1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
hjlf
3 years ago
7

In an experiment to determine the effect of exercise on pulse rate, a student checks his pulse rate before

Biology
2 answers:
nasty-shy [4]3 years ago
6 0
3. It serves as the control for the experiment. If he only checks his pulse rate after exercising th en there is no comparison to show whether th rate has increased, decreased, or remained unchanged.
Andrew [12]3 years ago
3 0

Answer:

The correct answer is option 3.

Explanation:

In the mentioned experiment, the pulse rate prior to performing exercise functions as a control of the experiment. Before doing exercise, the pulse rate would be under normal conditions, that is, without changing any variable, and thus is considered as the control for the experiment.  

In order to find a change witnessed in the pulse rate post performing exercise, the pulse rate post-exercise would be compared with the control pulse rate.  

You might be interested in
Which of these diseases is not spread by bloodborne transmission?
Murljashka [212]
Answer;
Tuberculosis 

Explanation; 
Bloodborne transmission involves transmission through contact with infected human blood and other body fluids such as semen, viginal secretions etc.
These pathogens include; HBV, HIV, STD's and viral hemorrhagic fevers.
Tuberculosis (TB) is not transmitted through the blooborne method but through airborne particles. 

6 0
3 years ago
Generally speaking, which of the following mutations.....? would most severely affect the protein coded for by a gene? -a base s
Svet_ta [14]
The answer is <span>a frameshift deletion at the beginning of the gene.

The frameshift deletion means that due to the deletion, the reading frame will be changed. Because of this, changed mRNA will be synthesized and translated into altered protein. It is known that codon is a triplet (a set of three nucleotides), that code for certain amino acid. The earlier in the sequence the deletion occurs, the protein will be more severely affected.
For example, if codons on RNA are THE BIG BAD DOG and the frameshift deletion happens on the first triplet (earlier in the sequence), the changed sequence will be  TEB IGB ADD OG. If </span>the frameshift deletion happens on the third triplet (later in the sequence), <span>the changed sequence will be THE BIG ADD OG.</span> This way, if the<span> frameshift deletion occurs at the beginning of the gene,</span> the more codons will be changed and in turn, they will code different amino acids.
7 0
3 years ago
Which planet has no atmosphere due to weak gravity?
Anestetic [448]
That would be Mercury
4 0
3 years ago
Read 2 more answers
Resource partitioning results in:_______. a. a move from the realized niche to the fundamental niche for both species. b. indivi
dlinn [17]

Answer: your answer I between b or d holp this helps

Explanation:

5 0
3 years ago
Increased atmospheric carbon dioxide negatively affects coral reefs by: select one:
Ksenya-84 [330]
Increased atmospheric carbon dioxide will diffuse to the ocean water (since normally, there is lower concentration of dissolved carbon dioxide in the ocean water). The dissolved carbon dioxide takes into the form of carbonic acid thereby increasing acidity of ocean water. More often than not, the acidification of ocean water leads to detrimental results especially in marine organisms that are pH sensitive such as coral reefs and many invertebrates.
8 0
3 years ago
Other questions:
  • The sabin vaccine was a liquid that contained weakened polio viruses. those who have received this vaccine are protected against
    9·2 answers
  • What is the point when Earth is closest to the Sun called?
    15·2 answers
  • What is the main function of cuticle in plants?
    5·2 answers
  • Where are sedimentary rocks formed?
    15·2 answers
  • According to Mendel's _______________, one copy of a gene is passed randomly from each parent to their offspring. This is why ga
    7·2 answers
  • What gives a cell structure and provides support for its internal organelles
    8·1 answer
  • Chemical reaction equations, such as the one for photosynthesis, show the reactants and products of a reaction. How does this si
    11·2 answers
  • WHOEVER ANSWEERS FIRST WILL GET BRAINLIEST
    10·1 answer
  • PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
    13·1 answer
  • The difference between PCR and real-time PCR is thatA. real-time PCR can measure the amount of DNA amplified as the reaction pro
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!