75607 + Interview Questions in Secondary School in Science

1.	What is the Signs of phormacobies and write a short note IP
Answer» Answer: It’s that old riddle that’s sparked many arguments through the ages: was it the chicken or the egg that came first? It’s such a tricky question because you need a chicken to lay an egg, but chickens come from eggs, leaving us with an intractable circle of clucky, feathery life that apparently has no CLEAR starting point. Thankfully, there’s no need to keep brooding over this forever. This is a riddle we can unscramble with the tools of science—more specifically, the principles of evolutionary biology. Let’s get cracking. The first eggs Eggs are found throughout the animal kingdom. Technically speaking, an egg is simply the membrane-bound vessel inside which an embryo can grow and develop until it can survive on its own. Scientific illustration of a RANGE of different eggsEggs of all shapes and sizes exist throughout the animal kingdom. Image adapted from: Adolphe Millot; CC0 But let’s focus on the type of bird's egg we recognise today. These first came on the scene with the evolution of the first amniotes many millions of years ago. Prior to their arrival, most animals relied on water for REPRODUCTION, laying their eggs in ponds and other moist environments so that the eggs didn’t dry out. At some point, a different kind of egg began to evolve, which had three extra membranes inside: the chorion, amnion and allantois. Each membrane has a slightly different function but the addition of all these extra layers provided a conveniently enclosed, all-in-one life support system: an embryo can take in stored nutrients, store excess waste products and respire (breathe) without the need of an external aquatic environment. The extra fluids encased in the amnion, plus the tough outer SHELL, provide extra protection too. Diagram of a chicken egg in its 9th dayDiagram of a chicken egg in its 9th day—an example of an amniotic egg. Image adapted from: K.D. Schroeder; CC-BY-SA 3.0 Amniotic eggs were a big deal. They opened up a whole new world of opportunities for land-based egg-laying locations, and the extra membranes paved the way for bigger (and mostly better) eggs. We’re still not sure of exactly when this happened, largely because eggy membranes don’t make very good fossils, leaving scientists with no clear record of when, or how, amniotic eggs developed. Our best guess is that the last common ancestor of both tetrapods (four-limbed animals with a backbone) and the amniotes (four-limbed animals with a backbone that lay eggs with all those extra layers) lived around 370-340 million years ago, though some sources put the first amniote species as living closer to 312 million years ago. Today’s mammals, reptiles and birds are all descendants of the first amniotes. (This leaves us with ANOTHER eggsellent question: which came first, the amniote or the amniotic egg? But let’s just stick with chickens for now.)

1.

What is the Signs of phormacobies and write a short note IP

Answer»

Answer:

It’s that old riddle that’s sparked many arguments through the ages: was it the chicken or the egg that came first? It’s such a tricky question because you need a chicken to lay an egg, but chickens come from eggs, leaving us with an intractable circle of clucky, feathery life that apparently has no CLEAR starting point.

Thankfully, there’s no need to keep brooding over this forever. This is a riddle we can unscramble with the tools of science—more specifically, the principles of evolutionary biology.

Let’s get cracking.

The first eggs

Eggs are found throughout the animal kingdom. Technically speaking, an egg is simply the membrane-bound vessel inside which an embryo can grow and develop until it can survive on its own.

Scientific illustration of a RANGE of different eggsEggs of all shapes and sizes exist throughout the animal kingdom. Image adapted from: Adolphe Millot; CC0

But let’s focus on the type of bird's egg we recognise today. These first came on the scene with the evolution of the first amniotes many millions of years ago. Prior to their arrival, most animals relied on water for REPRODUCTION, laying their eggs in ponds and other moist environments so that the eggs didn’t dry out.

At some point, a different kind of egg began to evolve, which had three extra membranes inside: the chorion, amnion and allantois. Each membrane has a slightly different function but the addition of all these extra layers provided a conveniently enclosed, all-in-one life support system: an embryo can take in stored nutrients, store excess waste products and respire (breathe) without the need of an external aquatic environment. The extra fluids encased in the amnion, plus the tough outer SHELL, provide extra protection too.

