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
likoan [24]
3 years ago
9

13. Which of the following occurs in the cardiac cycle if the impulse triggered at the sinoatrial node never close?

Biology
1 answer:
Ilya [14]3 years ago
6 0
D. The atria will not contract.

You might be interested in
The invasion of body tissues by disease-causing pathogens is called a (an) _______.
goldenfox [79]
Answer would be infection
8 0
1 year ago
Samuel visited an ecosystem. he found that the weather is very hot and dry, the entire land is surrounded by sand, and the plant
Triss [41]
The answer is <span>b. desert biome </span><span />
5 0
3 years ago
The most apparent difference between modern humans and Australopithecus africanus is that Australopithecus africanus
lara [203]

Answer:

The correct answer is option d.

Explanation:

An extinct species of australopithecine, that is, Australopithecus africanus was the first species to be illustrated. It was of gracile or slender build and was considered to have been the direct ancestor of modern humans. Like modern man, the A. africanus did stood upright and walked upright, and were having free hands to use. However, they were smaller in height and lighter in weight in comparison to modern man.

3 0
3 years ago
A valid hypothesis must be testable.<br> a. True<br> b. False
exis [7]
<span>True. A valid hypothesis must be testable and able to be verified or disputed empirically, because otherwise it is not a scientific hypothesis. A hypothesis that is not readily testable (for example, about a made up or fictional event) are not good hypotheses.</span>
8 0
3 years ago
HELP QUICKLY Why are the deepest high tides so deep and the shallowest low tides so shallow? Hint: how are the Earth, Sun, and M
Vikki [24]

There are different kinds of tides. This change occur because  when the gravitational pull of the sun works along with the gravitational pull of the moon on Earth, it leads to the oceans bulging out.

  • This result above makes the high tides as been little higher and low tides been little lower than normal.

Spring tides are known to be the deepest as oceans levels are highest in this kind of tide. The neap tides are known to be the shallowest.

This often occurs when the moon, earth, and sun are said to be at a right-angled plane.  Therefore, the gravitation pull of the moon and sun on the oceans do counteract each other making its net effect is smaller.  

Learn more about Tide from

brainly.com/question/1133278

7 0
3 years ago
Other questions:
  • The trait of extraversion often correlates around 50% for identical twins and around _______ for fraternal twins.
    9·2 answers
  • Which biological process takes advantage of chemical bonds
    10·1 answer
  • Gabby received high-quality prenatal care from the care team at her local hospital. she was informed about what to eat and what
    6·1 answer
  • each pair of electrons is passed down the chain, dropping in _____ needed for active transport of H+ ions against their _____.
    5·1 answer
  • He male reproductive system includes
    14·1 answer
  • Which level of classification is the most specific (only one type of organism). How did you come to this answer
    10·1 answer
  • Please help me answer this 5 questions i mark you as brainlist
    9·1 answer
  • Cells in the body use oxygen
    10·1 answer
  • If two organisms possess similar structures that serve similar functions but don't possess a common ancestor that shared that st
    8·1 answer
  • What is the most likely position for the hurricane indicated by the wind readings from the three weather stations shown?
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!