Answer:
Neurotransmitter Effects. In addition to direct neural innervation of the heart, the nervous system can also affect the cardiovascular system through releasing chemical messengers, or neurotransmitters, into the bloodstream.
Is a scar an inherited or an environmental change?
Answer:
a scar is a environmental change
Answer:
environmental change
Explanation:
Limiting factors caused by
natural disaster tend to be
which of the following?
A. Density-balanced
B. Density-dependent
C. Density-independent
Answer:
C. Density-independent
Explanation:
Limiting factors caused by natural disasters that tend to be Density-dependent. Thus, the correct option for this question is B.
What are the Limiting factors?The Limiting factors may be defined as anything that significantly constrains a population's size and declines or stops it from growing. Some examples of limiting factors may include biotic, like food, mates, and competition with other organisms for resources.
According to the context of this question, density-dependent factors are those factors that vary with respect to the density of the population. These factors affect a higher proportion of individuals when population densities are higher.
And a lower proportion when population density is lower. Examples of these factors may include, food, competition, predation, competition, parasitism, accumulation of toxic waste, etc.
Therefore, limiting factors caused by natural disasters tend to be Density-dependent. Thus, the correct option for this question is B.
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Wind is caused by the heating and cooling of Earth.
True or false
Answer:
true
Explanation:
Wind is the movement of air caused by the uneven heating of the Earth by the sun.
Hope this helps!
Answer: true
Explanation:
some unicellular organism develop cyst why
Answer:
Cysts develop when the cell mutates unexpectedly. This is a bit rare to happen in a unicellular organism, because they only have one cell. Unfortunately, this is more common for us because we have roughly 39 billion cells.
I hope this answers your question!
(PLEASE HELP IT IS DUE TODAY)
1. Which statement best describes stem cells?
A. Stem cells are commonly found in the brain of adults.
B. Stem cells are flowing through our veins delivering oxygen to the other cells of your
body.
C. Stem cells are only found in prokaryotes.
D. Stem cells are unspecialized cells that have the potential to differentiate into a wide
variety of cell types.
Answer:
It might be A
Explanation:
It might be A because stem cells are usually found in brain, blood, bone marrow, muscle, skin, heart, and liver tissues.
Answer:
the answer to that one is D
Identify the two sources of pressure acting on an object at a depth of 10m.
tbh i knew this answer but forgot
Explanation:
Which is the correct order of events for hormones activating gs proteins?.
Answer:
activation of G protein, binding of GTP, activation of adenylate cyclase, conversion of ATP to cAMP
Explanation:
6. What is the main source of energy in photosynthesis?
a. carbon dioxide
b. light c. glucose
d. oxygen
Answer:
B. Light
Explanation:
Photosynthesis uses the thermal energy from sunlight to react with carbon dioxide and oxygen, producing glucose.
Answer:
light
Explanation:
the main source of energy is light because light brings energy to the thylakoid membrane in the chlorophyll which causes electrons from the photolysis of water to get excited.
Need help been on this question for a couple minutes now!
Answer:
D
Good luck!!! Let me know if it's wrong
what is the two different between vacuole and nucleus of a cell
Answer:
It is spherical in shape and directs and command all the function of the cell, Found only in eukaryotes
Explanation:
vacuole are fluid filled membrane bound space .there are many small vacuoles in plant cell and one large vacuole in animal cell
Answer:
vacuole stores nutrients. Nucleus control the parts of the cells
Explanation:
vacuole stores nutrients for later use, so that the cell is free from contamination.
Nucleus is the largest organelle inside the cell. It is the leader or brain who controls and commands the other organelles what to do.
Explain
A) Photosynthesis is responsible for providing the oxygen needed for all life forms on Earth.
B) Carbon dioxide and oxygen are exchanged by organisms through these two processes: photosynthesis and cellular respiration.
C) Cellular respiration, through the breakdown of glucose, supplies the oxygen needed for aerobic metabolism by most organisms on Earth.
D) Photosynthesis is responsible for the transformation of solar energy into usable chemical energy, glucose, used by most organisms on Earth
Answer:
The answer is D
Explanation:
I just took the test
Type the correct answer in the box. Spell all words correctly.
