A group of somatic stem cells lie along the basement membrane of the respiratory epithelium and give rise to both ciliated pseudostratified columnar cells and goblet cells (mucus-producing cells). this is an example of replacement of tissues by:

Which of the following provides evidence to support the theory of seafloor spreading? A. Fossils of same plants and animals found in different seas B. Continents look like puzzle pieces that can be fit into one another C.

A plant grower has a greenhouse where she grows plants in the winter. The greenhouse is exposed to direct sunlight and often gets too hot for the plants.

Which statement correctly describes diffrences between meiosis I and meiosis II? A) meiosis I brings together sister chromatids and meiosis II seperates them B) Meiosis I seperates tetrads and meiosis II seperates sister chromatids C) Meiosis I

Decomposers tend to go about their business without being noticed or rewarded for the work they do. Explain the importance of decomposers in ecosystems. Include in your answer the role that mold plays in a forest.

How are vacuoles like storage bins?

Explain how energy flows in a food chain. DONE

A friend tells you he read somewhere that rotting garbage can turn into maggots, which are fly larvae, and the maggots then can grow into adult flies. What part of the cell theory could you use to refute his claim?

Which of these is a characteristic of climate? A. Changes weekly B. Changes every day C. Reported as a daily forecast D. Reported as a pattern over time

Genetic disorders can result when sister chromatids fail to separate properly. During which phase is this problem most likely to occur? A: g1 phase B:g0 phase C: Cytokinesis D:Mitosis

4. Which change describes a demographic transition? a. a population moves from a high birthrate and death rate to a high birthrate and low death rate b. a population moves from a high birthrate and low death rate to a low birthrate and death rate c.