Biology Questions

Q:

An irregular mode of reproduction resulting in the development of an embryo without fertilization is called

1.Parthenogenesis 2.Apogamy 3.Sporophytic budding

Select the correct answer using the code given below.

A) 1 only B) 2 only
C) 2 and 3 only D) 1, 2 and 3
 
Answer & Explanation Answer: D) 1, 2 and 3

Explanation:

In animals, parthenogenesis means development of an embryo from an unfertilized egg cell. In plants parthenogenesis is a component process of apomixis.Apogamy is a type of reproduction, occurring in some ferns, in which the sporophytedevelops from the gametophyte without fusion of gametes.Adventitious embryony also called sporophytic budding, is a type of apomixis in which an embryo develops directly from nucellus or integument tissue.So, all three are correct.

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Q:

What molecule carries genetic information?

A) RNA B) DNA
C) Proteins D) Nucleotides
 
Answer & Explanation Answer: B) DNA

Explanation:

The nucleus of a cell contains chromosomes, which carry genetic information in a long molecule called DNA.

Genes are regions of DNA that carry the code to control a particular cell activity or the production of a particular protein.

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Q:

Which of the following is a characteristic of the Ascomycota?

A) Sac formation B) Zygospore formation
C) Basidium formation D) All of the above
 
Answer & Explanation Answer: A) Sac formation

Explanation:

Ascomycota is a division or phylum of the kingdom Fungi that, together with the Basidiomycota, form the subkingdom Dikarya. Its members are commonly known as the sac fungi or ascomycetes. 

 

Hence, Sac formation is a characteristic of the Ascomycota fungi.

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Q:

The first formed primary xylem elements are called ___________.

A) Metaxylem B) Protoxylem
C) Xylem fibres D) Xylem parenchyma
 
Answer & Explanation Answer: B) Protoxylem

Explanation:
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Q:

In Paramecium, the food is moved to a specific spot by the movement of ______ which cover the entire surface of the cell.

A) cilia B) villi
C) pseudopodia D) vacuole
 
Answer & Explanation Answer: A) cilia

Explanation:
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Q:

Which part of the brain is responsible for consciousness?

A) Brain stem B) Cerebrum
C) Cerebellum D) None of the above
 
Answer & Explanation Answer: B) Cerebrum

Explanation:

The brain has three main parts the cerebrum, cerebellum and brainstem. As cerebrum is the largest part of the brain it is divided into two hemispheres i.e, right and left. It performs many functions like vision, hearing, touch, learning, consciousness, emotions, etc...

which_part_of_the_brain_is_responsible_for_consciousness1563518225.png image

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Q:

The DASH Diet plan was devised to prevent

A) TB B) Thyroid
C) Hypertension D) Diabetes
 
Answer & Explanation Answer: C) Hypertension

Explanation:

he DASH Diet plan was devised to prevent high blood pressure i.e, hypertension.

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Q:

A genus can best be defined as

A) a taxon composed of one or more species and a classification level lying below family B) a taxon composed of families
C) the most specific taxon D) a taxon comprised of classes
 
Answer & Explanation Answer: A) a taxon composed of one or more species and a classification level lying below family

Explanation:

A genus can best be defined as a taxon composed of one or more species and a classification level lying below family.

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