You are working with a research group and discover fossils of large animal. Upon close examination, it looks to be a mammal and an ancestor to the modern tiger, that you temporarily name “Species X’until you learn more about it. Using
your knowledge of the fossil record, you attempt to determine its relative age. You know that
evolved before
species X,
had already evolved and gone extinct before species X evolved, and
did not evolve
until after species X went extinct.
. A. Winged insects, Dinosaurs, Humans
B. Trilobites, Reptiles, Birds
C. Humans, Dinosaurs, Flowering plants
.
.
D. Dinosaurs, Invertebrates, Land plants

What is it called when plants lose water though their leaves

What causes an unsaturated fatty acid to have a different shape than a saturated fatty acid? o a. unsaturated fatty acids have more hydrogen atoms. o b. unsaturated fatty acids have double carbon bonds. o c. unsaturated fatty acids have more nitrogen atoms. o d. unsaturated fatty acids have single carbon bonds.

With the description of the different cell walls, membranes, and associated proteins set in the students' minds, you now need to introduce them to the idea that the cell wall can also act as a foundation to build things upon. bacterial appendages require a strong foundation that will offer the support needed to move and function in a dynamic world. for example, flagella are long, whiplike protein structures that are used by many gram-positive and gram-negative bacteria for locomotion. in order to function effectively, a flagellum must be firmly anchored to the cell wall. how will you be able to get across the idea that the peptidoglycan cell wall is strong enough to support such a mechanism? with a protein rod that passes through the cell wall and protein rings used to anchor it in the membranes, these basal bodies are the rudimentary biological motors that use atp power to spin the hook and the flagella attached to it. bacterial flagella have a biological motor that spins within the cell wall and is powered by atp. this allows the flagella to spin in a whiplike motion to propel the bacterium.