Which of the following are fossil plants? a. pterosaurs and plesiosaurs b. trilobites and eurypterids c. graptolites and archaeocyathids d. gymnosperms and angiosperms

The correct option is d)  gymnosperms and angiosperms

Explanation:

Gymnosperms can be described as plant species which do not produce flowers. These plant species produce cone and seeds instead of flowers.

Angiosperms can be described as the plants which produce flowers. These plant type comprises of eggs which when fertilized develop into seeds. Angiosperms are also known as flowering plants.

not sure if this is what you'r looking for eubacteria and archaebacteria

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u