What is one difference between a cell wall and a cell membrane? a)cell walls do not connect cell to cell. cell membranes connect cell to cell. b)cell walls contain vesicles. cell membranes contain plasmids. c)only plant cells have cell walls. only animal cells have cell membranes. d)the cell wall is a rigid structure. the cell membrane is flexible.

Football players often sustain lateral blows to the extended knee. which of the ligaments is (are) damaged as a result? a. suprapatellar b. oblique popliteal and extracapsular ligament c. medial collateral, medial meniscus, and anterior cruciate d. arcuate popliteal and the posterior cruciate

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

What are 3 reasons that natural selection occurs