Question

QUESTION 17 The term autotroph refers to an organism that must obtain organic compounds for its carbon needs. uses CO2 for its carbon source. gets energy from sunlight. does not need a carbon source. gets energy by oxidizing chemical compounds.

Answer 1

Question 17

The right answer is 3rd option or " gets energy from sunlight "

Explanation

The autitrops oraganism are those who produce there own food or energy source by using Sunlight or chemical energy .

Question 18

The right answer is last option or " H_{​​​​​2}​​​​​O"

Explanation

Water is present abundantly in a cell . 70% of water is present in a cell as a nutrient source .

Question 19

The right answer is 1st option or " any of the above can be used "

Explanation

Coulter counter is help to determine the size and counting of cells it also can be used to count bacterial growth

cytometry also help to determine cell size so it can be determine the bacterial growth or number.

On the other hand looking ar turbidity and cloudiness is a process to determine vlbacterial growth.

Question 20

The right answer is 3rd option or " hypotonic"

due to turgor pressure in hypotonic solution cell uptake water from outside the cell and swell up.In case of animal cell the cell burst occurs but in case of plant cell, cell wall prevent the busting of the cell membrane.