What rigid structure surrounds a plant cell membrane and provides support to the cell?

Assume that an organism exists in which crossing over does not occur, but that all other processes associated with meiosis occur normally. Consider how the absence of crossing over would affect the outcome of meiosis.

A male bird shows bright feathers to attract a mate. What type of behavior is this? territorial behavior simulation courtship behavior learned behavior

5. A change in an organism's environment that causes the organism to react is called a (n)

What would happen if the cell went through mitosis but not cytokinesis

Trees, walls, and fence post leaning downhill are signs of? A rockfalls B mud flow C Creep D slump?

What is the role of phospholipids and proteins in controlling the passage of substances across the cell surface membrane, making reference to its partially permeable nature.

Which statement represent an abiotic environmental factor in an ecosystem? *The flower bud every spring. *The fish swim up the river to reproduce. *The fox eats meats in the meadow. The lake bottom is lined with rocks,

Which of these has NOT provided evidence showing that the continents have drifted over time? O A) rocks OB) fossils OC) earthquakes OD) geologic structures

All organic molecules contain the element carbon.

Which cell part contains directions for cell growth and reproduction? A. cell wall B. plasma membrane C. nucleus D. pores