A researcher discovers a new, single-celled bacterium very similar to Thiomargarita namibiensis. At first he is confused because this organism is quite large compared to other bacteria
He also knows that because of diffusion, most bacterial cells don't exceed 1m in
size. What might the researcher notice about the internal structure of his new bacterium?
(Select all correct choices.)
A. It contains several membrane-bound
organelles, facilitating the diffusion of
molecules.
B. It contains several large histones,
facilitating the diffusion of molecules.
C. It is completely filled by cytoplasm, limiting
the distance molecules need to diffuse.
D. It contains a large vacuole, limiting the
distance molecules need to diffuse.
D
You might also like to view...
Amino acid variability is especially apparent in several ________ in the V domains of different immunoglobulins
A) heavy chains B) complementarity-determining regions (CDR) C) peptide motifs D) epitopes
A population age structure diagram depicting an equal number of individuals in each age group suggests that the population is
A. stable. B. growing. C. declining. D. facing extinction. E. very small.
Nutrients and antibodies move across the placenta from mother to embryo or fetus, as do __________, which can cause birth defects.
Fill in the blank(s) with the appropriate word(s).
The aspect of conservation ecology concerned with returning degraded ecosystems (as nearly as possible) to their natural state is
A) bioremediation. B) sustainable development. C) restoration ecology. D) landscape ecology.