Which of the following best describes a feature of the cell membrane's structure that allows molecules such as oxygen and hydrocarbons to easily cross the membrane and enter the cell?
a. The bilayer contains mostly polar molecules.
b. The interior of the lipid bilayer is hydrophobic.
c. The bilayer is embedded with transport proteins.
d. The exterior of the lipid bilayer is unsaturated.
Answer:
The interior of the lipid bilayer is hydrophobic (Ans. B)
Explanation:
The plasma membrane is selective in nature some of polar molecules and hydrophobic molecules can pass through the lipid bilayer of the cell membrane, large polar molecules and ions cannot pass through it.
By active and passive transport integral membrane proteins enables large polar molecules and ions to pass through the membrane. 3 primary factors which determine weather a molecule can diffuse through a membrane or not are : Size, Concentration and Charge.
All scientific ___________ must be based on careful and rational examinations of the facts. hypothesis laws theories inquiries
Answer;
Theories
All scientific theories must be based on careful and rational examinations of the facts.
Explanation;
-A scientific theory is a series of statements about the causal elements for observed phenomena. A critical component of a scientific theory is that it provides explanations and predictions that can be tested.
-A good scientific theory is formed from a number of hypotheses that can be tested independently. It should also consists of a limited number of problem-solving strategies that can be applied to a wide range of scientific circumstances.
describe the role of proteins in the release of energy stored in ATP
The role of proteins in the release of energy stored in ATP is that protein is the holder of ATP that is broken down.
What are proteins?Proteins are big, complex molecules that perform numerous important functions in the body. They are essential for the structure, function, and regulation of the body's tissues and organs and do the majority of the work in cells.
Proteins are also used in the synthesis of ATP. Other than proteins, glucose, and fats synthesize energy. Proteins break down the bonds in ATP to release energy. Proteins can either form pyruvate or Acetyl Co-A and participate in aerobic respiration to produce ATP.
Therefore, proteins play a part in the release of energy held in ATP by acting as the keeper of the ATP that is broken down.
To learn more about proteins, refer to the link:
https://brainly.com/question/17095120
#SPJ2
For a given species, an increased evolutionary rate would cause a decrease in A) biodiversity. B) fitness of a species. C) similarity of the individuals in the species. D) the number of new genes in the DNA of the species.
Answer: C) similarity of the individuals in the species
Explanation: Similarity of the individuals in the species. It would be expected that increased evolutionary rate would cause individuals in the species to resemble each other less.
What did robert koch discover by using the compound microscope?
The general formula for a synthesis reaction is what
Answer:
a+b--> ab
Explanation:
a p e x :)
when a hydrocarbon chain is bent, it is called ____
state the numbered position of the moon that could result in a lunar eclipse
Final answer:
A lunar eclipse occurs when the Moon enters the Earth's shadow during its full phase when the Sun, Earth, and Moon are aligned.
Explanation:
A lunar eclipse occurs when the Moon enters the shadow of Earth. This event can only happen when the Sun, Earth, and Moon are precisely aligned, meaning the Moon has to be in its full phase. During a lunar eclipse, if you imagine the Earth's dark shadow as a numbered area, the Moon must be in the number corresponding to the darkest part of the Earth's shadow. This is a necessary condition for a lunar eclipse to occur and for the phenomenon to be observable from Earth.
An eclipse of the Moon, also known as a lunar eclipse, can occur when the Sun, Earth, and Moon are in a line. The Moon enters the shadow of the Earth, causing it to darken. The numbered position of the Moon that could result in a lunar eclipse is position 1, where a total eclipse occurs.
why it is important to study the menstrual cycle
Answer:
1. To maintain health and fitness
2. Helps know the fertile period
3. To be more productive
4. Improve the life of husband and wife
Explanation:
1. To maintain health and fitness
In the second week after menstruation is finished, increasing estrogen in the body will provide lots of energy when exercising. The body will be able to burn more bad fats and calories.
