Which cell structures are present in mature sieve tube cells, but not in mature vessel elements? Select all that apply. smooth endoplasmic reticulum nucleus mitochondria cytoplasm cell wall

Deforestation occurs when a desert gets hotter than usual large areas of land are converted into cities a forest is cut down for logging or farming purposes a semi dry area becomes a desert

What coefficients must be placed in the following blanks so that all atoms are accounted for in the products? C6H12O6 - > C2H6O + CO2 a. 2; 1 c. 1; 3 b. 3; 1 d. 2; 2

What would happen if Earth had no atmosphere? A. The days would be hot and the nights would be cold. B. The days would be cold and the nights would be hot. C. Earth would not have days. D. Earth would not have nights.

A cell is arrested during mitosis. at this stage, distinct chromosomes are aligned along the center of the cell. which stage of mitosis does this describe?

Which of the following describes multicellular organisms having cells with very specific jobs, all working together for the organism to function. O cell specialization O stem cells O cell differentiation O cell structure

Which of the following is a prediction based on the cell theory that all organisms are made of cells, and all cells come from preexisting cells?1. If you boil nutrient broth and place it in an air-tight flask, cells will appear in the broth2.

During photosynthesis, the energy from sunlight is used to split water molecules. What happens to the hydrogen ions that are split from the water molecules?

Which part of a scientific argument must be supported by valid data

What is used as evidence for continental drift

Ocean floor rocks are. Continental rocks