sulfur cycle

What will be an ideal response?


Sulfur dioxide from the atmosphere becomes available to terrestrial and marine ecosystems when it is dissolved in precipitation as weak sulfuric acid or when it falls directly to Earth as fallout. Weathering of rocks also makes sulfates available to terrestrial ecosystems. Decomposition of living organisms returns sulfates to the ocean, soil, and atmosphere.

Biology & Microbiology

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A lac Y- mutant would

A) be constitutive. B) no longer be induced by the presence of lactose. C) not have ?-galatosidase activity. D) transport lactose into the cell effectively. E) metabolize lactose.

Biology & Microbiology

In eukaryotes, precursor mRNA molecules are processed in the

A) ribosomes. B) nucleus. C) mitochondria. D) cytoplasm. E) nucleolus.

Biology & Microbiology

Why is smoking cigarettes so dangerous to human health?

What will be an ideal response?

Biology & Microbiology

In the ABC model of flower development in Arabidopsis thaliana, sepals form when which gene(s) is/are switched on?

A. A only B. A and B C. B and C D. C only E. A and B and C

Biology & Microbiology