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
Romashka [77]
3 years ago
7

SERIOUSLY I NEED HELP I AM TAKING A QUIZ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Biology
2 answers:
Setler [38]3 years ago
8 0

c is the correct answer

dem82 [27]3 years ago
3 0

Answer:

cardiac

Explanation:

An electrical stimulus is generated by the sinus node (also called the sinoatrial node, or SA node). This is a small mass of specialized tissue located in the right upper chamber (atria) of the heart. The sinus node generates an electrical stimulus regularly, 60 to 100 times per minute under normal conditions.

You might be interested in
How has the fall affected specifically living things
emmasim [6.3K]

Answer:

The fall made animals and plants affected by disease. It was hard to get food,many things died and it also made some animals into carnivores.

4 0
3 years ago
Down syndrome in humans may result from. A a person inheriting a recessive allele. B sickle-shaped cells becoming stuck in blood
katen-ka-za [31]
C born with an extra chromosome
8 0
3 years ago
Give examples of terrestrial food chain.(one edaphic food chain and one aboreal food chain​
andrey2020 [161]

Answer:

how much should examples should I give

7 0
2 years ago
Which of the following statements about chromosomes is true?
SashulF [63]

Answer: different organisms have different chromosome numbers

Explanation: eukaryote cells have more than one chromosome

chromosomes are present in most cells all the time (not in erythrocytes), but cannot be visualised except during telophase of mitosis or meisosis

bacterial cells don’t have a nucleus

7 0
3 years ago
what role does molecular evidence play in determining how closely two species are related to each other
qwelly [4]
Recall the endosymbiosis hypothesis and recall endosymbiosis. Remember that the very first cell was a prokaryotic cell. Which engulfed chloroplast precursors and mitochondria. We all come from these cells. And how we evolved over time shows the relationship. I'm a bio major hope I helped
5 0
3 years ago
Other questions:
  • Which two microscopes generate three-dimensional images?
    14·1 answer
  • Identify the part of the mandible that serves as a site of attachment for the temporalis muscle.
    6·1 answer
  • In a deciduous forest ecosystem which of these organisms would be a decomposer
    7·1 answer
  • An open-minded scientist does all of the following except A. think creatively to design experiments. B. accept new ideas that he
    8·2 answers
  • Elements are formed from ______?
    7·2 answers
  • Regarding the geology of the oceans, creation scientists propose:
    8·1 answer
  • Which factors affect the rate of deposition? Check all that apply.
    14·2 answers
  • The Appalachian Mountains were formed about 500-400 million years ago. What has caused them to change so much over time
    11·1 answer
  • Bio chem question<br><br>Explain why​
    5·1 answer
  • 1. What factors are in an ecosystem?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!