Unlike animal cells, plant cells have cell walls that make them rigid. Which organelle, other than the cell wall, also plays a vital role in providing rigidity to plant cells? A) Nucleus B) Chloroplast C) Central vacuole D) Endoplasmic reticulum

The human disease filariasis is caused by worms from which phylum? nematoda platyhelminthes annelida cnidaria mollusca

Scientific questions can be asked based on which of the following?

How does the sun affect thunderstorms.

The basic unit of structure and function in the nervous system is the neuron. a. true b. false 17 Answer: The endocrine system produces chemical messengers called enzymes. a. true b.

Match the statement with the correct term. When a characteristic is subject to a range in severity or degree of expression in the phenotype. When individuals have a genotype that specifies a particular phenotype but that phenotype does not develop.

Which of these groups of animals are endargered a. mice b. killer whales c. dinosaurs d. sea turtles

Levels of organization of the biosphere

From where dothe kenetic tiles collect energy

Landscapes will undergo the most chemical weathering if the climate is * A) cool and wet B) warm and wet C) cool and dry D) warm and dry

Why are sharks so successful at what they do?