Nutrient poor soils and dominant evergreen

angiosperm trees dominate this biome.



a. boreal forests
b. chaparral
c. deserts
d. tropical rain forests
e. temperate deciduous forests


D

Biology & Microbiology

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Plants that have leaves arranged in a rosette

A) Have a circular arrangement of leaves and long internodes B) Are low growing because they have no stems whatsoever C) have greatly shortened internodes D) always have compound leaves

Biology & Microbiology

Which of the following best describes the double-helix of DNA?

A. It has directionality B. The strands are arranged in an anti-parallel arrangement C. The strands are complementary D. All of the answers are correct

Biology & Microbiology

Most protein synthesis happens on the surface of the ___________

A. rough endoplasmic reticulum D. mitochondrion B. smooth endoplasmic reticulum E. nucleus C. Golgi complex

Biology & Microbiology

For each of the following sentences, fill in the blanks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once

Cells signal to one another in various ways. Some use extracellular signal molecules that are dissolved gases, such as __________________, which can diffuse easily into cells. Others use cytokines, which bind to cytokine receptors. Cytokine receptors have no intrinsic enzyme activity but are associated with cytoplasmic tyrosine kinases called __________________s, which become activated on the binding of cytokine to its receptor and go on to phosphorylate and activate cytoplasmic transcriptional regulators called __________________s. Some intracellular signaling pathways involve chains of protein kinases that phosphorylate each other, as seen in the __________________ signaling module. Lipids can also relay signals in the cell, as we observe when phospholipase C cleaves the sugar-phosphate head off a lipid molecule to generate the two small messenger molecules __________________ (which remains embedded in the plasma membrane) and __________________ (which diffuses into the cytosol). cyclic GMP MAP kinase STAT diacylglycerol NO TGF? IP3 Ras JAK SMAD Fill in the blank(s) with correct word

Biology & Microbiology