Table of Contents
- 1 Why is it important for organisms to have many offspring?
- 2 What is the difference between R and K selected species?
- 3 What increases the chance that a trait will be passed onto offspring?
- 4 Why are rabbits r selected species?
- 5 Is it possible for a male to produce more offspring?
- 6 What are the advantages and disadvantages of asexual reproduction?
Why is it important for organisms to have many offspring?
Organisms that produce large numbers of offspring tend to make a relatively small energy investment in each, and don’t usually provide much parental care. Organisms that make few offspring usually make a large energy investment in each offspring and often provide lots of parental care.
Why do only beneficial traits tend to get passed onto offspring?
Over time, beneficial traits will become increasingly prevalent in descendant populations by virtue of the fact that parents with those traits consistently leave more offspring than individuals lacking those traits. Organisms do not evolve; populations evolve.
What is the difference between R and K selected species?
r-selected babies grow rapidly, and tend to be found in less competitive, low quality environments. K-selected species produce offspring that each have a higher probability of survival to maturity.
Do r-selected species have many offspring?
r-selected species are adapted to unstable and unpredictable environments. They have large numbers of small offspring. Animals that are r-selected do not provide a lot of resources or parental care to offspring, and the offspring are relatively self-sufficient at birth.
What increases the chance that a trait will be passed onto offspring?
Genetic variations that alter gene activity or protein function can introduce different traits in an organism. If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation (a process known as natural selection).
What is the difference between the words adapt and acclimate?
Adaptation refers to a shift in genotype and phenotype over generations in response to prolonged environmental pressure. Acclimation or acclimatization is the process where by an organism adjust in a smooth way to absorb the stress or shock condition that occur in the environment.
Why are rabbits r selected species?
But at its most basic “r” species put a little effort into raising a lot of young that have a great probability of mortality. And they have the ability to reproduce rapidly. Bacteria, diatoms, insects, grasses and small mammals especially rodents fall into this category. And yes rabbits.
Why are organisms able to reproduce without a mate?
It is easier, faster, uses a lot less energy, a mate is not required, and the result is an offspring which is fully matured, and can protect and care for itself. With sexual reproduction, finding a mate can be challenging.
Is it possible for a male to produce more offspring?
There is a broad assumption in this scenario that males do not help with the care and feeding of offspring, although in a small proportion of species they do help: people, wolves, foxes and most songbirds. In these species it is possible to produce more offspring because of the help of the male.
How does parthenogenesis allow organisms to reproduce without sex?
Parthenogenesis is an adaptive strategy that allows organisms to reproduce when sexual reproduction is not possible due to environmental conditions. Parthenogenesis that happens by apomixis involves the replication of an egg by mitosis resulting in diploid cells that are clones of the parent.
What are the advantages and disadvantages of asexual reproduction?
Asexual reproduction can be advantageous to organisms that must remain in a particular environment and in places where mates are scarce. Numerous offspring can be produced without “costing” the parent a great amount of energy or time. A disadvantage of this type of reproduction is the lack of genetic variation.