What is the source of energy in most ecosystems

Which statement is true for chordate nerve cord a. It is dorsal and hollow. b. It is ventral and hollow. c. It is dorsal and solid.

Which events can cause an ecological disturbance? Select the three correct answers. A. The introduction of a new species B. Climate change C. Late spring snowstorms D. An average rainfall E. Native predator-prey interactions

Do all vertebrates have ear-like structures to hear

When the exponential phase of a logistic growth curve of the population ceases A. the size of the population drops B. the size of the population stays the same C. population growth begins to slow down D. population growth begins to speed up

A nucleotide is about to be added to a growing strand of DNA. Which factor determines which type of nucleotide will be added? A. Base-pairing rules B. The type of cell in which replication is taking place C. The length of the DNA strand D.

When the reuptake of dopamine is blocked by the ritalin or cocaine molecule, what would happen?

Genetic material is being duplicated during which phase of the cell cycle? A. D phase B. M phase C. interphase D. G0 phase

Choose the correct process for the description given: does not require light

Samuel visited an ecosystem. he found that the weather is very hot and dry, the entire land is surrounded by sand, and the plants that have thorns with fleshy leaves. which ecosystem did samuel visit? a. tropical rainforest biome b. desert biome c.

Visit the website below and use the information to answer the following question. Ecological Succession: Transformation of Communities over Time Why does secondary succession occur faster than primary succession?