Practice paper · Annual

When an anther is young , a group of compactly arranged homogenous cell called as

1. ATapetum
2. BEpidermis
3. CMiddle layer
4. DSporogenous tissue

Below are a few statements with reference to placenta .

1. i)
   It act as an endocrine tissue
2. ii)
   It Facilitate the supply of oxygen and nutrient only
3. iii)
   It is connected by embryo with an umbilical cord Iv) In later pregnancy relaxin is also secreted by placenta Choose true option from following

The correct statement in respect of thalassemia in human is :

1. AWhen production of beta globin chain is affected it cause Beta thalassemia
2. BBeta thalassemia is controlled by HBA-1 and HBA-2
3. CAlpha thalassemia is controlled by HBB only
4. DThe gene of alpha thalassemia lies on chromosome no 16

Lobe Fins are the animals which can live on both land and water they give rise to

1. AReptiles
2. BAmphibia
3. CAgnatha
4. DAves

Match the following : Column I Column II P) Industrial melanism

1. i)
   Bougainvillea and Cucurbita Q) Adaptive Radiation
2. ii)
   Spores R) Panspermia
3. iii)
   Dark and light moth S) Divergent Evolution
4. iv)
   Finches Choose the correct option:

Mendel published his work in 1865.Identify the reason which could not be factor for non publishment of his work from following statement:

1. ACommunication was not easy
2. BMendel's approach of using mathematics was widely accepted
3. CHe could not prove existence of factor
4. DHis contemporaries did not accept that there are pairs of alleles which did not blend .

Which is the correct features of Human Genome project i)Chromosome 1 has most genes ii)The human Genome contains 3164.7 billion nucleotide basis. iii)More than 2 percent of genome codes for protein iv)Scientists have identified about 1.4 million location of SNPs. Option:

1. AI & ii
2. BI & iii
3. CI & iv
4. DOnly i

Which of the following do not have the ability to fix Nitrogen gas

1. AAnabaena
2. BSpirogyra
3. CNostoc
4. DAzotobacter