How is the trachea like xylem?
a. Both conduct fluids
b. Both are structurally reinforced to withstand negative pressure
c. Both are composed of cells with strong cell walls
d. Both provide structural support to the organism
Answer: b. Both are structurally reinforced to withstand negative pressure
You might also like to view...
The phylogenetic distribution of the enzyme rubisco is limited to _____
A) only C3 plants B) C3 and C4 plants C) photosynthetic eukaryotes D) bacterial and eukaryotic photoautotrophs E) all living cells
Which hormone is made by neurosecretory cells in the hypothalamus?
a. antidiuretic hormone (ADH) b. thyroid-stimulating hormone (TSH) c. follicle-stimulating hormone (FSH) d. melatonin e. adrenocorticotropic hormone (ACTH)
To make a transgenic Huntington Disease mouse, a copy of the mutant human HD gene was cloned into a vector, and the next step was to _____
1.transfer the vector directly into the foster mother mouse 2.microinject the vector into the nucleus of a fertilized mouse egg 3.transform bacteria using the engineered plasmid 4.insert the sequence into the genome of a virus and infect a mouse with the virus
Which of the following is the strongest
evidence for the idea that present-day eukaryotic aerobes are the descendants of the successful symbiotic association of anaerobes and aerobes? a. Mitochondria can produce ATP. b. A mitochondrion can survive indefinitely when removed from a eukaryotic cell. c. A mitochondrion has its own set of DNA molecules. d. Fossilized mitochondria are older than the oldest fossilized eukaryotes. e. All eukaryotic cells have mitochondria