Answer:
the blood would stop pumping, because the blockage allows the blood to move one way, but when there is not blockage, the blood would enter from both ways making it impossible to regulate
PLEASE PLEASE PLEASE HELP ME WITH THESE 4 QUESTIONS!!!!!!!!!!! PLEASE
Answer: they are blurry
Explanation:
explain Darwin's theory of natural selection
Answer:
More individuals are produced each generation that can survive. Phenotypic variation exists among individuals and the variation is heritable. Those individuals with heritable traits better suited to the environment will survive.
Explanation:
More individuals are produced each generation that can survive. Phenotypic variation exists among individuals and the variation is heritable. Those individuals with heritable traits better suited to the environment will survive.
Which of these are part of the respiratory system? (Select all that apply.)
larynx
sinuses
heart
lungs
Answer:
larynx, sinuses, lungs
Explanation:
Answer:
larynx, sinuses, lungs
I know this is old, but just in case anyone else needs it
Science is the systematic study of
Answer: From internet put it in your own words . Hope this helped
Explanation: "Science is the intellectual and practical activity encompassing the systematic study of the structure and behavior of the physical and natural world through observation and experiment
FIRST TO ANSWER 15 POINTS PLUS BRAINLIEST What is a benefit of Nuclear Energy?
Answer:
Explanat}
there is long term storage for nuclear waste
Energy cycles through ecosystems because it returns to the Sun.
A True
B False
Answer:
false
Explanation:
The statement "Energy cycles through ecosystems because it returns to the Sun" is definitely false.
What is an Ecosystem?An ecosystem may be defined as a type of place or an area where members of different species live together and interact with one another for the purpose of food, shelter, space, and mating partner.
The ultimate source of energy for the living being is delivered by the sun. But the sun never takes this energy in any form. It is true that the energy cycle in the ecosystem but does not passes to the sun. It gets cycled through living organisms like plants, animals, and microorganisms.
The plants captures the energy from sunlight through photosynthesis, herbivores take energy from plants, carnivores take energy from herbivores, and the microorganisms get energy from dead and organic matter.
Therefore, the statement "Energy cycles through ecosystems, because it returns to the Sun", is definitely false.
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how has electricity generation changed in Minnesota since 2001?
Answer:
Since 2001, the amount of electricity generated by Minnesota's independent power producers has increased dramatically. The majority of the electricity generated in Minnesota is generated by utilities; however, the amount provided by independent power producers has increased significantly over the last two decades.
Because burning fossil fuels creates much pollution, alternatives are being investigated. What might limit the use of wind as a major energy source?
Answer:
There isn't wind all the time, so wind being used as a major energy source is very unlikely.
Answer:
there isnt always a lot of wind so it wouldnt be a reliable energy source
Explanation:
Which of the following is the correct equation for photosynthesis?
carbon dioxide + water+ sunlight = oxygen + water
oxygen + water + sunlight = carbon dioxide + sugar
carbon dioxide + sunlight = sugar
carbon dioxide + water+ sunlight = sugar + oxygen + water
PLEASE HURRY NO LINKS OR I WILL REPORT U
Answer:
carbond dioxide + water + sunlight = sugar + oxygen + water
How did the formation of the ozone layer contribute to the existence of life on Earth?
Answer:
It blocked the suns harmful UV rays !
Hope this helps!
What expression represents chromosome numbers during fertilization?
Answer:
n + n = 2n I think.
Write down FOUR steps in growing bacteria cultures
Answer: Bacteria reproduce when one cell splits into two cells through a process called binary fission. Fission occurs rapidly in as little as 20 minutes. Under perfect conditions, a single bacterium could grow into over one billion bacteria in only 10 hours!
Hope this helps :3
Explanation:
https://learning-center.homesciencetools.com/article/bacteria-experiment-guide/
Answer:
What bacteria needs to grow and multiply:
Food (nutrients)
Water (moisture)
Proper temperature.
