Question

traits, variation, adaptation-let us dig deeper
directions: pick 2 sets of animal pairs and provide the following:
a. picture of each animal or plant
b. determine if they are related to a common ancestor.
c. determine if they are closely related through variation of traits or adaptation of traits.
d. provide an example of each difference.

animal/plant one\tanimal/plant two
golden eagle\tbald eagle
llama\talpaca
one hump camel\ttwo hump camel
texas wild hog\tafrican warthog
venus flytrap plant\tpitcher plant

Explanation:

Pair 1: Golden Eagle & Bald Eagle

A. (Visual) Both are large birds with hooked beaks, broad wings, dark brown body plumage (bald eagle has white head/tail as adult).
B. They share a common avian ancestor in the Accipitridae family.
C. They are closely related (same family, different genera); variation: bald eagles have white head/tail (adult) for mating display, golden eagles have all-brown plumage for camouflage in mountain habitats.
D. Trait variation: Bald eagle's white head (sexual selection adaptation) vs golden eagle's uniform brown (camouflage adaptation).

Pair 2: Llama & Alpaca

A. (Visual) Both are woolly, hoofed South American camelids with similar body shapes, short tails, and upright ears.
B. They share a common ancestor, the extinct Hemiauchenia, and are closely related camelids.
C. They are very closely related (same tribe, Lamini); variation: llamas are larger (used as pack animals) while alpacas are smaller (bred for fine wool).
D. Trait adaptation: Llama's larger body size (adaptation for carrying heavy loads in mountain terrain) vs alpaca's dense, fine wool (adaptation to cold Andean climates for insulation).

Answer:

Pair 1: Golden Eagle & Bald Eagle

A. Golden Eagle: Large bird, dark brown plumage, golden-brown nape; Bald Eagle: Large bird, dark brown body, white head/tail (adult)
B. Yes, shared common Accipitridae ancestor
C. Closely related (same family); variation via plumage and habitat traits
D. Adaptation example: Bald eagle's white head (sexual signaling); Golden eagle's all-brown plumage (camouflage for mountain hunting)

Pair 2: Llama & Alpaca

A. Llama: Large, sturdy woolly camelid; Alpaca: Smaller, compact woolly camelid
B. Yes, shared extinct Hemiauchenia ancestor
C. Very closely related (same tribe); variation via size and wool type
D. Adaptation example: Llama's large size (pack animal adaptation); Alpaca's dense fine wool (cold climate insulation adaptation)