Unisexual and Bisexual

Q. Name the type of gametes that are formed in staminate and pistillate flowers.

Q.
Match the correct options

i) Encysted Amoeba	a) Longitudinal binary fission
ii) Paramecium	b) Multiple fission
iii) Euglena	c) Transverse binary fission
iv) Ceratium	d) Oblique binary fission

1. (i)➞b, (ii)➞c, (iii)➞d, (iv)➞a
2. (i)➞b, (ii)➞c, (iii)➞a, (iv)➞d
3. (i)➞d, (ii)➞c, (iii)➞a, (iv)➞b
4. (i)➞c, (ii)➞d, (iii)➞ b, (iv)➞a

Q.

Examine a few flowers of any cucurbit plant and try to identify the staminate and pistillate flowers. Do you know any other plant bears unisexual flowers?

Q.

Flame cell/solenocytes are main excretory structures of

1. Annelids

2. Molluscs

3. Platyhelminthes

4. Echinodermates

Q. Examine a few flowers of any cucurbit plant and try to identify the staminate and pistillate flowers. Do you know any other plant that bears unisexual flowers?

Q.

What is a bisexual flower? Collect five bisexual flowers from your neighbourhood and with the help of your teacher find out their common and scientific names.

Q.

Staminate and pistillate flowers are present on separate plants in Papaya, Date palm and Vallisneria

1. True

2. False

Q. Why is Sexual Reproduction Favoured By Unicellular Organisms (Which Generally Undergoes Asexual Reproduction) during Unfavorable Conditions?

Q.

What are metanephridia?

Q.

Self-fertilisation is rare in bisexual animals.

1. True

2. False

Q. Choose the incorrect option regarding staminate flower.

1. Unisexual male flower
2. Active pistils present
3. Active stamens present
4. Produce pollen grains

Q.

Give examples of staminate flowers.

Q.

How does leech do reproduction?

Q. Read the following features of organism from (i) to (iii) and identify organism according to features.
(i) Possess lateral appendages for swimming.
(ii) Dioecious and coelomate
(iii) Triploblastic and bilateral symmetry

1. Nereis
2. Earthworm
3. Leech
4. Star fish

Q. Mutualism occurs between
a butterfly and flower
b escherichia coli and man
c zoo chlorella and hydra
d hermit crab and sea anemone

Q. What are hermaphrodites? Give example.

Q. Which of the following symbols represents the consanguineous mating?

1. 
2. 
3. 
4. 

Q. How does the Euglena reproduce asexually?

1. Transverse binary fission
2. Longitudinal binary fission
3. Multiple fission
4. Irregular binary fission

Q. Which of the following is a bisexual animal?

1. Snail
2. Starfish
3. Earthworm
4. All of the above

Q. Genetic diversity is greatest in

1. parthenogenesis
2. sexual reproduction
3. asexual reproduction
4. binary fission

Q.

What is a bisexual flower? Collect five bisexual flowers from your neighborhood and with the help of your teacher find out their common and scientific names.

Q.

Staminate and pistillate flowers are present on separate plants in Papaya, Date palm and Vallisneria

1. True

2. False

Q. Give the names of bisexual animals.

Q.

Examine a few flowers of any cucurbit plant and try to identify the staminate and pistillate flowers. Do you know any other plant that bears unisexual flowers?

Q. Which one of the following shows isogamy with non-flagellated gametes?

1. Sargassum
2. Ectocarpus
3. Ulothrix
4. Spirogyra

Q. The animals that consists of both male and female sex organs are known as

1. Viviparous
2. Oviparous
3. Sterile
4. Hermaphrodite

Q. Differentiate between.
Monoecious and dioecious plants

Q. What are hermaphrodite?

Q. The most probable cause for the situation in which a dicotyledonous plant does not produce fruits and seeds is

1. Plant has bisexual flowers.
2. Plant is dioecious and has staminate flowers
3. Plant is dioecious and produces only pistillate flowers
4. Plant is dioecious and produces staminate and pistillate flowers

Q. Match the following columns :

	Column I		Column II
A.	Sea lemon	1.	Doris
B.	Sea mussel	2.	Mytilus
C.	Garden snail	3.	Helix
D.	Grey slug	4.	Limax

1. A-1, B-2, C-3, D-4
2. A-4, B-3, C-2, D-1
3. A-4, B-2, C-3, D-1
4. A-3, B-4, C-1, D-2