Insects and other arthropods have a _____

1.Endoskeleton
2.Exoskeleton
3.Ectoskeleton
4.Hydrostatic skeleton
5.Proteinacious skeleton


2

Biology & Microbiology

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The most abundant group of seedless tracheophyte plants are the 

A. club mosses. B. horse tails. C. angiosperms. D. ferns. E. gymnosperms.

Biology & Microbiology

Which type of chromosomal change occurs when a chromosome breaks and the broken part attaches to a different chromosome?

a. Inversion b. Duplication c. Translocation d. Deletion e. None of these choices.

Biology & Microbiology

In the Gram-staining procedure, the mordant is

A. crystal violet. B. alcohol. C. safranin. D. iodine.

Biology & Microbiology

Hydrostatic pressure in plant cells that presses the plasma membrane firmly against the interior of the cell wall, making it rigid is.

What will be an ideal response?

Biology & Microbiology