Monoecious and Dioecious

Q.

Name a monoecious and bisexual plant.

Q.

Is pinus dioecious?

Q. Match the following (column 1 with
column 2):

$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{p. Monoecious plant}& \text{1. Tapeworm}\\ \text{q. Dioecious plant}& \text{2. Coconut}\\ \text{r. Bisexual animal}& \text{3. Cockroach}\\ \text{s. Unisexual animal}& \text{4. Papaya}\end{array}$

1. p-2, q-4, r-3, s-1
2. p-4, q-2, r-3, s-1
3. p-4, q-2, r-1, s-3
4. p-2, q-4, r-1, s-3

Q.

Which among the following set possess unisexual flowers?

1. Date palm, Coconut, Castor, Maize

2. Cycas, China rose, Onion, Vallisneria

3. Marchantia, Pinus, Smilax, Rice

4. Cucurbita, Papaya, Chara, Sweet potato

Q.

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.

Q.

What is a bisexual flower? Mention four bisexual flowers from your neighbourhood with their scientific names.

Q. Choose the odd one out.

1. Monoecious - Date palm
2. Unisexual species - Cockroach
3. Dioecious - Marchantia
4. Bisexual - Earthworm

Q. Select the odd one out with respect to the pollen grains.

1. It can be stored for years in liquid nitrogen
2. Pollen grains possess non-sticky covering called pollen kitt
3. It's consumption increases the performance of athletes and race horses
4. Pollen grains are rich in nutrients

Q.

Cyathium and hypanthodium inflorescence are related in having

1. Nectar glands

2. Unisexual flower

3. Both (1) and (2)

4. None of these

Q.

Identify the parts labelled 1 and 2 in the given figure

1. 1 - Anthredium, 2 - Archegonium

2. 1 - Ascogonium, 2 - Antheridium

3. 1 - Oogonium, 2 - Antheridium

4. 1 - Antheridium, 2 - Carpogonium

Q. [A]: Grasses show wind pollination
[R]: Poaceae members have sticky pollen grains

1. Both A and R are true and R is the correct explanation of A
2. Both A and R are true but R is not the correct explanation of A
3. A is true but R is false
4. A and R are false

Q. An example of a dioecious plant is

1. Cucumber
2. Date palm
3. Maize
4. Castor bean

Q. What are monoecious plants?

Q. An example of dioecious plant is

1. Pinus
2. Maize
3. Cycas
4. Chara

Q. Papaya plant is dioecious.

1. True
2. False

Q. Unisexual flower is

1. Corn
2. Rose
3. Petunia
4. None of these

Q. Plant with both carpels and stamens is

1. Carpellate
2. Hermaphrodite
3. Staminate
4. None of the above

Q. Study the figure and answer the following:​




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?​

Q. An example of a monoecious plant is

1. Tomato
2. Rose
3. Shoe flower
4. Cucumber

Q. Monoecious plants are:

1. If both male and female reproductive structures are present but flowers are bisexual.
2. If both male and female reproductive structures are present on the same plant but flowers are unisexual.
3. If both gynoecium and androecium are present in same flower.
4. If both male and female reproductive structures are present on different plants but the flowers are unisexual.

Q.

Which among the following set possess unisexual flowers?

1. Cucurbita, Papaya, Chara, Sweet potato

2. Date palm, Coconut, Castor, Maize

3. Cycas, China rose, Onion, Vallisneria

4. Marchantia, Pinus, Smilax, Rice

Q. Male and female flowers are present on different plants (dioecious) to ensure xenogamy, in ___________.

1. Papaya
2. Maize
3. Bottle gourd
4. All of the above

Q. Coconut palm is monoecious while Date is dioecious. Why are they called so?

Q.

What are the methods to prevent plants from flowering?

Q. Match the following (column 1 with
column 2):

$\begin{array}{cc}\text{Column 1}& \text{Column 2}\\ \text{p. Monoecious plant}& \text{1. Tapeworm}\\ \text{q. Dioecious plant}& \text{2. Coconut}\\ \text{r. Bisexual animal}& \text{3. Cockroach}\\ \text{s. Unisexual animal}& \text{4. Papaya}\end{array}$

1. p-2, q-4, r-3, s-1
2. p-4, q-2, r-1, s-3
3. p-2, q-4, r-1, s-3
4. p-4, q-2, r-3, s-1

Q. Isogamous condition with non-flagellated gametes is found in

1. Volvox
2. Fucus
3. Spirogyra
4. Chlamydomonas

Q. Write the difference between unisexual and bisexual animal. Give one example of each.

Q. Assertion :Cucurbita is a monoecious plant. Reason: In Cucurbita, both male and female flowers are present on the same plant.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Which of the following options shows bisexual animals only?

1. Earthworm, sponge, leech
2. Amoeba, sponge, leech
3. Sponge, cockroach, Amoeba
4. Tapeworm, earthworm, honeybee

Q. Staminate flower produce

1. Antherozoids
2. Fruits
3. All of the above
   
4. Eggs