Sperms released in water are carried to the mesenchyme in sponges by__________?

Related Mcqs:

1. The sponges in which sperms develop first are included in the category of__________?

   A. Peritandrous
   B. Pertandrous
   C. Protendrous
   D. Protandrous

2. Sperms of liverworts, mosses, ferns move towards archegonia, in response to uncleic acid released by the ovum. This is an example of ____________?

   A. Chemotropic movement
   B. Chemotactic movement
   C. Chemosastic movement
   D. Haptonastic movement

3. Sperms are _________ in origin.

   A. Ectodermal
   B. Mesodermal
   C. Endodermal
   D. None of these

4. The skeleton of the sponges is in the form of variously shaped needle like structures called___________?

   A. Stripules
   B. Spicules
   C. Brails
   D. Spines

5. Inner layers of the sponges are made up of__________?

   A. Pinacocytes
   B. Choanoderm
   C. Choanoytes
   D. Pinacoderm

6. The skeleton of sponges is made up of___________?

   A. Calcium
   B. Silica
   C. Both of these
   D. None of these

7. 80% of the food of sponges consists of__________?

   A. Detrital organic particles
   B. Zooplankton and small animals
   C. Phytoplanktons
   D. all of these

8. In sponges fertilization takes place in____________?

   A. Ectoderm
   B. Mesenchyme
   C. Endoderm
   D. Uterus

9. Mastication is carried out by__________?

   A. Teeth
   B. Tongue
   C. Smooth muscles
   D. All of these

10. Most of the photosynthesis on earth is carried by__________?

    A. Kelps
    B. Gymnosperms
    C. Angiosperms
    D. Algae