Monoecious and Dioecious
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Name a monoecious and bisexual plant.
Is pinus dioecious?
column 2):
Column 1Column 2p. Monoecious plant1. Tapewormq. Dioecious plant2. Coconutr. Bisexual animal3. Cockroachs. Unisexual animal4. Papaya
- p-2, q-4, r-3, s-1
- p-4, q-2, r-3, s-1
- p-4, q-2, r-1, s-3
- p-2, q-4, r-1, s-3
Which among the following set possess unisexual flowers?
Date palm, Coconut, Castor, Maize
Cycas, China rose, Onion, Vallisneria
Marchantia, Pinus, Smilax, Rice
Cucurbita, Papaya, Chara, Sweet potato
Choose the correct statement from amongst the following:
(a) Dioecious (hermaphrodite) organisms are seen only in animals.
(b) Dioecious organisms are seen only in plants.
(c) Dioecious organisms are seen only in both plants and animals.
(d) Dioecious organisms are seen only in vertebrates.
What is a bisexual flower? Mention four bisexual flowers from your neighbourhood with their scientific names.
- Monoecious - Date palm
- Unisexual species - Cockroach
- Dioecious - Marchantia
- Bisexual - Earthworm
- It can be stored for years in liquid nitrogen
- Pollen grains possess non-sticky covering called pollen kitt
- It's consumption increases the performance of athletes and race horses
- Pollen grains are rich in nutrients
Cyathium and hypanthodium inflorescence are related in having
Nectar glands
Unisexual flower
Both (1) and (2)
None of these
Identify the parts labelled 1 and 2 in the given figure
1 - Anthredium, 2 - Archegonium
1 - Ascogonium, 2 - Antheridium
1 - Oogonium, 2 - Antheridium
1 - Antheridium, 2 - Carpogonium
[R]: Poaceae members have sticky pollen grains
- Both A and R are true and R is the correct explanation of A
- Both A and R are true but R is not the correct explanation of A
- A is true but R is false
- A and R are false
- Cucumber
- Date palm
- Maize
- Castor bean
- Pinus
- Maize
- Cycas
- Chara
- True
- False
- Corn
- Rose
- Petunia
- None of these
- Carpellate
- Hermaphrodite
- Staminate
- None of the above
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/1677786/original_1.png)
Label the parts 1-4.
(i) Label the parts 1-4.
(ii) Is it a unisexual or bisexual flower?
(iii) Give reason to support your answer above(ii).
(iv) What is the role of part-4?
- Tomato
- Rose
- Shoe flower
- Cucumber
- If both male and female reproductive structures are present but flowers are bisexual.
- If both male and female reproductive structures are present on the same plant but flowers are unisexual.
- If both gynoecium and androecium are present in same flower.
- If both male and female reproductive structures are present on different plants but the flowers are unisexual.
Which among the following set possess unisexual flowers?
Cucurbita, Papaya, Chara, Sweet potato
Date palm, Coconut, Castor, Maize
Cycas, China rose, Onion, Vallisneria
Marchantia, Pinus, Smilax, Rice
- Papaya
- Maize
- Bottle gourd
- All of the above
What are the methods to prevent plants from flowering?
column 2):
Column 1Column 2p. Monoecious plant1. Tapewormq. Dioecious plant2. Coconutr. Bisexual animal3. Cockroachs. Unisexual animal4. Papaya
- p-2, q-4, r-3, s-1
- p-4, q-2, r-1, s-3
- p-2, q-4, r-1, s-3
- p-4, q-2, r-3, s-1
- Volvox
- Fucus
- Spirogyra
- Chlamydomonas
- Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
- Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
- Assertion is correct but Reason is incorrect
- Both Assertion and Reason are incorrect
- Earthworm, sponge, leech
- Amoeba, sponge, leech
- Sponge, cockroach, Amoeba
- Tapeworm, earthworm, honeybee
- Antherozoids
- Fruits
- All of the above
- Eggs