Answer:
Sugars can be separated from steroidal homones by observing the solubility of these two molecules in water and observing the presence of a negatively altered group in one of the two molecules.
Explanation:
Steroid hormones are molecules derived from cholesterol and usually present a negative change in their structure, which differs from sugars such as carbohydrates and allows these two molecules to be purified, being isolated from each other.
Another way of purifying these two molecules is to observe the solubility of both in water, since sugars are completely soluble in water, without altering the osmotic balance of the cells, however, the same cannot be observed with steroid hormones.
Select the statement that is FALSE.
Common type of lipids are
fats, oils, and waxes.
Common type of lipids are
sugars and starches.
Lipids do not dissolve
in water.
Lipids form a waterproof barrier
in the cell membrane.
Answer:
false is common types of lipids are sugars and starches
Explanation:
sugars and starches are carbohydrates
Answer:
The false sentnace is "Lipids form a waterproof barrier
in the cell membrane."
Hope this helps <3
Specialized cells called
cells help move the skeleton and help the heart beat and pump blood.
Answer:
Explanation:
Cardiac muscle tissue works to keep your heart pumping through involuntary movements. This is one feature that differentiates it from skeletal muscle tissue, which you can control. It does this through specialized cells called pacemaker cells.
Answer:
Specialized cells called MUSCLE CELLS cells help move the skeleton and help the heart beat and pump blood.
Explanation:
May I get brainliest please? :)
Helppp w this question
Answer:
A
Explanation:
3. What are some scientific explanations for the history of life on Earth?
Answer:
Many scientists favor the RNA world hypothesis, in which RNA, not DNA, was the first genetic molecule of life on Earth. Other ideas include the pre-RNA world hypothesis and the metabolism-first hypothesis. Organic compounds could have been delivered to early Earth by meteorites and other celestial objects
Do the trees discussed in the article make their own energy every day? Use evidence from the article to support your statement.
A Change in Leaf Color
Leaves go to a lot of trouble to turn red in the fall.
By Emily Sohn
September 17, 2006 at 11:00 pm
Every autumn, traffic creeps along New England’s roads as visitors look everywhere but at the road. These tourists flock to the region as soon as leaves begin to change color from a summery green to spectacular shades of red, orange, yellow, and purple.
“Being in the Northeast during autumn is just about as good as it gets in this country,” says David Lee. He’s a botanist at Florida International University in Miami.
Lee studies leaf color, so he’s biased. But plenty of other people share his admiration. Areas of the United States with especially colorful fall displays attract thousands of leaf peepers.
Even as they “ooh” and “aah,” few people know what makes many plants blush in the autumn. Research has shown that leaves change color when their food-making processes shut off. The chemical chlorophyll, which gives leaves their green color, breaks down. This allows other leaf pigments—yellow and orange—to become visible.
No one knows exactly how global warming will alter forests and affect fall colors.
But “there’s still a lot we don’t know about this,” Lee says.
It isn’t clear, for example, why different species of plants turn different colors. Or why some trees become redder than others, even when they’re standing right next to each other. And no one knows exactly how global warming will alter forests and affect leaf-peeping season.
In summer, when a plant is green, its leaves contain the pigment chlorophyll, which absorbs all colors of sunlight except green. We see the reflected green light.
The plant uses the energy it absorbs from the sun to turn carbon dioxide and water into sugars (food) and oxygen (waste). The process is called photosynthesis.
When chlorophyll breaks down, yellow pigments in leaves become visible.
As days get shorter and colder in the autumn, chlorophyll molecules break down. Leaves quickly lose their green color. Some leaves begin to look yellow or orange because they still contain pigments called carotenoids. One such pigment, carotene, gives carrots their bright-orange color.
But red is special. This brilliant color appears only because the leaves of some plants, including maples, actually produce new pigments, called anthocyanins.
That’s a strange thing for a plant to do without a reason, says Bill Hoch of the University of Wisconsin in Madison. Why? Because it takes a lot of energy to make anthocyanins.
Answer:
No, they don't.
Explanation:
Trees need leaves for photosynthesis because leaves contain chlorophyll. As the article states, the food-making process stops after these trees lose their leaves. Some trees keep their leaves all year long.