Time.
Air, no air, minimal air.
Proper acidity (pH)
Salt levels.
Can i have a brainliest pleaseee:)
what is the function of the stratified squamous epithelium of this type of tissues
Answer:
The stratified squamous epithelium provides protection against mechanical stress, chemical abrasions, and even radiation. The keratinized epithelium present on the surface of the skin blocks out the harmful radiation and prevents the exposure of internal tissues and organs to the radiation.
Explanation:
¡I hope it helps you!
please help me on this I'll give the most brainliest whoever get's this question right
12
Suppose a fire burns through the beetles habitat, leaving the trees, soil, and some rocks
charred black for several years. Most of the beetles and their predators survive the fire and
continue to live in the habitat.
a. Identify which beetle phenotype or phenotypes will most likely be favored in the habitat
after the fire. Explain your answer.
b. Identify the type of natural selection (directional, stabilizing, or disruptive) that will most
likely act on the beetle population.
The type of natural selection you identified in part (b) will change the phenotype distribution
in the beetle population.
c. Using your knowledge of natural selection, explain how the change in phenotype
distribution will occur.
Answer:
The answer is B
HAVE A BLESSED DAY WONDERFUL CREATION OF GOD
Explanation:
B.Identify the type of natural selection (directional, stabilizing, or disruptive) that will most likely act on the beetle population. The type of natural selection you identified in part (b) will change the phenotype distribution.
What do you mean by the term natural selection?Natural selection is the process in which the species are adapted to their environment.
Natural selection leads to evolution when the people having certain characteristics posses the greater chance of survival than the others that are not adapted to the changes, these adapted characteristics are passed to the next generations.
Thus, this could be the answer.
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What is a scientific theory? The sentences above help to describe a scientific theory. One sentence is not quite
accurate though. Choose the sentence that needs to be modified and make the necessary modification so it may be
included in the description of a theory.
A)
D. A scientific theory has a simple basis: an experiment done to test a
hypothesis.
B)
C. Theories are descriptions, often mathematical descriptions of natural
phenomenon;
A. A scientific theory is based on a scientific investigation that supports a
hypothesis.
D)
B. When new information does not support a scientific theory, the theory
may be revised or sometimes rejected.
Answer:
Original sentence: When new information does not support a scientific theory, the theory may be revised or sometimes rejected.
New changed sentence: When the results of the experiment do not support a hypothesis, the hypothesis must be revised or rejected to state a new scientific theory.
Explanation:
The scientific theory is a conceptual framework used to explain facts or phenomena and to make predictions.
The theory is fundamental to science because it allows scientists to organize and understand observations.
The construction of a theory begins with a hypothesis. The scientist believes that a phenomenon occurs in a certain way, so he/she performs observations under the scientific method to prove that his/her hypothesis is valid or not valid. The systematization of the observations and the empirical data collected might derive from a scientific theory that explains the analyzed phenomenon.
A scientific theory is a knowledge that has been contrasted in several ways.
Which of the following body systems work together for support, protection, and movement?
A. respiratory and cardiovascular
B. skeletal and muscular
C. skeletal and integumentary
D. digestive and respiratory
Answer:
B
Explanation:
The skeleton helps in support and movement...
hope this helps
When did the Paleozoic Era begin?
66 million years ago
400 million years ago
4 billion years ago
550 million years ago
The Paleozoic Era began approximately 550 million years ago and ended approximately 252 million years ago.
What is Paleozoic Era?The Paleozoic Era is a geological epoch that lasted about 541 million years and ended about 252 million years ago.
It is also known as the "Age of Invertebrates" because it witnessed the rise and dominance of numerous invertebrate groups, including trilobites, brachiopods, and ammonites.
From oldest to youngest, the Paleozoic Era is divided into six periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian.
Many significant events in the evolution of life on Earth occurred during this time period, including the Cambrian period's explosion of diversity, plant and animal colonization of land, and the emergence of reptiles and insects.
