Answer:
The fossil record matches the geologic record:
geographic distribution
The oldest forms of life were much more simple than the newest forms of life:
increasing complexity
A fossil called Tiktaalik has been found to be halfway between a fish and the earliest land animals:
transitional forms
Explanation:
i just did it and got it right
Explanation:
Cell culture is the process by which cells, whether prokaryotic or eukaryotic cells, can be grown under controlled conditions. In practice, the term "cell culture" is normally used in reference to the culture of cells isolated from multicellular eukaryotes, especially animal cells. The historical and methodological development of cell culture is intimately linked to the cultivar peptides of tissue culture and organ culture.
Animal cell culture began to be a routine laboratory technique during the 50,1 years but the concept of keeping living cell lines separate from the tissue of origin was discovered in the 19th century.
Answer:
SA node
Explanation:
The SA node (called the pacemaker of the heart) sends out an electrical impulse. The upper heart chambers (atria) contract. The AV node sends an impulse into the ventricles. The lower heart chambers (ventricles) contract or pump.
The water from a trough and the temperature outside would be abiotic factors. the grass it grazes on or a cowbird picking bugs off of it would be biotic factors (for future reference, abiotic factors are caused by nonliving things, and biotic factors are caused by other organisms)