Which of the following is not characteristic of equilibrial life histories? popu

Question

Which of the following is not characteristic of equilibrial life histories?

population size may be quite stable

individuals produce fewer offspring

indivivuals reproduce when young

individuals mature later

Males of different species of the fruit fly that live in the same parts of the Hawaiian Islands have different elaborate courtship rituals such as making stylized movements that attract females. What type of reproductive isolation does this represent?

behavioral isolation

habitat isolation

gametic isolation

temporal isolation

Which type of symbiotic relationship is characterized by one organism benefiting while the other is harmed?

commensalism

parasitism

mutualism

amensalism

The retention of juvenile features into adulthood is called

microevolution

exaptation

paedomorphosis

evo-devo

The idea that new species occur suddenly in the fossil record followed by long periods of little change is called punctuated equilibrium.

True

False

Which of the following is an example of a primary consumer?

shark

bear

grasshopper

phytoplankton

The maximum number of individuals that an area can support is called

logistic growth

carrying capacity

exponential growth

resource partitioning

Which of the following represents a mutualistic relationship?

lynx and snowshoe hare

zooplankton

wasps who lay eggs on living hosts

ants and acacias

Genetic drift caused by a sudden change in the environment that drastically reduces the size of a population is called

gene flow

natural selection

the bottleneck effect

The smaller the divergence in gene sequence, the greater the evolutionary distance between the organisms.

True

False

population size may be quite stable

individuals produce fewer offspring

indivivuals reproduce when young

individuals mature later

Explanation / Answer

Answer

1) In Equilibrial life history (K-selected species), the population size is fairly stable and close to carrying capacity, individuals produce few offspring which are well cared, and the maturation time is long. In these species, the individuals have a late reproductive age. Therefore, the option which is not characteristic of equilibrial life histories is individuals reproduce when young. This feature is a characteristic of r-selected species.

2) The males of different species of fruit fly perform courtship rituals and other unique behaviors which are unique to a species acts as effective reproductive barriers helps to attract the mates. These behavioral rituals help in identifying a potential mate and prevent interbreeding. This type of reproductive isolation is referred to as Behavioral isolation.

3) Parasitism is a symbiotic relationship in which one organism a parasite lives on the host organism and causes harm to the host. Therefore, the correct answer is Parasitism.

4) The evolutionary process where the juvenile features of an ancestral organism are displaced into adult forms is known as Paedomorphosis.

5) Punctuates equilibrium is a model of evolution which states that once the species is recorded in the fossil record the population becomes stable with little evolutionary change or no change for a long period of time. Therefore, the given statement is True.

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