Thus, the answer is 550 million years ago.
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what is the temperature at which enzymes work best and worst?
Answer:
There is a certain temperature at which an enzyme's catalytic activity is at its greatest which is 37.5 oC
Enzymes are still proteins, and as with all proteins, temperatures above 104 degrees Fahrenheit, 40 degrees Celsius, will start to break them down.
Explanation:
The temperature for most enzymes is about 98.6 degrees Fahrenheit (37 degrees Celsius).There are also enzymes that work well at lower and higher temperatures.
Hope this helped!!
In which substances can the electrons move randomly?
Answer:
Conductors
Explanation: the substances which have a large number of free electrons and offer a low resistance are called conductors
what type of rock can form deep below Earth's surface?
Answer:
Bedrock
Explanation:
in oretty sure it forma underground
Answer:
Igneous rocks
Explanation:
Igneous rocks that form below the Earth's surface are called intrusive igneous rocks (or plutonic). They form when magma enters an underground chamber, cools very slowly, and forms rocks full of large crystals. Igneous rocks that form above the Earth's surface are called extrusive igneous rocks.
positive impacts humans have on water
Answer:
Positive Human Interaction When people build dams channeling off large bodies of water, the water builds up along the edge of the lake, pond, or stream creating very fertile soil from the constant watering and these areas on the outside of lakes and ponds are used by humans for growing and farming crops.
Explanation:
how does the effectiveness of hand washing show the major function of the integumentary system?
Answer:
Handwashing with soap removes germs from hands. This helps prevent infections because People frequently touch their eyes, nose, and mouth without even realizing it. Germs can get into the body through those said body parts and make us sick.
Hope i answered your question! xoxo
How is density affected when the salinity increases?
Answer:
The density of water increases as the salinity increases. The density of seawater (salinity greater than 24.7) increases as temperature decreases at all temperatures above the freezing point. The density of seawater is increased by increasing pressure
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How is density affected when the salinity increases?
[tex] \huge \sf \green{Answer}[/tex]
When salt is dissolved in fresh water, the density of the water increases because the mass of the water increases.
Salinity describes how much salt is dissolved in a sample of water. The more salt there is dissolved in the water, the greater its salinity. When comparing two samples of water with the same volume, the water sample with higher salinity will have greater mass, and it will therefore be more dense.
What's the answer please??????????
Answer:
species IV is the one most closely related
Explanation:
act gca ccc
act gca ccg
its just one letter off
Write the complementary base sequences below each given base (please someone help me)
AGTTACGA. CAGCCTTG. ATTAGCCT
Answer:
TCAATGCT. GTCGGAAC. TAATCGGA
Explanation:
Matching base pairs in a nucleic acid sequence may form a double-stranded structure.
C-A-T-G with a complementary base would be is G-T-A-C.
How is it possible for a mutation not to produce any visible effect in an
organism?
Answer:
Some mutations don't have any noticeable effect on the phenotype of an organism. This can happen in many situations: perhaps the mutation occurs in a stretch of DNA with no function, or perhaps the mutation occurs in a protein-coding region, but ends up not affecting the amino acid sequence of the protein.
Which of the following is the responsibility of government to save habitats? Select all that apply.
A. using fertilizers always
B. using too much chemicals
C. establishing more open spaces and regulations
D. using less fuels
All of the humans in a particular city would be considered a population. True or False?
Answer:
The Answer is gonna be True:3
This is the right Answer :3
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PLEASE HELP!
describe two ways to transfer electric charge
.Answer: conduction or polarization
Answer:
conduction, friction
Explanation:
Friciton: When insulating materials rub against each other, they may become electrically charged . Electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. The material that gains electrons becomes negatively charged.
Conduction: During charging by conduction, both objects acquire the same type of charge. If a negative object is used to charge a neutral object, then both objects become charged negatively. In order for the neutral sphere to become negative, it must gain electrons from the negatively charged rod.