BC

Question 1

A:- True sexual reproduction is absent in bacteria.
R:- Bacteria have only one bacterial chromosome.

Answer 1

(2)

R:- may agr Esa likha hota ki bacteria n hote hai to vo bhi shi may

Question 2

A:- All protozoans are heterotrophs.
R:- Protozoans are believed to be primitive relatives of animals.

Answer 2

(2)

Question 3

A:- In phycomycetes, zygospores are formed during sexual reproduction.
R:- They are meiotic spores.

Answer 3

(3)

Zygospores are product of fertilization yani zygote (2n) hai

Question 4

A:- Chemosynthetic autotrophic bacteria oxidize various organic substances such as nitrates, nitrites and ammonia.
R:- Chemoautotrophs are found in kingdom monetary and plantae.

Answer 4

(4)

A:- kuch organic ko bhi oxide kar sakta hai but such as ke bad inorganic compound like huye hai

R:- Plant photoautotrophs hote hai and chemoautotrophs only kingdom monera may milte hai

Question 5

A:- Virus are obligate intracellular parasites. ( avikalpi anta: koshikiye parjivi)
R:- They are inert outside their specific host cell and take over the cellular machinery of the host to replicate.

Answer 5

(1)

Question 6

A:- During red tides fishes may be killed.
R:- Red tides decrease O2 level in water.

Answer 6

(3)

Red tides may Gonyaulax ki high growth jo kuch toxins (saxitoxin) release karte hai jisse fishes Mar jati hi

Algal bloom may, water may O2 ki kami se fishes Marti hai

Question 7

A:- Dikaryophase (n+n) of fungus is the resultant of kryogamy.
R:- Karyogamy produces (n+n) condition.

Answer 7

(4)

Dikaryophase plasmogamy se hi ban Jata hai