What are three anatomical features that birds share with their theropod ancestors

Three anatomical features that birds share with their theropod ancestors are:
1. they had light, hollow bones
2. they rearranged hip and leg muscles because this of improved bipedal movement
3. they had their flight oriented with the use of wings for balance

The answer is telescope.

An autotrophic protist - they can perform photosynthesis and mainly consist of unicellular algae. they can be divided into number of systematic group according to the shape of their cell and the type of photosynthetic pigments they use.