Why do gametes produced in large numbers in organisms exhibit external fertilization? Answer: … (ii) Producing large number of gametes increase the chance for at least some eggs and sperms to meet in the environment ensuring that atleast a stable number of off spring are able to survive and carry on.
Why is it necessary to produce large number of eggs and sperms by the animals which reproduce by external fertilization?
Explanation: External fertilization in an aquatic environment protects the eggs from drying out. … Therefore, millions of eggs must be produced by individuals. The offspring produced through this method must mature rapidly. The survival rate of eggs produced through broadcast spawning is low.
Why do organisms exhibit external Fertilisation?
External fertilization in an aquatic environment protects the eggs from drying out. Broadcast spawning can result in a greater mixture of the genes within a group, leading to higher genetic diversity and a greater chance of species survival in a hostile environment.
Why gametes are produced in large number in organisms that exhibit external fertilization?
(i) In external fertilisation, there is a great chance that the sperm and the eggs released by the organisms can be affected by factors present in the environment like dessication predators, etc. So, to make up for the high fatality rate of the gametes, the organisms produces a lot of gametes.
Why do animals exhibit external fertilization produce a large number of gametes?
The external fertilisation is the process of fusion of male and female gametes outside the body or in outer environment. As animal releases gametes in the external environment, there are the minimum chances of fertilisation and thus, large number of male gametes are produced to ensure better chances of fertilisation.
Why some animals produce large number?
The number of offspring a species produces is finely tuned to optimize its chances for survival. Often, the geography and resources available to the females influence the number of offspring that the species produces as well. …
Why do many organisms produce thousands of offspring?
Organisms produce more offspring than actually survive. … One reason that not all organisms survive is that there are not enough resources, things that they need, to go around. Organisms must struggle to get what they need to survive, competing against other organisms that want the same things they do.
Why do only male gametes have a tail?
The tail helps the sperm to swim through the reproductive tract of the female to reach the oviduct. … The male gametes, i.e., sperms are produced within the male reproductive system.
Why do organisms make gametes?
Gametes serve two functions. They have the physiological capability to fuse with a gamete from the opposite sex and form a single cell (a zygote) that initiates the development of a new organism and the next generation.
Why do aquatic animals produce a large number of sperms and eggs?
This is because the eggs and sperms get exposed to water movement, wind and rainfall. … Thus, production of large number of eggs and sperms is necessary to ensure fertilization of at least a few of them.
What process is the fusion of gametes that create a zygote?
During the process of fertilization, a series of reactions triggers the fusion of gametes to produce a diploid cell called a zygote.
What requires the production of a large number of gametes to ensure survival of the species?
Water promotes production of large number of gametes.
Does water promotes production of large number of gametes?
(d) Water promotes the production of a large number of gametes. Explanation: Because they release gametes in water chances of getting washed away by water, wind and rain are more. Hence To ensure a better chance of fertilisation.