Which weathering process involves physical forces but not chemical reactions or dissolving of minerals a. solution b. abrasion c. hydration d. carbonation

In a lab, scientists grew several generations of offspring of a plant using the method shown. what conclusion can you make about the offspring? a. they formed from meiosis and mitosis. b. they have half the number of chromosomes as their parent. c. they have low genetic variability among them. d. they will be able to reproduce only after they grow flowers.

Is becoming less expensive to screen blood samples for dna certain diseases have genetic basis what is possible ethical concern about the availability of inexpensive dna testing

Modern sea star larvae resemble some primitive vertebrate larvae. this similarity may suggest that primitive vertebrates