Answer the following statements true (T) or false (F)
1. The fins of lobe-finned fish are supported by extensions of the skeleton and are moved by muscles within the fin whereas the fins of ray-finned fish are supported by flexible, nonskeletal elements and are moved by muscles from within the fish's body.
2. Acanthostega is an important fossil for the understanding of phylogeny because it is an intermediate form between lobe-finned fishes and amphibians.
3. The formation of feathers, hair, and reptilian scales is based on completely different developmental patterns and genetic influences.
4. Some dinosaurs had feathers.
5. In previous times, birds and pterosaurs were contemporaries.
1. TRUE
2. TRUE
3. FALSE
4. TRUE
5. TRUE
You might also like to view...
If all variation among individuals in a population is due to differing environments, heritability is ____, and the slope of the line used to measure it is ____
A. 100%; 0.5 B. 100%; 1 C. 50%; 0.5 D. 50%; 1 E. 0; 0
A blocked coronary sinus would block blood flow:a
into the superior vena cava. b. into the inferior vena cava. c. into the pulmonary arteries. d. returning from the pulmonary arteries. e. returning from the coronary circulation
FSH stimulates interstitial cells in the testes to produce testosterone
Indicate whether the statement is true or false
System of membranous saccules and channels in the cytoplasm, often with attached ribosomes.
What will be an ideal response?