5. Two bodily structures, found in different species, have different internal bone structures but serve a similar purpose in each organism. BLS4.1

A-homologous structures
B-Vestigial structures
C-analogous structures
D-natural selection

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.

science-ocean floors and habitats study guide by volleyballqueen3817 a major advance in ocean-floor mapping. list four sections of the ocean floor. algae that use sunlight to produce their own food through photosynthesis. all of the feeding relationships that exist in a habitat. drying out, predators, find food.

i don’t no. suiopgohjk

any abiotic or biotic factor in an ecosystem that causes a population's size to slow or decrease is a limiting factor.