Properties of Triangles
Trending Questions
Q.
In the given fig. a circle is inscribed in a quadrilateral ABCD in which ∠B = 900. If AD = 23 cm AB = 29 cm and DS = 5 cm, find the radius of the circle (in cm).
Q.
In a circle, O is the centre and ∠COD is right angle. AC = BD and CD is the tangent at P. Which of the following are true, if the radius of the circle is 1 m?
BD = 41.42 cm
OD = 141.42 cm
PD = 100 cm
AC + CP = 141.42 cm
Q. What is the value of perimeter of a triangle, if the inradius is 5 cm and area is 10 sq. cm?
- 4 cm
- 2 cm
- 6 cm
- 5 cm
Q.
The most common, flagellated asexual spores of algae are called
- oospore
- aplanospores
- zoospores
- zygospore
Q. Which of the following undergoes meiosis in algae?
- Zoospore
- Zygote
- Aplanospore
- Algae never undergo meiosis as they are haploid
Q. Asexual reproduction by non-motile spores is seen in
- Ectocarpus
- Porphyra
- Chlamydomonas
- kelps
Q. Zoospores are formed inside special structures called zoosporangium.
- False
- True
Q. All the offspring formed during fragmentation and zoospore formation are identical to the parent algae.
- False
- True
Q. Choose the false statement.
- Spores of class Rhodophyceae do not have flagella
- Spores of Phaeophyceae - are round in shape
- Spores of class Chlorophyceae have many flagella
- Spores of class Phaeophyceae have laterally attached flagella
Q. Choose the wrong statement.
- Spore formation is a type of vegetative reproduction.
- During fragmentation the plant thallus breaks into many fragments and each fragment grows into a new offspring.
- Fragmentation is a type of vegetative reproduction.
- Generally filamentous algae undergo fragmentation.