Do protists have cell walls ... if so what is it made of

Which statement best summarizes the water cycle? As water moves through an ecosystem, its energy is lost between the trophic levels. Water in the atmosphere must be converted to another chemical before animals can use it.

A stem and leaf plot can only have one stem and one set of leaves. True of false

Which one of the following is NOT a characteristic of the carrying capacity? O The carrying capacity changes as the environment changes. The carrying capacity is the number of individuals the environment can support. 0.

6 What is the main reason that viruses are not considered to be living organisms? A They are too small to be living. B They do not have DNA. C They need the host cell to replicate, D They kill the host cells.

Which of the following is a scientific question about lavender plants? A does lavender honey smell better than honey made from clover B should lavender be planted along highway to add color and fragrance C is lavender easy to grow in garden?

Why do municipal water treatment plants not use distillation?

How does a kangaroo take care of three babies with only one pouch?

Using the defects method, which of these relationships represents the Law of Cosines if the measure of the included angle between the sides a and b of ∆ABC is more than 90°? a.

How is carbon exchanged between the geosphere and biosphere to maintain life?

The cholera bacterium Vibrio cholerae produces an enzyme toxin that chemically modifies a G protein involved in regulating salt and water secretion in intestinal cells.