Answer:
Explanation:
The sound of a heartbeat is caused by the heart valves opening and closing as they pump blood. When the heart is working properly, blood can only flow in one direction. The valves make this possible by opening and closing in exact coordination with the heart’s pumping action
2. According to the passage, two American scientists found "unexpected static in their radio
antennas". Cosmologists have developed models to advance their understanding of the universe.
The various discoveries and models used to attempt to explain the creation of the universe is an
example of which scientific principle? *
(25 Points)
O A. A scientific theory
ws
B. A scientific law
O C. A scientific conundrum
O D. Scientists replicate research findings
Pls help
Answer:
The answer is A scientific theory
Explanation:
I just did it
can any one please tell me the differences between phrases and clauses with examples. I will mark the first person brainliest
Answer:
A clauses is a group of words with subject-verb until; the 2nd groups of words contains the subject-verb unit the bus goes, so it is a clauses. A phase is a group of words without a subject-verb unit.
In________The phenotypes for both alleles are clear expressed
Ill give brainliest... its currently 12:20 am and im too tired to re answer this "correctly". Please help a human out
Many pine trees grow in the taiga, the largest habitat in the world. Using credible sources, such as NASA, research the typical climate conditions in the taiga. Explain why the structure of pinecones helps ensure successful reproduction in the taiga.
Answer:
Explanation:
Taigas have few native plants besides conifers. The soil of the taiga has few nutrients. It can also freeze, making it difficult for many plants to take root. The larch is one of the only deciduous trees able to survive in the freezing northern taiga.
Study the cladogram.
Which two organisms are the most closely related?
A:lamprey and gorilla
B:salamander and lizard
C:tiger and shark
D:lizard and lamprey
Answer:
B. Salamander and Lizard
Explanation:
Answer:
B
Explanation:
As an airplane rises through the atmosphere, machines cause the pressure inside the cabin to decrease. Why is this change in pressure necessary?
Answer:
I think D or B i hope this helps!
Explanation:
Answer: Air pressure inside the plane should match the air pressure outside the plane.
The plane needs to stay balanced.
Got it right on the test.
An object's average speed is found by dividing the total distance the object travels by the total
А
mass of the object.
B
acceleration of the object.
specific gravity of the object.
D
time it takes to move that distance.
Answer:
D. Time
Speed = Distance / Time
Answer:
D time
Explanation:
How is an organism's ability to produce offspring affected by changes to a chromosome??
Answer:
its affected by the number of chromosomes they have
Do you think that the following statement is
correct? "Exoskeletons are a defensive
adaptation. (2)
Answer:
true
Explanation:
Exoskeletons have a role in defense from pests and predators, support and in providing an attachment framework for musculature.
PLEASE HELP picture above 13 points
Only about 10 percent
of the energy from each
level of an energy
pyramid is available to
the trophic level above
it. (The rest is used to
power life processes or
is lost as heat.)
If the primary producers
have 10,000 units of
stored energy, how
much energy would you
expect to be transfered
to first-level, second-
level, and third-level
consumers?
Answer:
First leve consumer: 1,000 energy units
Second level consumer: 100 energy units
Third level consumer: 10 energy units
Explanation:
First level consumer: 1,000 energy units. Second level consumer: 100 energy units. Third level consumer: 10 energy units.
What is trophic level?The group of species in an ecosystem that are at the same level in the food chain is referred to as a trophic level. A food chain has five basic trophic levels, each of which has a different nutritional relationship to the main energy source.
The Sun is any ecosystem's main source of energy (although there are exceptions in deep sea ecosystems). Primary producers, sometimes referred to as autotrophs, receive their energy input from the Sun's solar radiation.
The first trophic level is made up of primary producers. Consumers, also known as heterotrophs, make up the remaining trophic levels; heterotrophs are unable to reproduce.
Therefore, First level consumer: 1,000 energy units. Second level consumer: 100 energy units. Third level consumer: 10 energy units.
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Summarize the facts about Huntington's disease by completing the concept map below.
Answer:
There is no effective cure.
the disease is caused by a single defective gene on chromosome 4.
the disease causes a breakdown of nerve cells in the brain.
as early as age 2 or as late as 80. but usually 30 and 50.
molecular analysis, i don't know the last words sorry
There is no effective cure, the Huntington's disease is caused by a single defective gene on chromosome 4 causes a breakdown of nerve cells in the brain.
What are genes ?
Genes are segments of DNA which are located on chromosomes contain the information's for protein production, in humans 25,000 genes are present, which exist in more than one form.
The alternative forms of gene which are are expressed as a character in a species are called alleles and they are typically present as two alleles for a given trait.
Alleles gives distinct traits that can be passed on from parents to offspring known as Mendel's law of segregation.
In humans, alleles of a gene come in pairs, one on each chromosome, If both the alleles of a particular gene are the same, the individual is called as homozygous, If they are different the organism is described as heterozygous for that gene.
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I AM SOOO CONFUSED, PLEASE HELP ME!!!
Answer: A
Explanation:
Look at page 2 of the Article. What makes some plants more sustainable? Drag four correct
answers into the box.
surfers put wax on their boards to reduce friction between the board and the water. how does reducing friction affect the speed at which a surfboard moves?
