Answer:
I think the answer is 3.5%
Explanation:
35 parts per thousand of seawater contains salt therefore your answer is 3.5
8. Analysis of a basalt rock sample shows that 12.5% of its radioactive potassium-40 remain undecayed.
How old is the basalt?
Which of these is not a human cause of extinction of species?
Choose the correct answer.
A) Clearing of an area for farmland.
B) A dam built in a river for city water usage.
C) Competition for food resources with another native species.
D) The introduction of a new predatory species to an island by boat.
The statement that does not represent a human cause of the extinction of species is the competition for food resources with another native species. Thus, the correct option for this question is C.
What is species?Species may be characterized as a group or collection of organisms that can significantly reproduce with one another in nature in order to produce fertile offspring. The process of speciation is generally mediated through the species.
In the present time, the human causes of the extinction of species are majorly popular. It includes the clearance of an area for farmland and industrialization, the building of a dam for city water utilization, the introduction of a new predatory species to an island by boat, and many more.
But the process of competition for food resources with another native species is ultimately the behavior governed by the respective species itself without the interference of humans.
Therefore, the statement that does not represent a human cause of the extinction of species is the competition for food resources with another native species. Thus, the correct option for this question is C.
To learn more about Species extinction, refer to the link:
https://brainly.com/question/1027555
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Control-part of the body that determines what to do with the information about the change in setpoint (I will give brainliest)
Answer:
Hypothalamus
Explanation:
The hypothalamus is involved in different daily activities like eating or drinking, in the control of the body's temperature and energy maintenance, and in the process of memorizing and in stress control. It also modulates the endocrine system through its connections with the pituitary gland.
Huntington’s disease (HD) is prevalent South Africa. Most of the families with HD have Dutch or British ancestry, which suggests they inherited the European HD allele. HD is believed to have first arrived in South Africa more than 300 years ago when Dutch colonists settled into the Western Cape in the 1600s. Thus, the prevalence of HD in South Africa is the result of the founder effect.
Mutations in the HTT gene cause Huntington’s disease. The HTT gene provides instructions for making a protein called huntintin. This protein plays a role in nerve cells in the brain. The HTT mutation that causes HD involves a DNA segment known as a CAG trinucleotide repeat. This segment is made up of a series of three DNA building blocks that appear multiple times in a row. Normally, the CAG segment is repeated 10 to 35 times within the gene. In people with HD, the CAG segment is repeated 36 to more than 120 times. An increase in the size of the CAG segment leads to the production of an abnormally long version of the huntintin protein. This causes the dysfunction and eventual death of neurons in certain areas of the brain. The more repeats, the more serious the disease is.
HD is inherited in an autosomal dominant pattern. There is both an adult onset (after reproductive age) and a juvenile onset pattern. People with adult onset typically have 40 to 50 repeats, while people with the juvenile form tend to have more than 60 repeats. Individuals who have 27 to 35 repeats do not develop HD, but they are at risk of having children who will develop the disorder. As the gene is passed on to offspring, the size of the repeat may lengthen into the range associated with HD.
Predict what will happen to the allele frequencies for Huntington’s disease in South Africa if there were a new mutation to the HTT gene that causes a reduction to the CAG trinucleotide repeat. Justify your prediction with evidence. Your response should include links to the sources of information gathered.
Explanation:
Predict what will happen to the allele frequencies for Huntington’s disease in South Africa if there were a new mutation to the HTT gene that causes a reduction to the CAG trinucleotide repeat. Justify your prediction with evidence. Your response should include links to the sources of information gathered.
Is there a way to investigate whether our predictions about genotypes are accurate?
Answer:
Test Crosses. A test cross is utilized to decide the genotype of a person with a attribute.
Explanation:
Brainliest?
The products or photosynthesis are carbohydrates and oxygen. Which process uses these substances as reactants?
Answer:
Respiration is the correct answer. Respiration process that occurs in the presence of oxygen is called aerobic respiration, generally seen among humans.
