How does the structure of the cell membrane contribute to the overall function of the cell? It provides rigid support and structure for the entire organism.
It contains small openings that can store water the cell needs to survive.
It carries signals from one cell to the next, allowing cells to work together.
It allows for the passage of certain substances into and out of the cell.

In a classic experiment using pea shape, mendel conducted two separate genetic crosses. in the first cross the parent plants were “true breeding” for pea shape; one had round peas ( r )and the other had wrinkled (r). the first cross produced a filial 1 generation of all round peas. in the second cross, mendel bred plants from the filial 1 generation. this cross produced different results. out of approximately 1000 plants, about 75% were round and 25% were wrinkled.

The breakdown of food is accomplished by enzymes. a. physical b. chemical c. mechanical d. none of the above

Which of the following happened during the precambrian era? the first prokaryotic cells the first eukaryotic cells development of photosynthesis all of the above