An unbroken series of species arranged in ancestors to descendent sequence with each later species having evolved from one that immediately preceded it is called?

1. 1. Community
   2. Phyletic lineage
   3. Biome
   4. Population

Which one of these structures involved in replication of bacterial dna?

1. 1. Pilli
   2. Plasmid
   3. Mesosome
   4. Chromosomes

_____ is the potential source of chemical energy for cellular activities?

1. 1. C-N bond
   2. P-O-C bond
   3. C-H bond
   4. C-O bond

Virus is_____.

1. 1. Acellular
   2. Multicellular
   3. Unicellular
   4. All of these

The chlorophyll molecule is embedded in the core of thylakoid membrane which acts as_____.

1. 1. Hydrophobic
   2. Hydrophilic
   3. Both of these
   4. None of these

One of the reasons why some people cough while eating a meal may be due to the improper movement of _____.

1. 1. Diaphram
   2. Epiglottis
   3. Larynx
   4. None of these

Microfossile often present in petroleum producing formationsare those of_____.

1. 1. Foraminiferans
   2. Heliozoans
   3. Diatioms
   4. Radiolarians

Which of the following is true about hearts of earthworm?

1. 1. They pump blood from ventral to dorsal vessel
   2. There are 5-7 pairs of heart
   3. They are present between 1-7th segments
   4. They are present lateral to the esophagus

Lenticels look like_____.

1. 1. Cars or small protrusions
   2. Stoma
   3. Sponge
   4. A big pore

Which of the following plant group first formed true leaves?

1. 1. Pteropsida
   2. Psilopsida
   3. Lycopsida
   4. Sphenopsida