Hepatitis B can be spread by what
What will be an ideal response?
blood transfusions, sexual contact, contaminated needles
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The core promoter is usually located
FtsZ, MreB, and CreS proteins regulate the shape and structure of bacterial (prokaryotes) cells. These proteins are homologous to what structure in eukaryotes?
A. extracellular matrix B. DNA processing enzymes C. cytoskeleton D. organelles E. cell wall
The following sequence of organisms is not an accurate representation of a community in that frogs could actually feed upon insects or spiders, fish could feed on either frogs or insects, and humans enjoy fish, frogs, tree products, and, in some cases, even insects. A more complete representation of these interactions would be a(n) trees ® insects ® spiders ® frogs ® fish ® human
A. energy pyramid.
B. food chain.
C. biome schematic.
D. food web.
Ultimate control of testes development is by the ________ which secretes ________.
A. anterior pituitary; testosterone B. hypothalamus; gonadotropin-releasing hormone C. anterior pituitary; gonadotropin-releasing hormone D. seminiferous tubules; inhibin E. hypothalamus; testosterone