Answer
ESurfboard wax (also known as surfwax) is a bodyboard, or skimboard, to keep the surfer from slipping off the board when paddling out or riding a wave. It is also used to increase grip on the paddle of a dragon boat or surf board.
Explanation:
All of the following are classified as abiotic factors EXCEPT
a pH
b. bacteria
b. salinity
d. oxygen concentration.
Answer:
In the group of terms, the exception to abiotic factors is bacteria (option b).
Explanation:
Abiotic factors correspond to the elements of an ecosystem that are not considered alive, such as soil, wind, temperature, pH, among others.
All living beings in an ecosystem are biotic elements, including microorganisms such as bacteria. The dynamics of living beings influence the ecosystem, just as abiotic factors influence both the biotic elements and the development of the ecosystem.
Why does Meiosis have two sets of replications?
If a tongue cell in an alligator has 18 chromosomes, how many chromosomes will be found in its sperm cells?
Answer:
9 chromosomes - haploid number of chromosomes , half of a diploid number.
**ASAP** What do viruses like coronaviruses and animal cells have in common?
Like other viruses, animal viruses are alike to viruses by tiny packages of protein and nucleic acid. They have a protein shell, or capsid, and genetic material made of DNA or RNA that's tucked inside the caspid. They may also feature an envelope, a sphere of membrane made of lipid.
What are enzymes and how are digestive enzymes used in your digestive system?
Options;
a) They are lipids that help make fats to then pass on to other cells that need them.
b) They are proteins that would break down the food into smaller pieces.
c) They are lipids that help make membranes to move food into and out of the cell.
d) They are proteins used to make more proteins for the digestive system.
Answer:
B. Proteins are present in the Stomach acid that help break down food/drink for our digestive system to get nutrients.
PLS HELP!!!!!
which process is used by animals to obtain food from the environment?
a. egestion
b. dehydration synthesis
c. mechanical digestion
d. ingestion
Answer:
D ingestion
Explanation:
How is the cell membrane adopted to its function
Answer:
The cell membrane is selectively permeable and able to regulate what enters and exits the cell, thus facilitating the transport of materials needed for survival. ...
Explanation:
Because the membrane acts as a barrier for certain molecules and ions, they can occur in different concentrations on the two sides of the membrane.
How is the DNA of all organisms common?
Answer:
the dna for all organisms is commen because almost every living thing had dna from both there mother and father
Explanation:
13. What term do we use to describe the maintenance of constant conditions, such
as blood glucose levels, body temperature and water levels, inside the body?
A. Hormonal control
B. Nervous system
C. Homeostasis
D. Endocrinosis
Answer:
C. Homeostasis
Explanation:
"Homeostasis" refers to the process of maintaining the body's equilibrium. The body tries to adjust to different stimuli in order to help it function in normal ranges. For example, when a person is exposed to a cold weather all of a sudden, the person starts to shiver in order to maintain homeostasis. Shivering is a contraction of the muscles that allows the generation of heat.
On the contrary, when a person is exposed to the sun during summer, his body will start to sweat in order to maintain homeostasis. Sweating allows the heat to dissipate from the body thereby lowering the body's temperature.
plz solve my doubt plz plz it is biology
Answer:
1. C
2. A
3. D
4. D (I think)
5. C
Explanation:
I knew some things, and I goo.gled some.
Answer: Rain Gauge, Frigid Zone Region, All of them, Seals, Canopy
Explanation: I looked it up.
What must happen for the disease to spread from one person to another?
ano ang iyong naramdaman nang balikan at suriin mo ang pagpapasiya at pagkilos na isinagawa mo ng mga nagdaang araw
Answer:
I feel happy and sorry.
Explanation:
I have different feelings when I go back and analyze the decisions and actions I have taken in the past few days because some of my decisions are right and some are wrong. I feel happy when I go back and find out my decision and actions were right, while on the other hand, I feel sorry when I find out that some of my decisions and actions were wrong.
How can scientists determine whether an extinct animal gave birth on land or under water?
Answer:
Location of the hind limbs of the fetus
Scientists can determine whether an extinct animal gave birth on land or under water can be determined by the position of the head of the fetus. Thus, the correct option is C.
What are Extinct animals?
An extinct animal is an animal which no longer exists. It is completely gone and can no longer be found on the planet Earth. It can be hard to tell exactly when a species, or a specific type of animal has become extinct in nature. Sometimes, scientists think that an animal has disappeared due to changes in the environment, only to find another living animal many years later.
Scientists can determine whether an extinct animal gave birth on land or under water on the basis of position of the head of the fetus.
Therefore, the correct option is C.
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Your question is incomplete, most probably the complete question is:
How can scientist determine whether an extinct animal gave birth on land or water?
A) Location of the hind limbs of the fetus.
B) Position of the nostrils.
C) Position of the head of the fetus.
D) Location of the fossils.
The initial steps in gene expression are modeled below. Double-stranded DNA first unwinds into two strands. Which process and product are represented in Diagram 2?
Answer: The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands.
help me please will give brainliest
Answer:
okazaki fragments is the answer
Explanation:
