SSC (Marathi Semi-English) 10th Standard Board Exam [इयत्ता १० वी] - Maharashtra State Board Question Bank Solutions for Science and Technology 2

Give an example of disaster due to unawareness.

Nuclear membrane disappears completely in the phase called ______ of karyokinesis.

What do you understand by homologous chromosomes?

Explain the following concept in short:

Acrocentric chromosome

Give a scientific reason.

Why it is essential to get training of first aid?

I am the V shaped chromosome with central centromere and equal chromatid arms. What is my name?

Give scientific reason.

Cell division is one of the important properties of cells and organisms.

Give scientific reasons.

Cell division is one of the important properties of cells and organisms.

Ethanoic acid has a .................... odour.
(a) Rotten eggs
(b) Pungent
(c) Vinegar-like
(d) Mild

The molecular formula of acetic acid is _________ .
(a) CH₃COOH
(b) CH₃ – CH₃
(c) C₆H₆
(d) C₂H₄

Choose the correct alternative and rewrite the following: 

Acetic acid ..................

When zinc powder is added to acetic acid ______________

(a) the mixture becomes warm
(b) a gas is evolved
(c) the colour of the mixture becomes yellow
(d) a solid settles at the bottom

Genetic recombination occurs in ______ phase of prophase of meiosis-I.

Fill in the blank and explain the statement.

All chromosomes are arranged parallel to equatorial plane of cell in ______ phase of mitosis.

Fill in the blank and explain the statement.

For formation of plasma membrane, ____________ molecules are necessary.

With the help of suitable diagrams, explain the five stages of prophase-I of meiosis.

Write short note

Biodiversity.

How the biodiversity can be conserved?

Answer the following.

Write the names of biodiversity hot spots.

Answer the following.

Which are the reasons for endangering the many species of plants and animals? How can we save those?