Question

58. The foll owing events in the history of life on Earth are out of order. Put a 1 next to the event that happened earliest and number them sequentially. (3 points) Origin of primates Evolution of photosynthesis Origin of mitochondria Colonization of land by animals First multicellular eukaryotes Cambrian Explosion . As the Permian era came to close, a period of rapid speciation occurred and new animal and plant forms evolved. Give 2 reasons or mechanisms that lead to this speciation. (2 points) (2 points) Batrachotoxin is a poison isolated from the poison dart frog that is used by the Chocó native population in Colombia on their hunting darts. Batrachotoxin binds to voltage-gated Na-channels and keeps hem in the open' position. Describe how the action of batrachotoxin could make hunting easier. Be brief, ut specific

Answer 1

Answer. 1.

First : (1) was the evolution of photosynthesis.

Second :(2) origin of mitochondria.

Third: (3) First multicellular eukaryotes.

Fourth: (4) Cambrian explosion

Fifth:(5) Colonization of land by animals.

Sixth: (6) Origin of primates.

Answer: 2

The two reasons for rapid speciation after permian era closed.

(i). Few organism that survived the end permian extinction quickly diversified to fill the vacant niches left by the almost total annihilation of the sea dwellers.

(ii) Survival of the fittest played a major role in rendering the descendents of the species that survived after permian extinction making them more adaptable to climate change.

Answer 3: Batrachotoxin upon entering the body causes muscle and nerve depolarization, fibrillation, arrhythmias and heart failure. These deadly effects are caused by batrachotoxin by interfering with the body's ability to transmit electrical signal by means of action potential and thereby causes numbness in the body making hunting easier.