Answer:
B. The membrane lets certain substances move across it freely, while others must move through a “gate”.
Explanation:
Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell. This is important for the cell to maintain its internal order irrespective of the changes to the environment. For example, water, ions, glucose and carbon dioxide may need to be imported or exported from the cell depending on its metabolic activity. Similarly, signaling molecules may need to enter the cell and proteins may need to be released into the extracellular matrix. The presence of a selectively permeable membrane allows the cell to exercise control over the quantum, timing and rate of movement of these molecules.
B. The membrane lets certain substances move across it freely, while others must move through a “gate”.
Ferns have vascular tissue, an adaptation to life on land, but they have an ancestral reproductive trait that tends to limit them to moist habitats. What is it?
Answer:
The correct answer is - flagellated sperm.
Explanation:
In ancestral trait that is flagellated sperm in ferns that were limited to moist habitat has sperms that must swim to the eggs. This is why ferns often require splashing water for the movement of sperm to points near female gametangia during reproduction.
Fern now adapted the vascular system to get life on the life and they are not limited to the water bodies, however, flagellated sperm is the ancestral reproductive trait.
The majority of nitrogen fixation happens when _____ converts atmospheric nitrogen(N2) into ammonia(NH3).
1. Fungi
2. Plants
3. Bacteria
Answer:
3.bacteria
Explanation:
The majority of nitrogen fixation happens when bacteria converts atmospheric nitrogen(N2) into ammonia(NH3).
hope it is helpful to you
The majority of nitrogen fixation happens when bacteria convert atmospheric nitrogen (N2) into ammonia (NH3). Bacteria live in symbiotic associations such as Rhizobium, but some live freely and fix nitrogen.
How is atmospheric nitrogen fixed?The atmospheric nitrogen is fixed by bacteria, which convert the atmospheric nitrogen into ammonia. There are many bacteria involved in this process.
Some bacteria live in symbiotic relationships with the roots of legume plants and capture nitrogen. Example: Rhizobium converts the nitrogen into ammonia, and the nitrogen enters living creatures when they eat the legumes. The leguminous plant makes the soil more fertile due to this process.
This process is aided by bacteria such as Azotobacter and Clostridium. Azotobacter is an aerobic bacteria, while Clostridium is an anaerobic one. The nitrogen is important for living organisms, as nitrogen is important for DNA, RNA, and protein synthesis.
Hence, Bacteria is the correct answer, as bacteria convert the atmospheric nitrogen (N2) into ammonia (NH3). option 3 is correct.
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The chart lists coordinates that describe the locations of
four cities.
City
Location
Kinshasa, Democratic Republic of the Congo 4° S/15° E
Addis Ababa, Ethiopia
9°N/39°E
Lagos, Nigeria
6°N/3° E
Oran, Algeria
35° N/0°W
Which city listed in the chart is farthest south?
Answer:
c.
Explanation:
i took the test
which of the following is the best definition of Technology?
A. the most recent electronic devices.
B. The scientific process
C. The pursuit of scientific knowledge.
D. Practice applications of scientific knoledge.
Answer:
I believe its D, technology is to make life easier with new resources, so using that definition, I think that D falls under it
Explanation:
The best definition of technology is the practice applications of the scientific knowledge. The correct option is D.
What is Technology?Technology involves the practical use of scientific knowledge to create tools, machines, and systems that improve our lives and solve problems. It is not limited to just electronic devices, but encompasses a wide range of fields including engineering, medicine, and agriculture.
Technology is the means through which we put scientific knowledge to use. It encompasses both tools (like computers) and methods (like how we make computer chips), as well as both. Although the majority of contemporary technology is electronic, this does not mean that all technology is.
While the pursuit of scientific knowledge is important, it is the application of that knowledge that defines technology.
Therefore, the correct option is D.
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Two students are making models of
cells in plants and animals. They
choose an expanding and shrinking
rubber band to show how one type of
cell acts. Which type of cell does the
A
rubber band best model?
O A. Muscle cells
O B. Epithelial cells
O C. Dermal cells
O D. Guard cells
O E. Nerve cells
HINT
SUBMIT
Answer:
A. Muscle cell because muscle are actualy the most attractive cells in the body most especially men/boyz
Type the correct answer in each box. Use numerals instead of words. If necessary, use / for the fraction bar.
The following chemical equation shows the combustion of ethane. Balance the equation by filling in the coefficients.
C2H6 +
O2 →
CO2 +
H2O
Answer:
2,7. 4,6
Explanation:
2 C2H6. +. 7O2. ==. 4. CO2. +. 6 H2O
Note. In such questions balance C first then H and finally O
It will be easier
Người ta có thể tạo ra những cơ thể mới có kg khác với dạng bố mẹ sẵn có. Em hãy đề xuất 4 cách để tạo ra cá thể như vậy
Answer:
plz ask questions in English
Where is the DNA found in Eukaryotic cells?
A. nucleus
B. rough ER
C. mitochondria
Answer:
A NUCLEUS
Explanation:
Answer:
A. nucleus
Explanation:
The DNA is found in the nucleus of the Eukaryotic cells.
Leukemia is a type of cancer that prevents a person from being able to make new blood cells. What part of the body develops this kind of cancer? O A. Kidney O B. Brain O C. Liver O D. Bone marrow SUBMIT PREVIOUS.
Answer:
D. Bone
Explanation:
Leukemia, a type of cancer found in your blood and bone marrow, is caused by the rapid production of abnormal white blood cells. The high number of abnormal white blood cells are not able to fight infection, and they impair the ability of the bone marrow to produce red blood cells and platelets.
I’ll mark as brainliest pls help!
Answer:
the answer should be rrxrr
Explanation:
a wrinkled pod is a recessive trait which is represented by "r"
When he discovered that blood is pumped from the heart to the body, and back to the heart, ________ had a difficult time getting people to accept his discovery because it went against the ancient teachings of _______.
Answer:
1 - William Harvey
2 - Galen
Explanation:
Galen, who postulated that blood was produced continuously in the liver and absorbed by the body (not recirculated), served as the Roman emperor's personal physician. For 1500 years, his theories about human anatomy went unquestioned until Harvey's proposal in 1628.
When he discovered that blood is pumped from the heart to the body, and back to the heart, William Harvey had a difficult time getting people to accept his discovery because it went against the ancient teachings of Galen.
What is the composition of blood ?blood is a fluid connective tissue contain blood cells and an plasma.
The major functions include transportation and providing immunity and protection.
The major components include plasma primary constituent of blood contain 55 percent of blood volume. It is made up of water, salts, proteins, and blood cells.
Red Blood Cells which determine blood type, biconcave in shape, enucleated contain millions of hemoglobin molecules.
White Blood Cells act as defensive cell in the immune system and lymphatic system against infection.
Platelets are formed from pieces of cells present in the bone marrow called megakaryocytes.
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In which process do homologous chromosomes pair up?
A. Mitosis
B. Meiosis
Answer:
the answer is meiosis
Explanation:
in miosis it happens in prophase I.
Answer:
B. Meiosis
Explanation:
Homologous chromosomes pair up in meiosis.
An example of a communicable disease is
Answer:
An example of a communicable disease could be influenza. A communicable disease is just a disease caused by virus or bacteria that spreads from person to person.
I need help with this please !!
What were some number of possible solutions to air pollution?
The end product(s) of the light-independent reactions of photosynthesis is/are - Select all that apply.
1.Glucose
2.ATP
3.Oxygen
4.Carbon dioxide
Answer:
Glucose
Explanation:
The light dependent stage produces oxygen while the light independent stage produces glucose ( a carbohydrate)
Oxygen and glucose are the two products of photosynthesis.
Which of the following best describes the difference between an adaptation and adapting?
Answer:
Explanation:
Adaption and adaptation are different forms of the same word, and they share all their meanings, which include (1) the act of changing to suit new conditions, and (2) a work of art recast in a new form or medium. But the longer word, adaptation, is preferred by most publications and is much more common
Answer:
C
Explanation: I took the ape x quiz
Plants also use cellular respiration
A. True
B. False
Answer:
A. True
Explanation:
Yes, the plants use cellular respiration. So, option (A) is the correct answer.
why people living in high altitude have level of RBC?
Answer:
Scientists have long known that the body adjusts to the oxygen-deprived conditions of high altitudes. ... The traditional explanation has been that low-oxygen conditions cause the body to build new red blood cells, making it easier to supply oxygen to muscles and vital organs.
Answer the following questions in your own words and in 3-5 complete sentences.
1. Where are the highest concentrations of the current population of Palmer amaranth?
2. Based on the climate model, how will the range change by 2050?
3. What do you think this change will mean for Palmer amaranth populations?
industrial preparation of oxygen from liquify air
Scientists are reluctant to say that any theory is absolutely true. Why do you think that is? I
Answer: Because more and more is discovered about the world everyday and they don’t want to be wrong.
Explanation:
PLEASE HELP ITS URGENT 15 POINTS !!!!
