Which of the following are threats to the biodiversity of invertebrates?

A) habitat destruction only
B) non-native (invasive) species only
C) habitat degradation only
D) habitat destruction, non-native (invasive) species, habitat degradation


Answer: D

Biology & Microbiology

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A geneticist examines a somatic cell from a fly during metaphase of mitosis and determines that 16 chromatids are present.  If a germ-line cell from this species divides by meiosis, then at the end of meiosis I (including the first cytokinesis) each cell will contain  

A.  8 chromosomes with 8 DNA molecules. B.  8 chromosomes with 16 DNA molecules. C.  4 chromosomes with 4 DNA molecules. D.  4 chromosomes with 8 DNA molecules. Clarify Question  · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean?   Gather Content   · What do you know about meiosis? How does it relate to the question? Consider Possibilities   · What other information is related to the question? Which information is most useful?   Choose Answer   · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?     Reflect on Process   · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Biology & Microbiology

Which classification is the best description of humans?

a. herbivore b. carnivore c. omnivore d. decomposer e. photosynthetic organism

Biology & Microbiology

The stimulation of a motor neuron ultimately results in the release of a neurotransmitter at the synapse between the neuron and a muscle cell. How is the chemical signal converted into an electrical signal in the postsynaptic muscle cell?

What will be an ideal response?

Biology & Microbiology

Mechanical removal of most microbes from living or inanimate surfaces

A. Sterilization B. Disinfection C. Decontamination D. Antisepsis

Biology & Microbiology