Answer the following question given this paragraph: Some reactions need extra help to occur quickly. They need another substance called a catalyst. A catalyst is a substance that increases the rate of a chemical reaction. A catalyst isn't a reactant, so it isn't changed or used up in the reaction. Therefore, it can catalyze many other reactions. Q: Some reactions need extra help to occur quickly. they need another substance called what? Choices: - neurotransmitter - protein - hormone - a catalyst A:
a catalyst
Answer the following question given this paragraph: Thus the potential of a galvanic cell can be used to measure the pH of a solution. Exercise Suppose you work for an environmental laboratory and you want to use an electrochemical method to measure the concentration of Pb2+ in groundwater. You construct a galvanic cell using a standard oxygen electrode in one compartment (Ecathode = 1.23 V). The other compartment contains a strip of lead in a sample of groundwater to which you have added sufficient acetic acid, a weak organic acid, to ensure electrical conductivity. The cell diagram is as follows". Q: The potential of what can be used to measure the ph of a solution? Choices: - electrodes cell - symbiotic cell - stimulation cell - galvanic cell A:
galvanic cell
Q: Answer the following question given this paragraph: Q: Comparisons of amino acid sequences can shed light on the evolutionary divergence of what? Choices: - mammals - dinosaurs - birds - related species A:
A: related species
Question: Answer the following question given this paragraph: Energy from the Sun has a wide range of wavelengths. The total range of energy is called the electromagnetic spectrum . You can see it in Figure below . Q: Energy from the sun has a wide range of wavelengths.what is the total range of energy called? Choices: - heat spectrum - light spectrum - thermal spectrum - electromagnetic spectrum A:
Answer: electromagnetic spectrum
*Question*
Answer the following question given this paragraph: Figure 24.13 The lifecycle of an ascomycete is characterized by the production of asci during the sexual phase. The haploid phase is the predominant phase of the life cycle. Q: The lifecycle of an ascomycete is characterized by the production of what during the sexual phase? Choices: - abaci - flageli - cerci - asci A:
**Answer**
asci
(Question)
Answer the following question given this paragraph: Most plants continue to grow throughout their lives. Like other multicellular organisms, plants grow through a combination of cell growth and cell division. Cell growth increases cell size. Cell division increases the number of cells. Q: How do plants grow? Choices: - through cell growth and sexual reproduction - through mitosis and cell division - through pollination and cell division - through cell growth and cell division A:
(Answer)
through cell growth and cell division