Diagram of a chicken egg in its 9th dayDiagram of a chicken egg in its 9th day—an example of an amniotic egg. Image adapted from: K.D. Schroeder; CC-BY-SA 3.0

Amniotic eggs were a big deal. They opened up a whole new world of opportunities for land-based egg-laying locations, and the extra membranes paved the way for bigger (and mostly better) eggs.

We’re still not sure of exactly when this happened, largely because eggy membranes don’t make very good fossils, leaving scientists with no clear record of when, or how, amniotic eggs developed. Our best guess is that the last common ancestor of both tetrapods (four-limbed animals with a backbone) and the amniotes (four-limbed animals with a backbone that lay eggs with all those extra layers) lived around 370-340 million years ago, though some sources put the first amniote species as living closer to 312 million years ago. Today’s mammals, reptiles and birds are all descendants of the first amniotes.

(This leaves us with ANOTHER eggsellent question: which came first, the amniote or the amniotic egg? But let’s just stick with chickens for now.)

3.	1) what is emulsification ?2) what is the benefit of residual volume of air in the respiratory process ?
Answer» EMULSIFICATION is defined as a process of dispersing one liquid (CONTAINING the bioactive compounds) in a second immiscible liquid, by applying electrostatic, or HYDROPHOBIC, or hydrogen BONDING interactions between the bioactive compounds and an encapsulating material [16].

40.	●) If we store food items after drying them in the sun they last for months and year. Why ?Please give small answer
Answer» Yes, the humidity of the FOOD item lost due to sun light and the food item REMAIN for MANY DAYS

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What is the Signs of phormacobies and write a short note IP

What is time ? explain it's definition

1) what is emulsification ?2) what is the benefit of residual volume of air in the respiratory process ?

Why do animals respond more quickly than plants ?

Ghsgafahhrzbfafjdnathsgnzgjx kg afhzfs

What is the Sigoisicnce of phormacobies and write a short note IP

Application of pressure G.O

Expalin the human ear

Which is better fuel lpg or coal? why. give answer in 5 points

there is a mistake in each of the following ray diagram in figure (a),(b)and(c) given below. observe them carefully and redraw the diagram With corrections.

ਰਿਪਰੋਕਤ ਰਸਾਇਦ ਉਦਾਹਰਾ ਹੋ

Different between arteries and veins

Mention three major application which use heating effect and its suitable example

Section-AWhat are the two observations that you observe when Zinc metal is added to Copper sulphate,

What is cell???last question and bye bye everyone.

Application of pressure Go O

What do you mean by novel-dreg delivery system?

(d) pollen grains.4. What are the advantages of sexual reproduction over asexual reproduction?5. What are the functions performed by the testis in human beings?

Draw the electron alot structure of ethane ( c2 H6 ).

for the same angle of incidence in media elcome M and n the angles of refraction are 40 degree 35 degree and 15 degree respectively in which medium will the velocity of the light be minimum give reason for your answer

It protects the body against infections by destroying germs.True or False

J. Multiple Choice Questions.1. The message travels along a nerve fibre inthe form of(a) Stimulus(b) Response(C) Impulse(d) Reflex

Fill in the blanks!!1. The flower ____________by wind are small and light

3. Why the valley is called silent?4. What is sacrifice?5. What is responsibility?

Define pd and it's S. I unit

Explain Ruther ford gold foil experimentwith diagram.

●) If we store food items after drying them in the sun they last for months and year. Why ?Please give small answer

What is solar energy ? what are the purpose of solar energy?

That conrols the focal length of the eye lens _

What is neutron?????

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That can become superconductors at normal temperatures. Find out the maximum temperatuachieved so far for a superconductor to workor tasks see Page 231