問題一覧
1
What is the systematic position of coleochaete genus of algae?
Streptophyta division ➝ Coleochaetophyceae class ➝ Coleochaetales order ➝ Coleochaetaceae family➝ Coleochaete genus
2
Majority of coleochaete algae are
Epiphytic
3
The thallus of Coleochaete is described as:
Heterotrichous
4
In many species of Coleochaete, the filaments of the projecting system are arranged to resemble:
A disc or cushion
5
The type of branching observed in Coleochaete is:
Dichotomous
6
The thalli of coleochaete algae is commonly surrounded by gletanous envelope. True or flase?
True
7
What feature is present in almost all thalli of the genus Coleochaete?
Chaetae
8
The chaete of coleochaete is a prolongation of what?
Cell wall
9
The cell wall of coleochaete consists of two layers. Inner is cellulose and outer is?
Pectose
10
The cells of Coleochaete are:
Uninucleate
11
The chloroplasts in Coleochaete cells are shaped like a:
Girdle
12
The motile bodies in Coleochaete are characterized by:
Being biflagellate without eye spots
13
Where are zoospores produced in Coleochaete?
In ordinary cells
14
How do zoospores exit the parent cell in Coleochaete?
Through a round pore at the apex
15
The type of sexual reproduction in Coleochaete is:
Oogamous
16
The plants of Coleochaete can be:
Either heterothallic or homothallic
17
The shape of the oogonium in Coleochaete pulvinata is:
Flask-shaped
18
What does the basal portion of the oogonium of coleochaete contain?
Both an egg and chloroplasts
19
Oogonia in Coleochaete develop at:
Terminal ends of branches
20
The neck-like terminal portion of the oogonium of coleochaete is called:
Trichogyne
21
Where do the antheridia develop in Coleochaete?
On the terminal ends of the lateral branches
22
How many antherozoids develop in each antheridium of Coleochaete?
One
23
What develops from the base of the oogonium after fertilization in Coleochaete?
Outgrowths forming a pseudoparenchymatous structure
24
The round reddish brown body formed after fertilization in Coleochaete is called:
Spermocarp
25
Life cycle of coleochaete genus algae is:
Haplontic
26
What is the systematic position of chara genus of algae?
Streptophyta division ➝ Charophyceae class ➝ Charales order ➝ Characeae family➝ Chara genus
27
Why are Charales order plants commonly referred to as stoneworts?
Their plant body is coated with calcium carbonate
28
Which types of reproduction are present in Charales?
Only sexual reproduction and vegetative reproduction
29
What is the type of generation of vegetative structure in Chara?
Gametophyte
30
Sexual organs in Chara are
Well jacketed: Globule and nucule
31
How Chara grows?
Chara is hydrophytic: benthophytic and remain submerged in water
32
Chara grows best in
Hard freshwater
33
Identify the plant/algae: (i) Main body is gametophytic (ii) Avascular (iii) Asexual reproduction is absent (iv) Sexual reproduction is oogamous (v) Body encrusted with calcium carbonate (vi) Prefers to grow in hard freshwater
Chara
34
Which plant help deposit calcium in the bottom of lake?
Chara
35
Which of the following aquatic plants possesses a well developed rhizoidal system?
Chara
36
Botanically, the leaves of Chara are?
Branched of limited growth
37
The dome shaped apical cell of Chara divides as:
Posteriorly and upper daughter cell is node initial, lower is internode initial
38
Which of the following are features of internodal cell of Chara? (I) Long cell (II) Uninucleate (III) Discoid chloroplasts and forms a layer (IV) Cytoplasm is uniform and undifferentiated (V) Endoplasm show streaming (VI) Large central vacuole present
I, III, V, VI
39
What grows from nodal cells of main axis of Chara?
Cortex, branches and stipulodes
40
Rhizoids of Chara have what kind of septa?
Oblique septa
41
Which of the following reproduces by formation of star shaped body?
Chara
42
Chara does not reproduce asexually by this method:
Asexual spores
43
Sexual reproduction strategy of Chara is?
Oogamous
44
In Chara, the sexual organs of globule and nucule are borne on?
Nodes of secondary laterals
45
In homothallic species of Chara, what is the arrangement of nucule and globule?
Globule and nucule are borne on same node but nucule is always above the globule
46
What acts as globule and nucule initial in Chara?
Adaxial nodal cell of shoot of limited growth
47
In development of globule of Chara, periclinical cell division starts when
Octant stage is reached
48
The globule of Chara is orange red in color due to?
Shield cells developing this color
49
Match the following wrt Chara's globule (I) Shield cells (a) Arranged compactly at center (II) Manubrial cells. (b) Radially elongated (III) Capitulum cells. (c) Infoldings on walls
(I) - c (II) - b (III) - a
50
What acts as initials of antheridial filaments in globule of Chara?
Capitulum cells
51
Antheridia in Chara are morphologically?
Uniseriate filamentous which maybe branched or unbranched
52
What acts as the corona of the nucule of Chara?
Coronary cells
53
How does the antherozoids of Chara enter the nucule?
Through slit pores below the corona
54
In Chara's zygote germination, when does lenticular cell form?
After the first division which is meiotic
55
Life cycle of Chara is
Haplontic