Archaeopteris, the first known tree, had what characteristics?
_____ It occurred in forests.
_____ It possessed wood.
_____ It reproduced by seeds.
_____ It had a eustele.
_____ It had a vascular cambium.
__X__ It occurred in forests.
__X__ It possessed wood.
_____ It reproduced by seeds.
__X__ It had a eustele.
__X__ It had a vascular cambium.
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One type of bacteria, called gram-negative bacteria, has a pyrogen molecule that is part of its membrane structure. This endogenous pyrogen is released when the cell is destroyed by the immune system
Why would a severe gram-negative bacterial infection be particularly dangerous to a patient?
An individual with the blood group genotype LMLN has the phenotype MN. What is the relationship between the LM and LN alleles?
A) codominance B) pleiotropy C) LN is dominant D) incomplete dominance
The ECM and basement membrane has to be broken down in order metastasis to occur?
a. true b. false
In the placenta, nutrients move from mother to baby by ____.
A. activated transport B. the Rh factor C. transport proteins D. simple diffusion E. HCG