Answer 3. A-b
Answer:
a) I b)i) 2
Explanation:
What type of vegetable is a mushroom?
Answer:
Although mushrooms are classified as vegetables, technically they are not plants but part of the kingdom called fungi. However, they share some characteristics with plants and, as you will find out, even with animals! Mushrooms are low in calories, have virtually no fat and no cholesterol, and are very low in sodium.
Explanation:
MARK AS BRAINLY
Answer: not vegetable
Explanation: have no leaves, roots or seeds and don't need light, so they're not a true vegetable
In which process does crossing over occur?
A. Mitosis
B. Meiosis
Answer:
B. Meiosis
Explanation:
Crossing over occurs in meiosis.
On the diagram - label ALL the nitrogen bases not
already labeled (A, T, C or G)
LITTL
can someone help?
Explanation:
I hope the diagram will help remember A always pairs with T and C always pairs with G. u can also remember as Apple Tree and Car Garage. :)
Deforestation occurs when a forested area is converted into a non-forested area. This conversion could be due to the need for construction or expansion of a town, the creation of farmland, or logging.
How would deforestation likely affect an area?
Answer:
the animals of the forested area will eventually come in the town.
Explanation:
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The number of chromosomes remains the same in what
Mitosis
Thus, in the Mitosis cell division, the two resulting daughter cells always contain the same number of chromosomes as the parent cell from which they derive.
What are 2 functions of carbohydrates?
A. Carbohydrates are used to store energy and store information in living things.
B. Carbohydrates are used to store energy and provide structure/support in living things.
Answer:
In Short The correct answer is B...
Explanation:
Here are most of the functions of carbohydrates altogether:
Provide instant energy to the body. :This appears to be the primary function of carbohydrates in the body. ...
Reserve food: Carbohydrate is also stored as the reserve food in the body. This is a precautionary measure for the body to cope up in times of hunger.
Carbohydrates form other biomolecules.
Detoxification of the body by metabolism
Carbohydrates participate as reaction intermediates in some vital reactions. This function of carbohydrates is seen extensively in various cellular reaction.
For example, one of the vitamins, Vitamin B2 also called Riboflavin has a ribose sugar moiety. This ribose is a four carbon type of carbohydrate monomer by its chemical structure. It is involved in vital reactions at the organ and cellular level. Similarly, carbohydrates are also chemical constituents of many hormones, vitamins, enzymes, etc.
Carbohydrates form a part of DNA and RNA in the form of deoxyribose and ribose sugars. These are five carbon monosaccharides formed form heptulose sugars by the pseudo-heptulose pathway.
They are constituents of all the cellular organelles. Carbohydrates are also components of cell organelles like the cell membrane, mitochondria, nucleus, endoplasmic reticulum, etc. They provide structural integrity, mechanical strength in combination with proteins and lipids. They help make up the body mass by being included in all the parts of the cell and tissues. For example, in cell membranes, there are two constituents, i.e., glycolipid layer and glycoprotein layer. Here the term “glyco” is a carbohydrate.
8. Transport of oxygen: Glucose is taken by red blood cells. These are the types of blood cells which lack mitochondria and other cell organelles required for producing energy. In such a case, the ATP is produced by a non-oxidative pathway with the end product as lactose and ATP.
This energy thus produced is necessary for hemoglobin to bind to oxygen molecules. These bound oxygen molecules are transferred from lungs to the different tissues.
9. Aid in gut motility: Our diet has carbohydrates in greater proportions because, it aids in bowel movement. When you suffer from constipation, doctors first prescribe you bran and other carbohydrate material like Ispaghula. The carbohydrates in these material is in the form of fibrous material. When they are ingested, their material absorbs water in the guts, swells and increases the load.
This load is useful to increase intestinal motility and expulsion of waste (feces). Thus carbohydrates help clear gut and prevent constipation. Hence, when you feel constipated, have banana fruit and notice the change.
They play a role in other physiological roles. Since they are components of many bio-molecules, they have further roles in body physiology. They have a role in blood clotting, immunity, fertilization. Thus they take part in many physiological reactions.
Answer:
B. Carbohydrates are used to store energy and provide structure/support in living things.
Explanation:
The two functions of carbohydrates are to store energy and provide structure/support in living things.
Who were the scientists that came up with the shape of DNA?
Watson and Crick
Crook and Brown
O Gregory and Mendel
7
O None of the above
This is how zirconium appears in the periodic table
Rounded to the nearest whole number, how many electrons are in an atom of zirconium?
40
51
91
131
Answer:
40
Explanation:
It's right I just took the test on Edge.
Please give me brainiest. Thank you
