Day Neutral Plants

Q.

Day neutral plant relates to

1. Loss of activity during daytime

2. Overactive during daytime

3. Flowering in all possible photoperiods

4. No flowering in any photoperiod

Q.

Short day plants flower

1. When night exceeds a critical photoperiod.

2. When dark period is interrupted by flash of light

3. When the night length is shorter than critical period

4. When the night length is shorter than a critical dark period but the day length is interrupted with a short dark period

Q. Day neutral plants are characterised by

1. loss of activity during day time
2. overactive during day time
3. flowering in all photoperiods
4. no flowering in any photoperiod

Q. Day neutral plants

1. Lose activity during day time
2. Flower in all possible photoperiods
3. Become overactive during day time
4. Do not flower in any photoperiod

Q. The day neutral plant is

1. Tobacco
2. Tomato
3. Wheat
4. Oat

Q. Dianthus has ............ mode of dehiscence.

1. Extrose
2. Both A and B
3. None of the above
4. Introse

Q.

Day neutral plant relates to

1. Loss of activity during daytime

2. Overactive during daytime

3. Flowering in all possible photoperiods

4. No flowering in any photoperiod

Q. Identify the mismatch from the following.

1. LDP - Requires a day duration of 14 - 16 hrs.

2. DNP - Requires a day duration of 10 - 14 hrs.

3. Leaves - Perceive light/dark.

4. SDP - Requires a day duration of 8 - 10 hrs

Q. Gibberellins induce

1. flowering
2. cell division
3. production of hydrolytic enzymes in germinating seeds
4. leaf senescence

Q. Which of the following made pineapple to flower in off season?

1. Zeatin
2. Ethylene
3. Temperature
4. Short-days

Q. Plants yields latex is

1. Ficus
2. Sonchus
3. Calotropis
4. All of the above

Q. Photoperiod affect the _____.

Q. Very short answer type.
Why are day neutral plants called intermediate plants?

Q. Plants which disregard the requirement of a definite day length for the following are called

1. Short day plants
2. Long day plants
3. Long short day plants
4. Day neutral plants

Q. If a tree flowers thrice in a year in October, January and July in northern India, the plant is

1. Photo- and thermo-sensitive
2. Photo- and thermo-insensitive
3. Photosensitive but thermo-insensitive
4. Thermosensitive but photo-insensitive

Q. DNP is

1. Cestrum
2. Cucumber
3. Potato
4. Radish

Q. Flowering in short day plants is induced by

1. Long day with interrupted night
2. Short days and interrupted long nights
3. Short days and uninterrupted long nights
4. Short nights

Q. Plants which disregard the requirement of a definite day length for flowering are called

1. Long day plants
2. Short day plants
3. Day neutral plants
4. Long-short day plants

Q. Choose the correct answer from the alternatives given.
The flowering process is a response.

1. phototropic
2. photoperiodic
3. geotropic
4. thigmotropic

Q. a short day plant, a long day plant and a day neutral plant can flower simultaneously in a given place. give reason how it is possible

Q. A hypothetical chemical believed to be involved in flowering is

1. Gibberellin
2. Florigen
3. IAA
4. NAA

Q. Identify the mismatch from the following.

1. SDP - Requires a day duration of 8 - 10 hrs
2. LDP - Requires a day duration of 14 - 16 hrs.
3. DNP - Requires a day duration of 10 - 14 hrs.
4. Leaves - Perceive light/dark.