1. Homeostasis relates most directly to which of the following ideas?
a. interacting systems
b. stability
c. evolution
d. scale and structure
I'm stuck between A and B
2. The physician Ronald Ross wanted to find the cause of malaria. Based on his observations, Dr.Ross suggested that Anopheles mosquito might spread malaria from person to person. This suggestion was a
a. dependent variable
b. hypothesis
c. theory
d. data analysis
C?
4. Which of the following statements about enzymes is true?
a. Enzymes are able to heat up molecules so they can react.
b. Enzymes always provide carbon dioxide for chemical reactions.
c. Enzymes are biological catalysts which act on a substrate
d. Enzymes absorb excess heat so that reactions occur at low temperatures
Not sure...
Thanks
-MC
4. C
2. I like hypothesis, it is specific, and testable.
Homestatis is stablity.
Also:
15. Which of the following is NOT true about DNA replication?
a. It must occue before a cell can divide
b. Two complementary strands are duplicated
c. The double strand unwinds and unzips while it is being duplicated
d. The process is catalyzed by enzymes called DNA mutagens
D?
Thanks
-MC
Thanks
I had two biology posts up earlier today that no one's been answering. D'you think you can help me out with those please?
-MC
1. To determine the correct option between A and B for the question about homeostasis, we need to understand what homeostasis means. Homeostasis refers to the ability of an organism or a system to maintain internal stability despite external changes. It is about achieving and maintaining a state of balance or equilibrium.
From the given options, the idea that most directly relates to homeostasis is stability (option B). Homeostasis is all about maintaining stability within an organism or system. While interacting systems (option A) may play a role in achieving homeostasis, the key concept here is stability.
2. Dr. Ronald Ross wanted to find the cause of malaria, and based on his observations, he suggested that Anopheles mosquitoes might spread malaria from person to person. Since this suggestion was based on observations and was used to explain a phenomenon, it can be categorized as a hypothesis (option B). A hypothesis is a tentative explanation that can be tested and further studied.
3. The question you mentioned as number 3 is missing, but let's move on to the next one.
4. Looking at the given options for the statement about enzymes, we can determine which one is true by understanding the role and function of enzymes. Enzymes are biological catalysts, meaning they facilitate chemical reactions by lowering the activation energy required for the reaction to occur.
The correct option is c. Enzymes are biological catalysts which act on a substrate. Enzymes bind to a specific substrate and assist in chemical reactions without being consumed or permanently changed by the reaction. The other options provided (a, b, d) are not accurate statements about enzymes.
So, to summarize:
1. Homeostasis primarily relates to stability (option b).
2. Dr. Ronald Ross's suggestion about mosquito transmission of malaria is a hypothesis (option b).
4. The correct statement about enzymes is that they are biological catalysts which act on a substrate (option c).
I hope this helps! Let me know if you have any further questions.