According to the article, trees do not make their own energy every day. This is because the process of energy is accomplished by photosynthesis which is usually carried out by the leaves. But trees generally lost their leaves during a particular time of the year.
What process is used by plants to make energy?The process that is used by the plant in order to make energy is known as Photosynthesis. With the help of this process, all green plants and some photosynthetic algae synthesize their own food in the form of glucose with the help of carbon dioxide and water in the presence of sunlight.
There are some plants that hold leaves for the entire year. In these plants, energy is made every day. But in nature, these plants are very few. Plants carry out the process of photosynthesis when they need energy in the form of glucose which is also transferred into the storage form of energy in starch.
Therefore, trees do not make their own energy every day. This is because the process of energy is accomplished by photosynthesis which is usually carried out by the leaves.
To learn more about Photosynthesis, refer to the link:
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PLEASE HELP!!!! ASAP
Answer:
Lipids
Explanation:
A lipid is any of various organic compounds that are insoluble in water. They include fats, waxes, oils, hormones, and certain components of membranes and function as energy-storage molecules and chemical messengers.
How has human use of salt marshes changed over time? a. Humans have come to value salt marshes and now seek to preserve and restore them. b. Humans now use drained salt marshes exclusively for agriculture. c. Humans have begun to use salt marshes for landfills. d. Humans have begun to use marsh land for housing and commercial development.
Answer:
. Humans have come to value salt marshes and now seek to preserve and restore them
This is the portion of a wet land that is constantly flooded by tides,,and as the salt water carried by the tide regresses, it drained this portion of land leaving a wet land.This wetland is called salt mashes.They are ubiquitous,in the estuary habitat.
The soil layer is mostly of deep mud and peat.The latter contain decomposing plant material carried by the tide.The oxygen level is usually low,due to activities of bacteria abundant in the soil.Its vegetation contain some covered grasses,herbs,and shrubs,because the constant flooding depleted the soil nutrients.
Humanity has come to realized that these wetlands has some benefits
1.it Protect the shorelines from being washed away by erosion.This is because it reduced the momentum of erosion by buffering the effect of the waves,reducing it speed and therefore reducing the damaging effect of the erosion.,
It also reduces flooding by reducing run off, by allowing rain water to sink deep,therefore prevent stagnancy of water on the soil surface, slowing down the pace,which would have removed the topmost layer containing nutrients
It also improve the quality if water available,because he debris carried the tides serve as the sever to filter the water,separating sediment,improving quality.
Answer:
A
Explanation:
plz help me i will give u brainlist
The water level in McColm Pond went down drastically during a drought last summer. Some students
decide to monitor the water level during a school year. There is a dock over the pond. Which is the BEST method for collecting data on the level of water in the pond?
A. Visit the pond at the end of the year and measure the water depth with a measuring pole at different spots.
B. Visit the pond each month and measure the water depth with a measuring pole at the end of the dock.
C. Visit the pond at the end of the year and measure the water depth with a measuring pole at the end of the dock.
which of the following most accurately depicts how a decline in Americas metal economy can negatively affect another countrys economy can negatively affect another country’s economy
Answer:
jobs are lost due to lack of metal for computers
Please HELP I am TIMED!!!!
Which of the following nutrients in fertilizer causes abnormalities in muscle contractions?
zinc
potassium
nitrogen
copper
Answer:
potassium I think I am not sure
Can you help me ifts science and I’ll give you a branlist list please help me
Answer:
The answer is A!
Explanation:
Because liquids and gases move, soilds will stay in place unless you move it.
In parasitism, the organism benefiting is called the ____.
parasite
predator
host
prey
Answer:
parasite
Explanation:
The parasite is the organism that benefits from the relationship, while the host is harmed by the relationship.
OSMOSIS is a type of ______________ diffusion.
Group of answer choices
energy requiring
active
fictional
passive
I think the answer is Passive
Name the type of fatty acids found in lipids that form solid fats and oils at room temperature
Answer:
Unsaturated fatty acids form solid fats and oils at room temperature
what are two examples of non human organizms
Answer:
A Dolphin and a Spider
Explanation:
Non-human organisms are animals other than the Homo sapiens species. Whales and crocodiles are examples of non-human organisms.
