Question

True or False

1. according to the theory of evolution, an animal with simple photoreceptors gave birth to the offspring with image-forming camera eyes

2. It is thought that the various animal phyla evolved independently from different single-celled ancestors  

3. Arthropods and tetrapods are considered to be each other's closest relatives because both have paired, jointed limbs

4. Arthropods, mollusks, and nematodes are all deuterostomes

5. Flatworms and cnidarians are considered to be each others closest relatives because both lack an arse

6. All animals except sponges and cnidarians have mesoderm

7. A bee has a higher degree of cephalization than a jellyfish

8. The Cambrian explosion is thought to be what drove (most) dinosaurs to extinction

9. Fossil evidence indicates that multicellular animals and plants evolved within a hundred million years after the origin of the cells

9. For most of the history of animals (according to the fossil record), there have been animals walking or creeping on the land

10. Mitochondria have DNA with genes that are similar to bacterial genes

Answer 1

1. TRUE - camera eye was developed in due course of time from simple photoreceptors.

2 FALSE - This is not a true sentence. The various animal phyla originates from the previous phylum.

3-FALSE Though they both share paired jointed limbs but anatomically they are very much different and there are many characters by which they differ from each other.

4- FALSE - They are all protostomes because blastopores develop into mouth in them. Echinodermata and chordates are deuterostomes.

6-FALSE - besides sponge and cnidaria, platyhelminthes and nematodes also lacks mesoderm

7-TRUE -Bee has sensory organs accumulated in the anterior part of the body forming head, jelly fish lacks it.

8-FALSE Cambrian explosion is responsible for origin of a vast number od=f species in Cambrian period.Dinosaurs goes extinct only 65 million years ago at the cretacious period of Mesozoic era.

9. False - Most of the animal phylum are aquatic and besides arthropods and after fishes (from amphibia to mammals) all are aquatic which lives in water and do not comes to land.

10-TRUE As mitochondria was once an aerobic free living bacteria, they share many genes with bacteria.