Answer:
Cartilaginous fish include sharks, rays, skates and chimaeras. There are approximately 600 different species of rays and skates and about 500 shark species. Rays and skates live in oceans throughout the world.
Explanation:
Answer:
<em>Increased immigration</em>
Explanation:
Population growth generally refers to increase in population size or the number of individuals in a particular area. Population growth is influenced by four fundamental factors which are;
- Death rate
- Birth rate
- Immigration
- Emigration
While death and emigration negatively affect population growth because individuals are exiting the population, immigration and birth add new individuals into the population and positively affect population growth.
Hence, from all the available options, only increased immigration can lead to an increase in a country's population growth rate.
Answer:
B
Explanation:
Chemoreception is a physiological process where an organism reacts to a chemical stimulus in their environment.
Pheremones are chemical substances that organisms release into their environments as a form of communication.
Pheremones bind to chemoreceptors which causes a response once the nervous system of the bee has analyzed and identified the chemical substance. The bee can then react with further communication.
Answer:
The organism that can live deep beneath the earth surface despite intense pressure heat lack of water and sunlight might be Nematodes.
Explanation:
- Nematodes are able to cope extreme heat or extreme cold and dehydration. They have adopted by learning technique that allows them to survive. They can transform into a hardy form called the dauer stage.
- They can survive harsh conditions for longer durations at this stage. And again awaken themselves when conditions are favourable again.
- They can be found in hot springs, deserts, high up mountains and in the deepest oceans.
C.) The green revolution instrumental in the increase of the worlds food supply.
<span />