2. Helps know the fertile period
In planning a pregnancy, this will be very helpful. Most women will reach the peak of fertility between 12 to 16 days before menstruation. It also can be seen that the most infertile period is the days after the menstrual period is finished or ended.
3. To be more productive
What is meant here is that women will be more productive at work. According to Dr. Harper, women tend to feel more productive during the 2-week monthly period.
4. Improve the life of husband and wife
In the second or third week of the menstrual cycle, women's testosterone and estrogen levels will increase so that it is easy to reach an intense climax. So this time is the right time to build a romantic atmosphere in the room
Learn More
About the purpose of the menstrual cycle https://brainly.com/question/4070171
Details
Class : Senior High
Subject : Biology
Keywords
- Menstrual Cycle
The pictures below show a cave and a geyser.
Which of these statements is correct about the cave and geyser shown in the pictures?
a. Both are formed when groundwater gets heated.
b. Both are formed when groundwater reacts with the limestone in rocks.
c. The cave is formed when groundwater reacts with the limestone in rocks and the geyser is formed when groundwater gets heated.
d. The cave is formed when groundwater gets heated and the geyser is formed when groundwater reacts with the limestone in rocks.
Answer:
c
Explanation:
what form of carbon do plants remove from the air?
Considering only personal water use, people in the developed world use about _____ than people in the developing world
When we consider personal water use, people in developed countries use more water compared to those in developing countries.
How is water usage in developed countries different from developing countries?In a developed country like America, the average water use by a family is about 552 gallons comparing it to an African family which uses about 5 gallons of water every day. In developing countries, women have to walk about 4 miles to fetch water. An average person needs 20 to 50 liters of water each day for cooking, cleaning, drinking, and sanitation.
Water is one of the most important resources for human health, environmental protection, poverty alleviation, sustainable development, peace and security. Yet, more than 40% of people worldwide lack access to clean water.
Water scarcity affects several sectors, such as food security. About 70% of global freshwater is used by agriculture. Water scarcity, flooding, and water quality are the primary causes of water-related diseases in developing countries. In the developing world, water-related illnesses account for up to 80%.
To learn more about water use in developed countries, refer to the link:
https://brainly.com/question/28208556
#SPJ2
What type of channel is responsible for the initial changes in the membrane potential of the hair cells, which ultimately determines the cochlear nerve response to sound?
Which of the following is an indicator of good water quality?
High levels of nitrates
High levels of phosphates
All of the above
Zero turbidity
I would think that it is B. Nitrates can be a form of pollution and D is usually from the speed of the water moving.
Answer:d
Explanation:took test
Students on a field trip to a potato farm examine a few potatoes. Which of the following features will help them conclude that the potato is an underground stem? the presence of a swollen portion indicating food storage, which is a function of stems the presence of fine roots that develop into new plants the presence of buds located in the potato eyes, which represent the nodes
The presence of buds located in the potato eyes, which represent the nodes, will help the students conclude that the potato is an underground stem. Each 'eye' of a potato is a node where a new shoot could emerge, indicating its stem nature.
Professor Whitney has a sample of lead and a sample of iron. The samples have equal mass. When Whitney heats the samples, the lead reaches a higher temperature than the iron, even though both samples absorbed the same amount of thermal energy. What can Whitney conclude from this experiment?
Iron is a better conductor of heat than lead.
Lead is a better conductor of heat than iron.
Lead has a higher heat capacity than iron.
Iron has a higher heat capacity than lead.
Answer:
The correct answer would be "Iron has a higher heat capacity than lead".
Heat capacity can be defined as the amount of heat transferred required in order to raise the temperature of an object by 1°.
The higher the heat capacity the more the heat transfer is required to raise the temperature.
Iron has higher heat capacity as compared to the lead due to which it requires more heat transfer to raise the temperature of the iron as compared to the lead.
It is why the temperature of the lead increases more as compared to iron even though they absorbed the same amount of thermal energy.
Answer:
The correct answer is "Iron has a higher heat capacity than lead."
