Tag: biology

Questions Related to biology

Identify the correct sequence of movement of water in the root of higher plants.

biology transportation in plants and circulation in animals mineral transport types of transport translocation of organic solutes

  1. Epidermic - Cortex -Pericycle-endodermis - phloem

  2. Epidermis -Cortex-endodermis -pericycle -phloem

  3. Epidermis -Cortex -pericycle-endodermis -xylem

  4. Epidermis -Cortex-endodermis-pericycle -xylem

Show answer
Correct Option: A
Explanation:
Water will take the path of least resistance through root to reach the xylem. Water can move across the root via three different pathways. Once in the endodermal cells, the water freely enters the xylem cells where it joins the fast-moving column of water or transpiration stream, headed to the leaves.
So the correct option is 'Epidemic - Cortex -Pericycle-endodermis - phloem'.

Root pressure is generally not found in 

biology transportation in plants and circulation in animals mineral transport types of transport translocation of organic solutes

  1. Wheat plant

  2. Colocasia

  3. Pinus

  4. All of these

Show answer
Correct Option: A

Force responsible for exudation of liquid drops from the margin of the leaves is

biology transportation in plants and circulation in animals mineral transport types of transport translocation of organic solutes

  1. Negative hydrostatic

  2. Transpiration pull

  3. Imbibition

  4. Positive pressure

Show answer
Correct Option: D
Explanation:

  • Negative hydrostatic pressure develops at the time of water loss, it occurs when the water is lost through transpiration and creates tension in the cell.
  • Transpiration is the process in which water is lost through the upper or aerial plant parts in the form of water. 
  • Imbibition is the swelling of cells that occurs due to the absorption of water. 
  • Positive pressure is the force in the xylem which exudates drops of liquids through the stoma to the outside and also requires hydathodes which help in the process of guttation (exudation of water droplets mostly from the leaves margins). 
So, the correct option is 'Positive pressure'.

Refers to the items listed under different groups in the given table and select the option which correctly indentifies $X$ and $Y$.

Group I Group II
TapewormHookwormLiver fluke      X VultureHyena   YJackal
biology animal tissues, morphology and anatomy of cockroach specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. X - Pinworm, Y - Crow

  2. X - Mosquito, Y - Bison

  3. X - Leech, Y - Koala

  4. X - Bed bug, Y - Wildbeest

Show answer
Correct Option: A
Explanation:

Group 1 represents various members of the Phylum Platyhelminthes while Group 2 includes members of class Aves of vertebrata.

Pinworm and Crow are included in Phylum Platyhelminthes and Aves respectively.
So, the correct option is 'X - Pinworm, Y - Crow'.

Ubisch bodies are connected with the formation of?

biology animal tissues, morphology and anatomy of cockroach specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. Sporopollenin

  2. Intine and pollenkitt

  3. Exine

  4. Pollenkit and pollinia

Show answer
Correct Option: C
Explanation:
When the anther is young, at the stage of sporogenous tissue, the cells of the tapetum contain numerous spherical bodies called pro-ubisch bodies. The number of pro-ubisch bodies increases by meiosis in Pollen mother cells. These pro-ubisch bodies get coated by sporopollenin and are called ubisch bodies or orbicules. These are involved in the formation of exine of the pollen grains. Thus, the correct answer is option C, Exine.

Unlike animals, plants get energy in the form of

biology animal tissues, morphology and anatomy of cockroach specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. ATP

  2. Soil

  3. Roots

  4. Water

Show answer
Correct Option: A
Explanation:

Chloroplasts contain a pigment called chlorophyll. Chlorophyll is able to capture the energy from the sun. In doing this, a series of chemical reactions occur that convert the sun's energy into ATP (energy for the plant). 

Therefore, the correct answer is option A.

How many different types of tissues are found in human body?

biology animal tissues, morphology and anatomy of cockroach specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. $4$

  2. $14$

  3. $12$

  4. $40$

Show answer
Correct Option: A
Explanation:

There are four types tissues found in human body namely the muscular, epithelial, connective and nervous.

Population of ferocious Red Ant is kept under check by _______________.

biology animal tissues, morphology and anatomy of cockroach specialized cells in animals tissues and types of tissues levels of organisation in animals

  1. Rufus Wood Pecker

  2. Red-billed Ox Pecker

  3. Yellow-billed Ox-Pecker

  4. Sparrow

Show answer
Correct Option: A

Human dental formula of adult is:

biology digestive system of human buccal cavity digestive system - organs coordination in the process of digestion

  1. $\dfrac{2123}{2123}$

  2. $\dfrac{2123}{1223}$

  3. $\dfrac{1223}{2123}$

  4. $\dfrac{1223}{1223}$

Show answer
Correct Option: A

Elephant tusks are upper incisors, whereas walrus tusks are

biology digestive system of human buccal cavity digestive system - organs coordination in the process of digestion

  1. Upper incisors

  2. Lower incisors

  3. Upper canines

  4. Lower canines

Show answer
Correct Option: C
Explanation:

Walrus tusk ivory comes from two modified upper canines. It is also known as 'morse'. Walrus teeth are also commercially carved and traded. The average walrus tooth has a rounded, irregular peg shape and is approximately 5 cm in length.