Explanation:
Most geologists think that the movement of Earth’s plates is caused by ____.
a. Continental Drift
b. Conduction
c. Convection Current
Answer:
convection currents
Explanation:
continental drift is a result of earth's moving plates. so it's convection currents
As the lock for the door opens you enter another room. This one has plain cement walls with huge silver and copper pipes running from floor to ceiling. The room reminds you of a basement mechanical room even though you have just gone upstairs. Everywhere there are old wooden crates and piles of gears of all sizes, springs, gages and the hands of old clocks. As you gaze around the door you just entered closes and will not open. (and even if it would you are not sure of what has happened to the Antique Dealer and maybe there is some danger that way.) Someone in the group checks their phone but there'is no signal. Maybe all this cement and metal is blocking your signal. Next to another door is an interesting framed collage made of miscellaneous gears and pieces.
A safe room can be the difference between life and death during a home invasion. While a home security system is extremely important for immediately contacting law enforcement, a safe place for anyone inside to wait for the police is necessary. It can always be a great place to store valuables that you do not regularly use, like having
Plz I need help I will give you 50 points
Answer:
what is the name of this website or the book
please tell me
Answer:
ok so lets elimnate we already have tips on how to save thanks to our teacher/classmates and even if we didnt we can look them up and there baiscly all the same thing so A is out. answer B is pretty good so we will wait to the end C is common sense i dont tink it would that because the teacher is giving us 2 months and u pay rent every 1 month so thats out so that leaves u with B and D. i personally i think its D but usally rent stays the same for each month unless the person who owns building charges u more which they tell you about
Explanation:
Why might parents who don't show the trait of albinism have children who do?
Answer:
This trait is rare when it occurs. Some genes depend on other genes to be expressed, so in most cases a trait is denied an expression. But its still there, so it passes down to generation until it gets expressed.
Explanation:
Answer:
Because it's a recessive trait
Explanation:
There are two chromosomes that determine your biological sex: XX for the female and XY for the male. You inherit one X chromosome from your mother and one X or Y chromosome from your father, which is what determines your sex.
A certain inheritable genetic condition can be recessive or dominant. If it's dominant, it shows even if just one chromosome carries that condition. If it's recessive, it has to be in both ones (or just the x one or just y if you're male. That's why some conditions, such as daltonism, affect men more that women).
For example, blue eyes are a recessive trait, brown eyes are a dominant trait. If your parents are both blue eyed, you will surely have blue eyes as well. The same can't be said if both of your parents have brown eyes: they might still be carrier of the blue eyed trait (both of them have to), in which case you would have a 25% chance (1/4) to have blue eyes (½ to inherit the carrier chromosome from your mother; ½ from your father). The same can be said about albinism
Agriculture is the main sources
lincome of Nepal Justify
this statments
give me long answer
Answer:
Agriculture is the mainstay of the economy, providing a livelihood for more than 70% of the population and accounting for a little over one-third of GDP,” according to the CIA. “Industrial activity mainly involves the processing of agricultural products, including pulses, jute, sugarcane, tobacco, and grain.
How does E. Coli disrupt homeostasis
How many electrons fill each of the orbital levels in the diagram below?
Compare the concentration of connective tissue cells found in bone with the concentration of those found in blood.
Answer: CONNECTIVE TISSUE is the most abundant tissue in the body which are widely separated from each other and intercellular substance (matrix) is present in considerably larger amounts. The principal cell of connective tissue are fibroblasts which makes fibres found in almost all connectiv tissues. Some are solid and strong (bone), while others are fluid and flexible( blood).
Explanation:
Connective tissues usually contain fibres present in the matrix which may be of semisolid jelly-like consistency or dense and rigid, depending upon the position and function of the tissue. There are three main types of connective tissue which include:
--> Loose connective tissue
--> Dense connective tissue and
--> specialised connective tissue.
The bone and the blood are considered to be an example of specialised connective tissue. This is so because they both contain a number of different tissues with specialized cells and unique ground substances.
The BONE consists of osteoblasts, osteocytes, and osteoclasts. It is considered to be a specialised connective tissue because the bone cells are surrounded by a matrix of collagen fibres strengthened by inorganic salts, especially calcium and phosphate.
