Compare and contrast the frog's external anatomy with that of a mammal. State design advantages is has for its lifestyle.

Explanation:

Frogs do not have outer ear which mammals have.

Frog is an amphibian

Integumentary system to protect skin from external environment., mammals have glandular skin.

skin to inhabit water habitat skin has glands, hair, mammary gland and fur

Frogs have two forelimbs and two hind limbs. mammals have 4 forelimbs.

presence of cloaca for waste, sperm and egg release while mammals have anus, urethra and genital openings for the purpose.

ADVANTAGES OF EXTERNAL FEATURES IN LIFESTYLE:

The frogs body id designed streamlined for swimming as presence of flat skull, no neck and small waist.

The skin allows exchange of gases and allows them to breathe through skin.

Powerful hind legs assist them in jumps.

they have 3 eyelid membrane that helps them see in water or land.

answer : haversian

[explanation: -(compact bone is organized as parallel columns, known as haversian systems, which run lengthwise down the axis of long bones. these columns are composed of lamellae, concentric rings of bone, surrounding a central channel, or haversian canal, that contains the nerves, blood vessels, and lymphatic system of the bone)]