Explanation:
Hope this helps.
Fertilization occurs when _____. an organism clones itself two gametes come together and chromosomes combine binary fission takes place gametes are produced
Answer: the correct answer for the fill in the blank is- Gametes come together and chromosomes combine.
Fertilization is a process in which sex cells ( also called male and female gametes that are haploid) are fused together and form zygote ( diploid) that eventually develops into new organism.
There are two types of fertilization that is internal ( inside the body) and external fertilization ( outside the body).
Q:Suppose the human gene coding for hemoglobin is inserted into a bacterial plasmid. A bacterial culture is transformed with the recombinant plasmid. Which of the following statements will be true?
A.The bacteria will not survive.
B.The bacteria will produce only human hemoglobin.
C.The bacterial will produce human hemoglobin and its own bacterial proteins.
D.The bacteria will produce human hemoglobin and other human proteins.
What does it mean if a scientist fails to reject a hypothesis?
Which best describes the life cycles of moss and angiosperm?
I. Both life cycles have protected seeds.
II. Both life cycles involve meiosis.
III. Moss fertilization occurs in the air; angiosperm fertilization occurs in a pool of water.
IV. Moss release haploid spores into the surrounding environment; angiosperm release haploid pollen grains into the surrounding environment.
Ans. Option (IV).
Mosses can be defined as non-vascular, flowerless plants that are found in shady or damp regions and reproduce via haploid spores. During reproduction in moss, haploid male gametes or spores are released into surrounding environment that fuse with female spores to form zygote that develop into mature sporophyte.
Angiosperms are vascular, flowering plants that reproduce by seeds. During reproduction in angiosperms, haploid male gametes or pollen grains are released into surrounding environment that fuse with female gametes or eggs to form zygote that develop into seed.
Thus, the correct answer is option (IV).
Answer:
D
Explanation:
A biologist observes that ocean temperature decreases with increasing depth and concludes that deep sea creatures are superior animals because they can survive in harsher environmental conditions. Why is this an invalid scientific conclusion?
A. The data was not compared among several sampling sites.
B. The data did not specify the measurement system used.
C. Scientific data cannot be used to make judgments of organism superiority.
D. Scientific data cannot be used to measure temperatures that are inaccessible to humans.
What do eukaryotic cells have that prokaryotic cells do not? A.Cell membranes B.DNA C.Cytoplasm D.Membrane-enclosed organelles
Answer:
The answer is D.Membrane-enclosed organelles
Explanation:
Eukaryotic cells have a cytoplasm organized in compartments, with separate or interconnected organelles, limited by biological membranes that have the same nature as the plasma membrane. In the nucleus is the genetic material in the form of chromosomes, where all the necessary information is given so that all the processes both intracellular and outside the cell are carried out.
Eukaryotic cells are more complex than prokaryotic cells and contain various membrane-enclosed organelles, such as the nucleus, mitochondria, endoplasmic reticulum, Golgi apparatus, and others. The correct answer is D. Membrane-enclosed organelles.
These organelles perform specific functions within the eukaryotic cell. Prokaryotic cells, on the other hand, lack membrane-bound organelles and have a simpler internal structure. They do have cell membranes, DNA, and cytoplasm, which are also present in eukaryotic cells.
Eukaryotic cells have the additional feature of membrane-enclosed organelles, which provide them with compartmentalization and specialization of cellular functions, whereas prokaryotic cells lack these organelles and have a more simplistic internal structure.
Therefore, the correct answer is D. Membrane-enclosed organelles.
For more details regarding eukaryotic cells, visit:
https://brainly.com/question/982048
#SPJ6
Which statement best summarizes "Save the Coral Reefs”?Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Development along the coastal regions has significant negative effects on coral reefs. The reefs are an essential part of the ocean’s ecosystem, and when people build structures on top of them, they are easily damaged because they are so fragile.
Answer;
-Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Explanation;
-Coral reefs are important for many different reasons aside from supposedly containing the most diverse ecosystems on the planet.