Which term completes the sentence given below?
Proponents of animal
are strictly against the use of animals,
Reset
Next
Answer:
i think its welfare i'm sorry if i get it wrong
Explanation:
Answer:
modest
Explanation:
The base pairs in a DNA strand are held together with hydrogen bonds. If the two nitrogenous bases in each pair were held together with covalent bonds instead of hydrogen bonds, what effect would it have on the cell?
Answer:
Explanation:
Complementary base pairing is important because the hydrogen bonds between the bases hold the two strands of DNA together and because it serves as a way for DNA to replicate.
explain why the Antarctic circumpolar current is the only surface current that circles the entire globe
Answer: The current is circumpolar due to the lack of any landmass connecting with Antarctica and this keeps warm ocean waters away from Antarctica, enabling that continent to maintain its huge ice sheet.
Explanation:
Answer:
There are no landmasses to block the Antarctic Circumpolar Current.
Explanation:
Why are there no plants in the aphotic
zone?
A. There is not enough free space to accommodate a
plant colony.
B. There are too many predators, so plants can't survive
long enough to reproduce.
C. There is not enough light for plants to undergo
photosynthesis.
D. There is too much traffic, and plants get trampled
before they can put down roots.
Answer:
C, there is not enough light
Explanation:
Let's look at the word "aphotic". It can be broken into two parts, "a" and "photic". "a" means "not" and "photic" means "light". So, together, they mean "not light". Even if we knew nothing about marine life, we could answer this!
Answer:c
Explanation:
How does pioneers affect the variety of organisms in an ecosystem?
A certain drug decreases heart rate by producing depolarization in the pacemaker cells of the heart. This drug probably binds to ___________________.
This drug probably binds to the funny channel in the heart.
What is Funny channel (If)?This is a current found in the heart which possess effects which are opposite to those of most other heart currents.
It has a mixed Na+–K+ inward current activated by hyperpolarization which makes it easier for the drug to produce depolarization thereby decreasing heart rate.
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If you are digging in a 20-million-year-old fossil site in eastern Africa, which primate are you most likely to come across
Answer:
Proconsul
Explanation:
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Which process creates most of the cells in our body?
Answer:
Regeneration, Mitosis, and Meiosis.
These 3 processes involve cells dividing to make new daughter cells that repeat the process. However, regeneration only occurs when our systems are damaged and need repair by cells.
Hope this helps!
Answer:
Mitosis
Explanation:
When people say "cell division," they usually mean mitosis, the process of creating new body cells. Meiosis is the cell division process that results in the formation of egg and sperm cells. Mitosis is a necessary part of existence. 26th of March, 2021
Which best describes how mRNA is produced in a cell?
A. mRNA is made by duplicating RNA found in the nucleus.
O B. mRNA is made by DNA, using RNA nucleotides as a template.
C. mRNA is made by lining up RNA nucleotides, using DNA as a
template
D. mRNA is made by breaking apart DNA and reusing the pieces.
Answer:
B
Explanation:
mRNA is synthesized in the nucleus using the nucleotide sequence of DNA as a template.
If decomposers were removed
from an ecosystem, which of the
scenarios below would occur?
A. The number of plant species would increase
due to the increased space available.
B. The number of animals would decrease due to
the lack of plant life.
C. The ecosystem would collapse due to the lack
of nitrogen and carbon available to producers.
Answer:
Its either B or C but I would go with C
Explanation:
If decomposers were removed from an ecosystem the ecosystem would collapse due to the lack of nitrogen and carbon available to producers.
What are decomposers?" Decomposers are organisms, especially a soil bacterium, fungus, or invertebrate, that decomposes organic material."
Why are decomposers important for the ecosystem?Decomposers play a critical role in the flow of energy through an ecosystem:
They break apart dead organisms into simpler inorganic materials, making nutrients available to primary producers.Decomposer bacteria are responsible for fixing nitrogen in the soil, meaning they transform nitrogen into a form that can be used by other organisms in the food chain.Decomposition is also important because it is part of the global carbon cycle. The carbon cycle is the cyclical movement of carbon atoms from the atmosphere to the biosphere/lithosphere and back to the atmosphere.What is an ecosystem?"An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life."