The BLOOD consists of red blood cells, white blood cells, platelets. It is considered to be a specialised connective tissue because the blood cells are surrounded by fluid matrix known as plasma and connecta with other cells through its transport functions.
In COMPARING the concentration of connective tissue cells or bone and blood, the connective tissue cells of bone comsist of fibre and collagen which makes it dense and rigid while the connective tissue cells of blood does not contain any fibre, therefore it's flexible.
What are two external conditions that must be
met for a seed to sprout?
Answer:
Temperature, water and oxygen.
Explanation:
There are 3 answers yes, but any 2 of them should work.
Answer:
I will give all the external conditions, you can choose 2 of them <3
Explanation:
All seeds need water, oxygen, and proper temperature in order to germinate. Some seeds require proper light also. Some germinate better in full light while others require darkness to germinate. When a seed is exposed to the proper conditions, water and oxygen are taken in through the seed coat.
I suggest you choose water and oxygen
Have a great day!
In response to a decrease in tissue metabolic activity, tissue oxygen concentrations ________, which causes a(n) ________. In response to a decrease in tissue metabolic activity, tissue oxygen concentrations ________, which causes a(n) ________. increase : active hyperemic response decrease : dilation of the arterioles decrease : increase in tissue ischemia decrease : active hyperemic response increase : constriction of the arterioles
Answer:
The correct answer is - increase: constriction of the arterioles.
Explanation:
When the physical activity is decreased by the tissues of the muscle, the oxygen concentration in the tissue increases which leads to the constriction of the arterioles.
It takes place in order to decrease blood flow and blood pressure as oxygen requirement is less in the tissue in decreased physical metabolic activity. The constriction of arterioles results in more resistance to decrease the blood flow in capillaries.
A student is given a tissue sample to examine under a microscope . Which of the following would be evidence that the tissue sample she's examining is from a plant?
1. Prokaryote , cell wall
2.Eukaryote, cell membrane, presence of mitochondria
3. Prokaryote , cell membrane , presence of a flagellum
4. Eukaryote , cell wall , presence of chloroplasts
5 countries with Very low undernourishment
Answer:
NIGERIA
AFGHANISTAN
CHAD
TIMOR-LESTE
MADAGASCAR
Explanation:
Describe an example of analogous structures. What additional evidence would help you show that these structures are not homologous?
Answer:
The wings of birds and bats.
Explanation:
The wings of birds and bats is the example of analogous structures. Analogous structures refers to those structures that are similar in those organisms that are unrelated or different to one another. The wing structures are similar in both birds and bats because they are evolved to do the same job which flying. It is not evolved because they were inherited from a common ancestor. These wing structure of both bat and bird look similar from the outside but internally they are totally different from one another.
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Answer:
a ????
Explanation:
●Which of the following increases the amount of carbon dioxide in the atmosphere?
→ c. increased usage of fossil fuel.
may this helps you
bye
A list of different ions is shown. Which combination of ions will result in an ionic bond?
Na+
02-
S2
F
SO
NaF
NaO2
LiNa
Answer:
NaF
Explanation:
NaF is an ionic compound because Na gives an electron to F, causing it to become Na+ and F to become F-
The government wants to set new regulations that prohibit chlorofluorocarbons (CFCs) use in aerosol sprays and refrigerants. How will this act help with the sustainability of our environment?
Answer:
The new regulation will help reduce the amount of green house gases available in the atmosphere thereby saving our environment from the Green house effect
Explanation:
Chlorofluorocarbons are examples of greenhouse gases which contribute to the Green house effect been experienced in our environment, by destroying the earths' Ozone layer
If the Government sets a new regulation that prohibit its use in sprays and refrigerants it will help reduce the amount of green house gases available in the atmosphere thereby saving our environment from the Green house effect
Answer:
that act will help the sustainability of out environment because : C. It will slow down the degradation of the ozone layer
The usage of CFC will crate chlorine atoms that catalyze ozone degradation. By prohibiting this product, Government will slow down Ozone's degradation
hope this helps
La división celular sucede en 2 fases, en primer la lugar la división del ______________ y después la división del __________________ *
What are some ways that natural selection equips organisms for survival in their environment?
