Evidence for Behaviors/Traits Impacting Reproduction - Middle School Life Science

What is the key reproductive advantage of internal fertilization compared with external fertilization?

Higher fertilization success and better protection of gametes/embryos. Direct sperm transfer and protected development increase offspring survival.
Identify the best evidence that a courtship display improves reproduction.

Individuals using the display mate more often and produce more offspring. Links behavior directly to both mating success and offspring production.
What is parental care, and how does it relate to reproductive success?

Care for young; it increases offspring survival and future reproduction. Parents invest energy to help offspring survive to reproductive age.
Which option is the best evidence that a toxin in a frog protects offspring?

Predators avoid toxic frogs, and more of their young survive to adulthood. Shows toxin deters predators, directly improving offspring survival.
Which option is the best evidence that a mating display increases reproductive success: higher survival or more mates?

More mates (higher mating frequency or more offspring produced). Direct reproductive output shows immediate fitness benefits.
Which conclusion is supported if a fish fanning eggs increases hatching rate?

Egg fanning increases reproductive success by improving egg survival. Oxygen flow from fanning helps more eggs develop successfully.
What is territorial behavior, and what is its reproductive advantage?

Defending an area; it secures resources or mates and increases offspring. Controlling space ensures access to food and mates for breeding.
What is parental care, and how is it related to reproductive success?

Care for young; increases offspring survival and future reproduction. Investment in offspring increases their survival to reproductive age.
Which evidence best supports that nest building is adaptive: nests look nice or chicks survive more often in nests?

Chicks survive more often in nests. Survival data directly links behavior to reproductive fitness.
Identify the best claim: a longer tail is favored if males with longer tails leave more offspring. What process is this?

Sexual selection. Traits that increase offspring production spread through populations.
What is the main difference between natural selection and sexual selection?

Natural: survival traits; sexual: traits that increase mating success. Natural selection favors any helpful trait; sexual selection specifically for mating.
What is a structural adaptation related to reproduction?

A physical trait that increases chances of mating or offspring survival. Physical features evolved through natural or sexual selection for reproduction.
What is a mating call an example of, and what is its main reproductive function?

Behavioral adaptation; attracts mates and signals species identity. Sound signals prevent cross-species mating and increase mating success.
What is a mating call, and what is its main reproductive function?

A signal to attract mates or coordinate breeding at the right time. Sound signals help animals find mates when ready to breed.
Choose the best conclusion: birds that share incubation have more fledglings than birds that do not. What increases success?

Parental care (shared incubation). Behavioral cooperation increases offspring survival to fledging.
What is sexual selection?

Selection for traits that increase success in obtaining mates. Evolutionary process where mating advantages drive trait evolution.
Which conclusion is supported if a frog species calls only after rain and mates more?

Calling after rain improves mating success by timing reproduction to conditions. Synchronizes breeding with water availability for tadpole survival.
What is a structural adaptation (in the context of reproduction)?

A body feature that increases chances of mating, fertilization, or survival. Physical traits evolve to help organisms reproduce more effectively.
What is courtship behavior?

A set of behaviors used to attract and choose a mate. Species-specific behaviors ensure successful mating with compatible partners.
Identify the best inference if birds with stronger beaks crack more seeds and raise more chicks.

Stronger beaks increase offspring survival by improving feeding success. Better feeding ability means parents can nourish more young.
Identify the best evidence that a warning coloration affects reproduction rather than feeding.

Individuals with warning colors survive to reproduce more often. Survival to breeding age shows reproductive benefit of the trait.
What is a behavioral adaptation (in the context of reproduction)?

An action pattern that increases chances of mating or offspring survival. Behaviors evolve when they help organisms mate or raise young successfully.
Which type of evidence best supports that a trait increases reproductive success?

Higher number of surviving offspring in individuals with the trait. Direct measurement of offspring survival shows evolutionary advantage.
Which option best links structure to reproduction: thicker fur helps warmth or specialized pollen structures aid pollination?

Specialized pollen structures aid pollination. Pollen transfer directly enables plant reproduction.
Identify the most direct measure of reproductive success in a study of frogs over one breeding season.

Number of offspring produced that survive to the next life stage. Counts offspring reaching independence, the ultimate fitness measure.
What is camouflage in eggs or nests, and how can it affect reproduction?

Concealment; it reduces predation and increases offspring survival. Hidden eggs/nests are harder for predators to find and destroy.
What is reproductive success in biology?

Number of viable offspring an organism produces that survive to reproduce. Measures evolutionary fitness through offspring that reach breeding age.
Which conclusion is supported if a nest-guarding bird loses fewer chicks?

Nest guarding increases reproductive success by increasing chick survival. Protection behavior directly increases offspring survival rate.
What is camouflage in a nesting animal most likely to increase?

Offspring survival by reducing detection by predators. Cryptic coloration protects vulnerable offspring from predation.
Which option is the strongest evidence that a mating call is species-specific: predators react or only same species respond?

Only individuals of the same species respond. Species-specific response prevents hybridization and wasted mating efforts.
What is a common reproductive advantage of bright plumage in some male birds?

Increases mate attraction, raising mating success. Sexual selection favors conspicuous traits despite survival costs.
Which option best supports that egg shells increase reproductive success: eggs are heavier or eggs lose less water and hatch more?

Eggs lose less water and hatch more often. Reduced desiccation and higher hatching rates show reproductive benefit.
Identify the best claim if flowers with brighter petals get more pollinator visits.

Brighter petals increase pollination and seed production. More visits mean more pollen transfer, creating more seeds.
What is a behavioral adaptation related to reproduction?

An inherited behavior that increases chances of producing offspring. Natural selection favors behaviors that enhance mating or offspring survival.
Which conclusion is supported if males with longer tails have more offspring?

Longer tails increase mating success and thus reproductive success. More offspring shows the trait helps males attract females.
What is a trade-off in reproductive traits?

A trait increases reproduction but decreases survival or uses extra energy. Organisms balance costs and benefits when evolving reproductive strategies.

Study these flashcards