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

Related Mcqs:

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

   A. Amoeboid cell
   B. Stipules
   C. Spicules
   D. Spines

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

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

3. 80% of the food of sponges consists of__________?

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

4. Sperms are _________ in origin.

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

5. 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

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

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

7. The skeleton of sponges is made up of___________?

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

8. In sponges fertilization takes place in____________?

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

9. In slime molds spores develop into__________?

   A. Swarm cells
   B. Biflagellated cells
   C. Amoeboid reproductive cells
   D. All of these

10. Sporangia of which of the following tracheopytes develop singly on the upper side of sporophylls which may or may not be arranged to form strobili_____________?

    A. Psilopsida
    B. Lycopsida
    C. Sphenopsida
    D. Prteropsida