Answer:
Well organisms who have traits that are beneficial to them and would make them live long enough to usually reproduce, it would become an adaptive trait. That organism who has that trait will most likely live the longest and reproducing which will pass down their traits. Other same type of organisms who don’t have that trait will most likely die quicker then those who do and they won’t be able to pass on their genes which will lead to the natrual selection being very few of those types. If your born with a non useful trait, you jsut pass it down, you can’t just have the ones that benefit you unless yoru parents have it. This is why at the ”end” there will be more with useful traits and barley any with non.
The level of carbon dioxide in the blood is monitored by nerve tissue. If you exercise strenuously, the increase in cellular respiration consumes oxygen from the blood and produces surplus carbon dioxide removed in the blood. Since this physical exertion requires faster breathing to replenish oxygen supplies and carry away carbon dioxide, the carbon dioxide sensors result in signals from the brain to increase breathing rate. After you have rested, and carbon dioxide levels are back to normal, your breathing rate decreases too. This is an example of
Answer:
Negative feedback.
Explanation:
The normal carbon dioxide levels after resting, the breathing rate also decreases which is an example of negative feedback because the body moves towards stability or equilibrium conditions. There is a direct relationship between breathing rate and carbondioxide levels means if one is increases the other automatically increases in order to maintain homeostasis in the body so we can say that this relationship is very important to maintain .stability in the body
In all reptiles, birds, and mammals, the processes of excretion, water and salt balance,
and the regulation of pH in body fluids are controlled by the kidneys. This is an example
of the organism maintaining
a. reabsorption
b. homeostasis
c. insulation
d. hibernation
Organisms that live in the tundra have developed unique adaptations that aid in their survival. Ursus maritimus has a variety of adaptations which enable it to survive in the tundra. It is the largest terrestrial carnivore, but it is also an excellent swimmer that spends much of its time in and near the water hunting its favorite food. It has large paws with small bumps to provide traction as it walks across the ice. Its fur is helpful as camouflage during the winter months, but not as helpful during the summer. Which organism has the adaptations described that enable it to survive in the tundra
Answer: The organism that has the adaptations described that enable it to survive in the tundra is the POLAR BEAR.
Explanation:
ADAPTATION is defined as the process by which an organism becomes fitted to its environment thereby enabling the organism to live successfully and reproduce.
In any population, an organism is able to survive if it has features that help them to fit and compete successfully in that environment.
From the question, a typical example was given concerning the POLAR BEAR (Ursus maritimus) and it's best fitted environment which is the tundra.
The tundra is a type of biome that is treeless marshy vegetation which is composed mainly of dwarf shrubs. It's has a cold climate (Arctic region) with long icy winters and very short summer with an average temperature of 10°C.
Ursus maritimus has a variety of adaptations which enable it to survive in the tundra. These adaptations include:
--> The presence of a thick coat of insulated WHITE FUR: this helps it to survive the cold environment by acting as an effective insulator. The fur is also found at the base of its large paws with small bumps, which protects it against cold surfaces and provides its with a better grip of ice as it walks across it. It also gives it a concealing coloration making it unnoticed while it stalks its prey in the snow. These are the features that enables it survive the terrestrial environment if tundra.
--> it also has some aquatic adaptations which enables it to hunt it's favourite food which is seals. The presence of large front paws which are slightly webbed allows them swim for a long distance in search of food.
Answer:
c polar bears
Explanation:
got it right edg 2021
What types of light can plant cells absorb? Select 3 answers to get this correct.
1. How can embryology be used to explain evolution?
2. What are fossils? How are fossils used to explain evolution?
Answer: 1. Embryology, the study of the development of the anatomy of an organism to its adult form, provides evidence for evolution as embryo formation in widely-divergent groups of organisms tends to be conserved. ... Another form of evidence of evolution is the convergence of form in organisms that share similar environments. 2. Fossils are the preserved remains or traces of animals, plants, and other organisms from the past. Fossils are important evidence for evolution because they show that life on earth was once different from life found on earth today. mark brainliest
Explanation:
What is the casparian strip located?
Answer:
on the front of the caprisun duh
Explanation:
