Icon Buscar juegos
Icon Crear Crear

ES Age Structure and Sex Ratios pp 108-109

Completar frases

pages 108 and 109 of the textbook
Editar icon Duplicar
Crear reto icon Crear reto
Sobre Completar frases
environmental science
es
ch 04
30 veces realizada

Creada por

rpedelty
rpedelty
Estados Unidos
Crea tu propio juego gratis desde nuestro creador de juegos
Crear completar frases
Compite contra tus amigos para ver quien consigue la mejor puntuación en esta actividad
Crear reto

Top juegos

  1. tiempo
    puntuacion
  1. tiempo
    puntuacion
tiempo
puntuacion
tiempo
puntuacion
Has superado el número máximo de juegos que puedes imprimir con tu Plan actual.
Para imprimir tantos juegos como quieras, necesitas un Plan Académico o un Plan Comercial.
Obtener Plan Académico

Imprime tu juego

game-icon

Completar

ES Age Structure and Sex Ratios pp 108-109

pages 108 and 109 of the textbook

rpedelty
1

older post growth decline numbers reproductive distribution stable males single group ratio females increase pre age rapid frequencies unbalanced ages quickly

Different populations have different mixes of ages . Likewise , populations can vary in the proportion of and present . These differences can affect how a population grows .

Populations almost always include individuals of different .

Age structure , or age , describes the relative numbers of organisms of each age within a population .

Age pyramids , or age structure diagrams , are visual tools scientists use to show the age structure of populations . The width of each horizontal bar in the diagram represents the relative size of each .

Individuals capable of having offspring make up the group .

Young individuals who have not yet reached the age where they can have offspring are called - reproductive .

Older individuals past the age of having offspring are called - reproductive .

Age structure diagrams can be effective tools when predicting population .

A population with an even age distribution will likely remain as births keep pace with deaths .

A population made up mostly of individuals past reproductive age will tend to over time .

In contrast , a population of mostly reproductive or pre - reproductive individuals is likely to over time .

Populations that are " bottom heavy " are capable of growth . In this respect , the wide base of an age pyramid is like an oversized engine in a sports car - the bigger the engine , the faster it accelerates .

A population's age structure diagram shows relative of males and females in different age groups .

Populations with more young , prereproductive individuals tend to grow .
Populations with more , post - reproductive individuals tend to decline .

A population's sex is its proportion of males to females .

Age structure diagrams also give information about sex ratio by providing the relative of males and females in each age group .

Sex ratio is an important characteristic for populations of organisms that reproduce sexually and have distinct male and female individuals . For example , in monogamous species ( in which each sex takes a mate ) , a 50 : 50 sex ratio is often ideal .

If there are too many males or females , called an sex ratio , many individuals would be left without a mate - making it much harder for any given individual to reproduce and pass on genes .

Imprimir PDF