Bot 331 stuvia Study guides, Class notes & Summaries

How were the first cells discovered? - Answer by Robert Hooke when making sections of cork and looking at them under a microscope Why are both the bristlecone pine and the quaking aspen considered the "longest living" plant? - Answer they are a "population" or single organism aspen - bc they propagate themselves by having new shoots coming up from the roots and the older part dies off, if you consider it one organism rather than a population What is Arabidopsis thaliana and what ar...

Which mutant has a greatly increased number of stem cells in the shoot apical mersistem? A mutant that has NO functional WUS. A mutant that has NO functional PIN protein. A mutant that has NO functional CLAVATA3. A mutant that has NO functional WOX5. - Answer A mutant that has NO functional CLAVATA3. Choose a tropism. State how the environmental cue is perceived AND explain how perception causes growth to be redirected towards or away from the cue. - Answer Phototropism occurs when a ...

State two ways a decrease in soil pH may cause mineral deficiency symptoms. A decrease in soil pH means an increase in proton (H+) concentration. An increase in soil H+ can result in cation exchange where H+ replace other cations, such as Ca2+, from the surface of negatively charged soil particles. The Ca2+ is then dissolved in water and can potentially leach out of the soil resulting in a calcium deficiency. The other way low pH could cause a mineral deficiency is that numerous minerals are...

Correct Answers There are two types of nucleic acids: DNA and RNA. There is both DNA and RNA inside the nucleus, mitochondria and plastids. Is there both DNA and RNA in the cytosol? Explain your answer - Answer No, not both. DNA remains in the nucleus. RNA copies of genes are synthesized in the nucleus, but then moved out pores into the cytosol, where ribosomes (also containing RNA) bind RNA and use the RNA to direct synthesis of proteins. In the case of plastids and mitochondria, RNA c...

Main components of plant structure - Answer Root and Shoot plasma membrane - Answer A selectively-permeable phospholipid bilayer forming the boundary of the cells Phospholipids - Answer a lipid consisting of a glycerol bound to two fatty acids and a phosphate group. integral proteins - Answer embedded in the membrane peripheral proteins - Answer bound to the surface of the membrane by ionic of h bond Anchored proteins - Answer bound to membrane via lipid molecule or fatty acid ...

Active transport is the reverse of transpiration. - Answer false If the concentration of solutes outside of a plant cell is greater than the concentration on the inside, water will - Answer move out of the cell Tension in the leaf xylem is due to the adhesive and cohesive properties of water as well as transpiration. - Answer true If a cell stockpiles a substance through the expenditure of energy, the process involved must be __________. - Answer active transport If imbibition was in...

List two essential mineral elements. For each, state a function and a deficiency symptom. -reduced growth, woody stems, and purple leaf pigment from anthocyanins. Another nutrient is phosphorus. Phosphorus deficiency causes reduced growth and slender stems, and dark green leaves with necrotic spots. A gardener observes symptoms on their tomato plants of chlorosis in between leaf veins on older leaves before younger leaves. The gardener and horticulture experts agree that the plant has a Magne...

True/false, if false explain why A protein that binds ATP and transfers a phosphate onto a substrate is called a Protein Phosphatase. - Answer False, a Protein Phosphatase removes phosphates from its substrate; a Protein Kinase transfers phosphates onto its substrate. True/false, if false explain why Indole-3-acetic acid is chemically derived from a nitrogenous base. - Answer False, indole-3-acetic acid, also called auxin, is chemically derived from tryptophan, which is an amino aicd not a ...

Because the oxygen atom is more ______ than hydrogen, it tends to attract the ekctrons of the covalent bond. - Answer Electromagnetic Electrostatic interactions between water molecules is known as ______ - Answer Hydrogen bond ______ ______ capacity is the heat energy required to raise the temperature of a substance by a given amount. - Answer Specific heat The energy needed to separate molecules from a liquid phase and move them into the gas phase. - Answer Latent heat of vaporization ...

Which two of the following will decrease the stream flow from a watershed? A. Higher average annual precipitation B. Higher average annual temperature C. Denser and more extensive forest covering the watershed D. A larger watershed area E. Higher humidity F. Lower average wind speed - Answer (B and C) T/F: Logging increases water yield from a watershed. - Answer T (true) The USGS reports the following flow data for lower Plateau Creek for December 6 based on 74 years of record. 25th...