Tag: evs

Questions Related to evs

What is acrosomal reaction?

evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Contact of sperms with egg

  2. Digestion of zona pellucida

  3. Disintegration of acrosome

  4. Contact of acrosome and nucleus of egg

Show answer
Correct Option: B

Our stomach is located 

evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. In the head

  2. In the left side of the body

  3. In the right side of the body

  4. Below the abdomen

Show answer
Correct Option: B
Explanation:
  • The stomach is a muscular organ located on the left side of the upper abdomen. 
  • The stomach receives food from the oesophagus.
  •  As food reaches the end of the oesophagus, it enters the stomach through a muscular valve called the lower oesophagal sphincter.
  •  The stomach secretes acid and enzymes that digest food. Hence, our stomach is located on the left side of the body.
So, the correct answer is 'on the left side of the body'.

In which animal both intracellular and intercellular digestion occurs

evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Hydra

  2. Earthworm

  3. Nematode

  4. Paramecium

Show answer
Correct Option: A

Choose the correct answer from the allternatives given.
Which part of the digestive system secretes peritrophic membrane around the food in cockroach?

evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Crop

  2. Gizzard

  3. Hepatic caecae

  4. Mesenteron

Show answer
Correct Option: C
Explanation:

Answer C: Hepatic Caecae

The digestive juices flow into the stomach owing to the caecae secretion. The midgut is lined by a peritrophic membrane and not by a cuticle or cuticle.

Find out phenotypic categories in following cross :
A - AaBbCC $\times$ aa BBCc
B - Gg Rr Tt $\times$ gg rr TT
C - aabbCC $\times$ AA BB cc

evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. (A) 2 (B) 4 (C) 1

  2. (A) 2 (B) 2 (C) 2

  3. (A) 2 (B) 3 (C) 1

  4. (A) 3 (B) 2 (C) 2

Show answer
Correct Option: A
Explanation:

The phenotype of an organism is the composite of the organisms observable characters, A has 2 observable characters, B shows 4 characters, while C shows 3.

So, the correct option is '(A) 2 (B) 4 (C) 1'.

Choose the correct answers from the alternatives given.
The archenteron develops into

evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. blastocoel

  2. endoderm

  3. lumen of the digestive tract

  4. placenta

Show answer
Correct Option: C
Explanation:

Archenteron is the primary cavity which is formed at the initial stage of gastrulation. This cavity begins at the dorsal lip of blastopore which is at the one side of the dividing zygote and then this cavity moves through the zygote to the other side which gives rise to the anus. 

So the correct option is 'lumen of digestive tract

How many of the enzymes given below in block belong to brush border enzymes?
Multase, Nucleosidase, Enterokinase, Amylopsin, Steapsin, Nucleases, Erepsin, Carboxypeptidase, Lactase, Aminopeptidase

evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. Six

  2. Seven

  3. Five

  4. Four

Show answer
Correct Option: D
Explanation:

The brush borders of the intestinal lining are the site of terminal carbohydrate digestions. The microvilli that constitute the brush border have enzymes for this final part of digestion anchored into their apical plasma membrane as integral membrane proteins. Maltase, lactase, erepsin, nucleosidase are the brush border enzymes.

So, the correct option is 'four'.

Citrate undergoes dehydration to form unstable compound

evs food trends types of ecological pyramids the muscular system and digestive system in human beings introduction to human digestive system

  1. iso-citrate

  2. succinate

  3. cis-aconitate

  4. aconitate

Show answer
Correct Option: A
Explanation:

In step two, an enzyme called aconitase converts citrate into isocitrate. Next, an isocitrate dehydrogenase enzyme oxidizes isocitrate, a six-carbon molecule, to a five-carbon α-ketoglutarate. The carbon that was lost is released as carbon dioxide and one NADH is also formed.

So, the correct option is, 'Isocitrate'.

Why is vivipary an undesirable character for annual crop plants?

evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

  1. It reduces vigour of the plant

  2. It adversely affects the fertility of the plant

  3. The seeds exhibit long dormancy

  4. The seeds connot be stored under normal conditions for next season

Show answer
Correct Option: A

Which of the following is true for Cash crop farming?

evs economic importance of plants and animals manure manures and fertilisers role of organic manures in soil management

  1. Cash crop farming is for profit

  2. Monocropping or sole cropping, which is the growing of a single crop on a piece of land, is

    common with cash crop

  3. It is called commercial farming

  4. All of the above

Show answer
Correct Option: D
Explanation:

Explanation: A cash crop is an agricultural crop which is grown for sale to return a profit. It is typically purchased by parties separate from a farm. The term cash crop is applied exclusively to the agricultural production of plants; animal agriculture is not a part of the terminology.