Question 1

Pacific salmon migrate upstream and after breeding,soon die.They are termed

Accepted Answer

Pacific salmon are semelparous, which means they reproduce only once in their lifetime and then die soon after.

Question 2

In which of the following groups of organisms are most species iteroparous?

Accepted Answer

Perennial plants are the best choice because they are able to reproduce multiple times throughout their lifetime, whereas annual plants typically only reproduce once before dying. Cicadas also have a unique life cycle in which they emerge from the ground every 13 or 17 years to mate and reproduce before dying. Salmon are typically semelparous, meaning they reproduce once and then die, although there are some species that are iteroparous and are able to reproduce multiple times.

Question 3

The reproductive strategy in which relatively few young are produced at repeated intervals during an individual's life is referred to as

Accepted Answer

The reproductive strategy of producing relatively few offspring at repeated intervals is referred to as iteroparity. This is in contrast to semelparity, where an organism produces all of its offspring in a single reproductive event and then dies shortly afterward. Altricial and precocial refer to the level of development of offspring at birth, and are not related to the number of offspring produced.

Question 4

The data in Figure 10.7 support which of the following trade-offs?

Accepted Answer

The answer of  The data in Figure 10.7 support...

Question 5

The behavioral,physiological,and energetic activities involved in current reproduction result in

Accepted Answer

The activities involved in current reproduction often require significant energy and resources, which can lead to reduced future survival, fecundity (the ability to reproduce), and growth because the organism has less energy and resources to allocate to these future activities.

Question 6

A sexual system where a male gorilla mates with several females,forming pair bonds with each of them,is called

Accepted Answer

Polygyny is a sexual system in which a male mates with several females and forms pair bonds with each of them. This is commonly observed in gorillas, where a dominant male will mate with multiple females in his group. Therefore, the correct choice is D, polygyny.

Question 7

Members of the California sheephead fish species begin their life as females and then become males.This is referred to as

Accepted Answer

Sequential hermaphroditism is the process in which an individual changes its sex from female to male, as is the case with the California sheephead fish species.

Question 8

Guppies were moved from stream A,with a fish that preyed upon adult guppies,to stream B,with a fish that preyed upon juvenile guppies.After 30 to 60 generations,the guppies responded to the increased predation on juveniles relative to adults by

Accepted Answer

The guppies increased the age at which they matured in response to the increased predation on juveniles relative to adults. This is because individuals who mature later may be larger and better able to avoid predation, while younger and smaller individuals are more vulnerable. This trait was likely selected for over time, resulting in a population of guppies that mature later than their ancestors in an effort to avoid predation.

Question 9

In the presence of predators,some tadpoles grow larger and more colorful tails to avoid lethal strikes to the head.This ability to respond to the environment via morphological traits is known as

Accepted Answer

Phenotypic plasticity refers to the ability of an organism to change its physical and biochemical traits in response to the environment. In this scenario, the tadpoles are changing their tail size and color to increase their chances of survival from predators. The other options, outcrossing, dioecious, and K-strategy, do not relate to this specific scenario.

Question 10

An insect larva that is immediately ready to move and feed after birth is termed

Accepted Answer

The term "precocial" refers to organisms that are born with a degree of maturity and are immediately able to move and take care of themselves. This is in contrast to "altricial" organisms, which are born relatively undeveloped and require a period of care and nurturing before they can move and feed independently. Semelparous and iteroparous refer to reproductive strategies and are not relevant to the question.

Question 11

In long-lived species of organisms,the primary advantage of delaying reproduction (late maturity)is

Accepted Answer

Delaying reproduction allows the organism to grow larger, which can lead to a larger initial body size during the first reproduction event, potentially increasing reproductive success.

Question 12

Parental care is best developed among

Accepted Answer

Ants and bees exhibit one of the highest levels of parental care among animals. Female ants and bees, also called queens, invest a lot of energy in producing and caring for their offspring. The queens lay many eggs, which they care for and protect until they hatch. Once the eggs hatch, the queen continues to care for the young, feeding and grooming them until they are ready to care for themselves. Workers in ant and bee colonies also provide care for the young, helping to feed and protect them. This type of parental care helps ensure the survival and success of the colony.

Question 13

Human reproductive systems are best described as

Accepted Answer

Human reproductive systems are dioecious, meaning that there are separate male and female reproductive systems.

Question 14

The mating system in which males and females mate with one or many of the opposite sex and form no pair bond is known as

Accepted Answer

The term promiscuity refers to the mating system in which males and females mate with one or many of the opposite sex and form no pair bond. Monogamy refers to a mating system where one male mates with one female exclusively, while polygyny refers to a situation where one male mates with multiple females. Polyandry, on the other hand, refers to a situation where one female mates with multiple males.

Question 15

Early sexual maturity is predicted to result in

Accepted Answer

Early sexual maturity results in higher reproduction earlier in life, but not necessarily higher overall lifetime reproduction. In fact, lower overall lifetime reproduction may occur due to decreased reproductive success in later life as a result of putting energy into reproduction at an earlier age.

Question 16

An animal with high fecundity is predicted to have

Accepted Answer

High fecundity typically means an animal produces a large number of offspring, which often correlates with lower investment in any single offspring, potentially leading to a lower survival rate among those offspring due to less parental care or resources per offspring.

Question 17

These data support the trade-off that

Accepted Answer

The data support a trade-off where larger offspring are produced in smaller numbers, and smaller offspring are produced in larger numbers. This suggests a correlation between the size of offspring and the number of offspring.

Question 18

When one male mates and stays with one female,the relationship is called

Accepted Answer

Monogamous refers to a relationship where one male mates and stays with one female. Polygamous refers to a relationship where one male mates with multiple females, and promiscuous refers to a relationship where there is no strong pair bond and individuals mate with multiple partners. Monoecious is a term used in botany to describe a plant that has both male and female reproductive organs.

Question 19

Altricial young are relatively

Accepted Answer

Altricial young are characterized by being helpless at birth and typically require less time for incubation and gestation compared to precocial species, which are more developed and independent at birth.

Question 20

Successful reproduction can result in a

Accepted Answer

Successful reproduction often requires significant energy and resources, which can lead to a lower chance of future reproduction due to the depletion of these resources.

Quiz 10: Life History