Commercial inorganic fertilizers have greatly increased agricultural productivity. What is an advantage of using inorganic rather than organic fertilizers?
A) It is easier for plants to absorb nutrients in an inorganic form.
B) Nutrients are released faster from inorganic fertilizers.
C) Inorganic nutrients bind more tightly to soil particles.
D) Inorganic fertilizers increase the water-holding capacity of the soil.
Answer: B
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All of the following are model organisms, except
A) Saccharomyces cerevisiae. B) Drosophila melanogaster. C) Caenorhabditis elegans. D) Arabidopsis thialana. E) Homo sapiens.
Answer the following statements true (T) or false (F)
1) Cytokinesis in plant cells occurs by means of a cleavage furrow. 2) DNA replication occurs in mitosis. 3) Mitosis and cytoplasmic division result in the formation of two genetically identical cells. 4) Germ-line cells are haploid but gametes are diploid. 5) At the end of meiosis I, each daughter cell contains the sister chromatids from only one chromosome from each chromosomal pair. 6) XY individual with a loss-of-function mutation in the SRY gene is expected to be female.
What type of an extracellular matrix does blood have?
a. gel-like b. matrix hardened by calcium and phosphorus c. fluid d. glycoprotein rich e. tightly packed with fibres
The reason that the various Hawaiian
honeycreepers are vulnerable to extinction is a. the reduction of their habitats. b. the warming of their habitats, supporting mosquitoes that carry the pathogens for avian malaria. c. the encroachment of humans into their habitats. d. the importation of new predators and competitors into their habitats. e. all of these answers