Which species often exhibit a type one survivorship curve?

Which species often exhibit a type one survivorship curve?

• A. Bacteria
• B. Humans and elephants
• C. Frogs and toads
• D. Insects

Answer: (B)

A type one survivorship curve is characterized by high survivorship rates throughout most of the life span of the organism, with most individuals living to old age, followed by a significant drop in population at older ages. This pattern is typically observed in species that produce few offspring but invest a great deal of parental care into raising them, ensuring their survival through early life stages. Humans and elephants exemplify this type of survivorship curve. Both species tend to have fewer offspring, and extensive care and nurturing are provided to ensure that the young have a higher chance of survival. This contrasts with other species like bacteria, frogs, toads, and insects, which often exhibit different survivorship patterns, such as type two or type three curves, where survivorship varies more widely with age or where many offspring are produced with minimal care.

A type one survivorship curve is characterized by high survivorship rates throughout most of the life span of the organism, with most individuals living to old age, followed by a significant drop in population at older ages. This pattern is typically observed in species that produce few offspring but invest a great deal of parental care into raising them, ensuring their survival through early life stages.

Humans and elephants exemplify this type of survivorship curve. Both species tend to have fewer offspring, and extensive care and nurturing are provided to ensure that the young have a higher chance of survival. This contrasts with other species like bacteria, frogs, toads, and insects, which often exhibit different survivorship patterns, such as type two or type three curves, where survivorship varies more widely with age or where many offspring are produced with minimal care.