What is a producer?"Producers are autotrophs, or organisms that produce their own food. Plants and algae are examples of producers."
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Define symbiotic Nutrition !!!!
Answer:
Symbiotic nutrition is the relationship between organisms in which they share their nutrition and shelter. This mutual relationship may or may not be beneficial to both partners.
Explanation:
An example of a symbiotic relationship is the mutually beneficial interaction between a clownfish and an anemone. The anemone's nematocysts, or stinging cells, protect the clownfish from predators and give clownfish pairs a safe place to lay their eggs.
A situation in which an offspring clearly expresses both phenotypes of the parents is known as
Answer:
Codominance
Explanation:
With codominance, a cross between organisms with two different phenotypes produces offspring with a third phenotype in which both of the parental traits appear together.
Please mark me the brainliest!?!
What is the smartest animal on earth?and why?
Answer: Dolphins
Explanation:
Dolphins are well-documented as intelligent animals. They can recognize themselves in a mirror and communicate with each other. Their large brain is structured for awareness and emotion, and dolphin brains are even more structurally complex than those of humans.
What is true about enzymes?
Answer:
Enzymes are proteins and they act as a catalyst
Explanation:
They bind to subtrates and turn them into products.
Which word best describes the rock’s grain shape? jagged oval round smooth.
The word that best describes the rock's grain shape is jagged.
What do you mean by the Rock's grain shape?
It significantly defines the structural arrangement of a granular mass within a rock.
In some rocks, the grain shape results from the shapes of crystals that form the rock. While in some other rocks, the grain shape results from the fragments of other rocks that can be considered as round, smooth, and sometimes jagged.
Therefore, the word that best describes the rock's grain shape is jagged.
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Answer: A
Explanation i just took the test
The percentage of total blood volume occupied by erythrocytes is called the _______ that for women has a normal range of _______. A.
Answer: the percentage of total blood volume occupied by erythrocytes. In males =47% +/-5%; females = 42%, +/-5%. About 45% of total blood volume. cytoplasmic fragments of large cells called megakaryocytes.
Explanation:
The percentage of total blood volume occupied by erythrocytes is called the hematocrit
For women have a normal range of 40±5%.
What is blood?
Blood is circulated around the body through blood vessels called arteries and veins.males have about 5 to 5.5 liters of blood.females have about 4 to 4.5 liter of blood.About 55% of blood is blood plasma.erythrocytes are about 4.7 to 6.1 million (male), and 4.2 to 5.4 million (female) blood supplies oxygen to the entire body.Plasma without clotting factor is called serum.The solid part of our blood contains red blood cells (RBC), white blood cells (WBC), and platelets.
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Tay sachs disease is caused by a mutation in the hexa gene. There are a number of mutations that are known to cause the symptoms of tay sachs. What kind of mutation is presented in this interactive?.
Tay Sachs disease is caused by a type mutation called frameshift mutation. It alters all protein sequence downstream of the mutation site.
What is a mutation?A mutation is any alteration in the genetic material (DNA) of the genome of a particular organism.
A frameshift mutation is a type of mutation capable of changing all the Open Reading Frame (ORF) of a protein, thereby altering its functional and structural properties.
Tay Sachs disease is caused by a frameshift mutation in the HEXA gene located on chromosome 15, which leads to a defective protein and faulty cellular transport of beta-hexosaminidase.
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What does having multiple alleles mean? Give an example of a human multiple allele traits.
**PLEASE HELP**
Alleles are versions of a gene that will express different qualities. Multiple alleles would mean that a gene has many variations; for example, there a multiple alleles for eye color: blue, green, brown, etc. The opposite would be a gene with just two variations; an example would be simple pea plants which can have smooth or wrinkled pods.
Hope this helps!!
Are the chemical messengers in the endocrine system that target
cells through the bloodstream
Answer:
Hormones
Explanation:
Hormones are chemical messengers in the endocrine system, and they are secreted by many types of glands, such as the pituitary gland and the thyroid gland, as well as target cells through the bloodstream, and are released into the bloodstream by endocrine glands.