If the threshold of excitation is reached, action potential begins, which causes the inside of the cell to temporarily have a __ charge. positive negative neutral positive or negative

Proteins are the end product Mitosis Meiosis Both Neither

Question 10 of 10 Which example describes making inferences based on observations? A. A researcher uses reasoning to determine which types of plants would make the most beautiful arrangement in a garden. B. A researcher collects seeds of rare plants to take to a conservatory so the plants can be grown and studied. C. A researcher uses reasoning to conclude that an organism containing chloroplasts is a plant. D. A researcher grows plants in a botanical garden so other researchers and the public can see them.

Which of the following is NOT a phase of mitosis? a mesophase b telophase C anaphase d prophase

manuple Select all that apply Which of the following are bioelements? Phosphorus Cesium Nitrogen Carbon Radium Oxygen Hydrogen

Heme is broken down into what pigment, which is excreted in bile? Select one: a. Amino acids b. Iron c. Bilirubin d. Melanin

A person with neither A, nor B antigens on the red blood cell would have which blood type? Select one: a. A b. B c. AB d. 0

Match the term with the correct definition. 1. digested easily by the body 2. line the nerves and organs of the body 3. often found in vegetables and rice 4. release energy slowly into the blood 5. can be acquired from a pill 6. contain all nine essential amino acids 7. prevents dehydration square incomplete proteins square fats square simple sugars square complex carbohydrates square water square vitamins square complete proteins

Increasing the concentration of external K+ will result in: Hyperpolarization of neurons Depolarization of neurons Blocking the refractory period Increased diffusion of K+ out of neurons

What is the difference between genetic variation and a mutation? a. There is no difference - they are the same b. Genetic variation happens in RNA, while mutations happen in DNA c. Mutations are always harmful, while genetic variation can be beneficial d. Mutation is due to changes in the DNA sequence, while genetic variation is differences in the genes of individuals in a population.

Hot Questions

Select the correct answer. Which of the following phrases best explains the role of a habitat? A. provides interactions with other organisms B. provides water C. provides a place to reproduce D. provides a place to live

Which type of membrane protein moves sodium and potassium through the nerve cell membrane? Junction protein Transport protein Receptor protein Channel protein Enzymatic protein Cell recognition protein

Multiple Select Question Select all that apply Choose all that result from contraction of the lateral muscle of the thigh. abduction of the thigh lateral rotation of the thigh extension of the thigh adduction of the thigh medial rotation of the thigh

Match the Process to the Pool Movement Carbon Moves From -To __ Atmosphere __ __ Bioshpere __ __ __ __ __ Process Photosynthesis Respiration Decomposition Fossil Fuel Combustion __ __

The kidney is associated with which system? A. Endocrine system B. Cardiovascular system C. Skeletal system D. Respiratory system E. Nervous system

What is the direct effect of: Decreased ADH Only CO increases Only CO decreases Only BP increases Only BP decreases Both CO and BP increase Both CO and BP decrease

What are the four phases of a typical bacterial growth curve in order? Exponential, Lag, Death Stationary Lag, Exponential, Stationary, Death Death, Lag, Exponentlal, Stationary $Lag,$ Stationary, Death,Exponential

8. Oxygenated blood from the lungs enters the heart at the: a. left ventricle b. right ventricle c. left atrium d. right atrium

Bacteria that grow optimally at pH levels below 5 are classified as: Neutrophiles Alkaliphiles Acidophiles Halophiles

Which group of bacteria can survive and grow at temperatures below $15^{\circ }C$ Thermophiles Psychrophiles Mesophiles Hyperthermophiles