-They protect coastlines from the damaging effects of wave action and tropical storms ( they provide a buffer, protecting our coasts from waves, storms, and floods, helping to prevent loss of life, property damage, and erosion) and also provide habitats and shelter for many marine organisms.
Answer:
Coral reefs are a very important component of the ocean’s ecosystem because they support sea life, such as crabs and sea turtles. In fact, over four thousand species depend on the survival of the reefs, which are being destroyed by bleaching. More must be done immediately to save the reefs.
Explanation:
the gene is located at a specific site on a(n) ______ strand
A. DNA
B. QRS
C. RNA
D. tRNA
A. DNA
;;;;;;;;;;;;;;;;;;;;;;;;;
A prokaryote is most likely to use which of the following modes of metabolism to release energy if it is in an environment without oxygen, dies when exposed to oxygen, and uses fermentation?
A. Photoautotroph
B. Facultative anaerobe
C. Obligate anaerobe
D. Heterotroph <---- is the right answer
list three things we can measure in our body
Imagine that a chromosome contains the following chromosome order ZYXWVUT. What type of mutation happens to produce ZYXWWVVUT?
The animals in the food web release _____ into the enviroment , which plants then use for ______ ?
mitosis is done by your body cells this cartoon illustrates and exception what types of cells do not undergo mitosis
Most cells in the human body reproduce using mitosis, however, sex cells (or gametes) like sperm and egg cells do not. They are produced through a different cell division process called meiosis, which results in cells with half the number of chromosomes, facilitating genetic variation in offspring.
Explanation:In the human body, most cells reproduce using a division process known as mitosis. However, there is one type of cell that does not undergo mitosis: sex cells or gametes. These cells, specifically sperm and egg cells, are formed through a different cell division process called meiosis.
In meiosis, the resulting cells have half the number of chromosomes than the original cell allowing genetic variation in offspring. While in mitosis, the resulting cells are genetically identical to the original cell, maintaining the same number of chromosomes. This is why mitosis is used for growth and repair in the body, and meiosis is used for sexual reproduction.
Learn more about Cell Division here:https://brainly.com/question/34653200
#SPJ6
Explain why the chromosomes in the second drawing have sister chromatids, but the chromosomes in the third drawing do not. What happened to the sister chromatids?
The chromosomes in the second drawing have sister chromatids because DNA has replicated during the S phase of interphase, resulting in two identical copies that are joined at the centromere. By the third drawing, the sister chromatids have likely separated during anaphase, making them individual chromosomes.
Explanation:The chromosomes in the second drawing have sister chromatids because during the S phase of interphase, DNA replication occurs, which results in each chromosome being composed of two identical copies. These copies, called sister chromatids, are joined together at a region known as the centromere and are visible under a light microscope in the familiar "X" shape. The absence of sister chromatids in the third drawing is likely due to the chromosomes having moved into a stage of cell division known as anaphase, during which the sister chromatids are pulled apart toward opposite poles of the cell, thus no longer existing as attached pairs but as individual chromosomes.
Because second drawing twins (chromatids) separate in phase three, becoming solo chromosomes.
Here's why the chromosomes in the second drawing have sister chromatids, but those in the third drawing don't:
Second Drawing:
* The chromosomes in the second drawing have sister chromatids because they are in the prophase stage of cell division. In prophase, DNA replication has already occurred, resulting in each chromosome being duplicated. These two identical copies stay attached at the centromere and are called sister chromatids.
Third Drawing:
* The chromosomes in the third drawing lack sister chromatids because they are in the anaphase stage of cell division. During anaphase, the spindle fibers pull the sister chromatids apart towards opposite poles of the cell. This means each chromatid becomes an independent chromosome.
Therefore, the sister chromatids in the second drawing have simply separated and moved to opposite poles in the third drawing. This separation is a crucial step in cell division, ensuring that each daughter cell receives a complete set of chromosomes.