What is the apical meristem?
a. mitotically active tip of the root or shoot
b. midvein of a leaf through which wastes and nutrients circulate
c. mitotically inactive base of the root
d. fibrous bract that protects the outside of a bud before flowering
a. mitotically active tip of the root or shoot
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Rank the elements carbon, phosphorus, calcium, and iodine in order of decreasing number of energy shells/levels
A. CPCaI B. ICaPC C. IPCCa
Male-pattern baldness is only an autosomal dominant trait in humans
Indicate whether the statement is true or false
Adaptations
a. are characteristics that arise during an organism's lifetime and that help an organism survive longer or reproduce more. b. occur primarily in the form of useful molecules. c. are characteristics that arise via natural selection and that help an organism survive longer or reproduce more. d. are characteristics that mainly enhance feeding. e. are characteristics that arise during an organism's lifetime and that help an organism survive longer or reproduce more and are characteristics that arise via natural selection and that help an organism survive longer or reproduce more.
What happens when diffusion moves molecules across the plasma membrane?
A) The process is relatively slow and is driven by concentration gradients. B) Most molecules are capable of crossing the phospholipid bilayer at any location and at basically the same rate. C) The cell gains needed materials and gets rid of excess materials very quickly. D) The rate of diffusion cannot be influenced by the cell. E) Energy input is required to transport molecules.