo sac. (b) Ovary develops into fruit. (c) Zygote develops into embryo. (d) Central cell develops into endosperm

Last Answer : (a) Ovules develop into embryo sac.

Through which cell of the embryo sac, does the pollen tube enter the embryo sac? (a) Egg cell (b) Persistant synergid (c) Degenerated synergids (d) Central cell

Description : Through which cell of the embryo sac, does the pollen tube enter the embryo sac? (a) Egg cell (b) Persistant synergid (c) Degenerated synergids (d) Central cell

Last Answer : c) Degenerated synergids

Female gametophyte of angiosperms is represented by (a) ovule (b) megaspore mother cell (c) embryo sac (d) nucellus.

Description : Female gametophyte of angiosperms is represented by (a) ovule (b) megaspore mother cell (c) embryo sac (d) nucellus.

Last Answer : (c) embryo sac

Point out the odd one. (a) Nucellus (b) Embryo sac (c) Micropyle (d) Pollen grain

Description : Point out the odd one. (a) Nucellus (b) Embryo sac (c) Micropyle (d) Pollen grain

Last Answer : (d) Pollen grain

Ovule is straight with funiculus, embryo sac, chalaza and micropyle lying on one straight line. It is (a) orthotropous (b) anatropous (c) campylotropous (d) amphitropous.

Description : Ovule is straight with funiculus, embryo sac, chalaza and micropyle lying on one straight line. It is (a) orthotropous (b) anatropous (c) campylotropous (d) amphitropous.

Last Answer : a) orthotropous

Embryo sac represents (a) megaspore (b) megagametophyte (c) megasporophyll (d) megagamete.

Description : Embryo sac represents (a) megaspore (b) megagametophyte (c) megasporophyll (d) megagamete.

Last Answer : b) megagametophyte

Eight nucleated embryo sac is (a) only monosporic (b) only bisporic (c) only tetrasporic (d) any of these.

Description : Eight nucleated embryo sac is (a) only monosporic (b) only bisporic (c) only tetrasporic (d) any of these.

Last Answer : (d) any of these.

An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is (a) hemitropous (b) campylotropous (c) anatropous (d) orthotropous.

Description : An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is (a) hemitropous (b) campylotropous (c) anatropous (d) orthotropous.

Last Answer : (a) hemitropous

Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other? (a) Amphitropous (b) Circinotropous (c) Atropous (d) Anatropous

Description : Which one of the following represents an ovule, where the embryo sac becomes horse-shoe shaped and the funiculus and micropyle are close to each other? (a) Amphitropous (b) Circinotropous (c) Atropous (d) Anatropous

Last Answer : (a) Amphitropous

The arrangement of the nuclei in a normal embryo sac in the dicot plants is (a) 3 + 3 + 2 (b) 2 + 4 + 2 (c) 3 + 2 + 3 (d) 2 + 3 + 3.

Description : The arrangement of the nuclei in a normal embryo sac in the dicot plants is (a) 3 + 3 + 2 (b) 2 + 4 + 2 (c) 3 + 2 + 3 (d) 2 + 3 + 3.

Last Answer : (c) 3 + 2 + 3

In angiosperms, functional megaspore develops into (a) embryo sac (b) ovule (c) endosperm (d) pollen sac.

Description : In angiosperms, functional megaspore develops into (a) embryo sac (b) ovule (c) endosperm (d) pollen sac.

Last Answer : a) embryo sac