What are non-human organisms?Non-human organisms are the species of the kingdom Animalia that are apart from the Homo sapiens species but can be a mammal, amphibians, reptiles, aves, etc.
The whale and monkeys belong to a mammalian class, whereas crocodiles are reptiles. They are not primates and do not belong to the genus Homo that classifies humans.
Therefore, Whales and crocodiles are examples of non-human organisms.
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Choose the THREE things that a cell membrane does. *
Protects
Supports
Controls
Storage
The process of maintaining a relatively constant internal environment despite changes in the external environment is called
Answer:
Homeostasis
Explanation:
The process of maintaining a relatively constant internal environment despite changes in the external environment is called Homeostasis
Choose all that explain why carbon is so important to life.
Carbon (C) appears in the second row of the periodic table and has four bonding electrons in its valence shell.
Carbon can form ionic bonds when combining with metals and covalent bonds with nonmetals.
Carbon can bond to itself in many different ways: chains, rings, branched chains.
Hydrocarbons contain only carbon, hydrogen, and oxygen.
Carbon can form single, double or triple covalent bonds.
Because carbon can bond in so many different ways, a single molecule can have different bonding configurations or isomers.
Answer:
A, C and D
Explanation:
It creates no ionic bonds because it would need certain changes to it.
Im not so sure about E because the configurations are very similar.
And A seems to make sense because its essential to life itself.
Answer:
A, C, E, F, For USA Test Prep
Explanation:
I got 100% on it. So yeah.
A biology student has grown tomato plants for several years. Until now, he used an artificial fertilizer formulated for tomato plants. The fertilizer caused his plants to grow faster and taller than they grew in unfertilized soil. The student want to know whether using natural compost will cause his tomato plants to grow faster and taller than his artificial fertilizer.
Answer and Explanation:
Before starting the student observations and inferences is that the plants for tomato would grow instantly and also tall by the artificial fertilizer instead without any fertilization
This would results in using the manure also the biogas could also be generated
In this way, the interferences could be done
true or false
All living things have a heart.
Answer:
False
Explanation:
Can you same the same thing about organisms and aquatic animals, not every single living thing has an heart to survive.
`what is physical science
Physical science is concerned with the inorganic world, including physics, astronomy, certain types of chemistry, and generally, earth sciences. If it includes non-living things, it is physical science.
Answer: the study of what things are made of and how they change
Explanation: Hope this helps :) Brainliest?
What governs inherited traits within an individual?
You just swam in a pool for 3 hours straight. Now your skin is wrinkly/pruned! This is an example of:
A osmosis
B diffusion
C active transport
Answer:
the answer would be A
Explanation:
Explain why the plants from year 2-4 may not be
present in year 25-50
Answer:
ecological succession.
Explanation:
The plant may not be present in 25-50 years due to ecological succession. in ecological succession, the vegetation such as small plants that is present replaces by the more suitable vegetation such as trees because the vegetation (small plants) did not receive nutrients and sunlight so they are unable to grow and finally dies due to lack of basic needs. So that's why plant may not be present 25-50 years.
what makes a scientific observation different from day to day?
lo hace diferente por la obserbasion de las las estrellas y cambios de la luna
Which of the following is not one of the seven characteristics of life?
o reproduction
O response
O adaptation
O mobility
Answer:mobility is not one of the seven characteristics of life
Explanation:
If....., then..... is one of the proper formats for a hypothesis
True or False ?
Answer:
True
Explanation:
You should always use the if...then statement when forming your hypothesis
What kind of molecule is represented in the diagram?
Fatty Acid
Glycerol
Fatty Acid
Fatty Acid
O A. A nucleotide
B. A nucleic acid
C. A triglyceride
O D. A polysaccharide
fill in the blank spaces
After exercise, capillaries close to the surface of the skin become
; this process is called
. More blood supply goes through the capillaries so more heat is lost from the
.
Answer:
Body temperature is monitored and controlled by the thermoregulatory centre in the brain. This centre has receptors sensitive to the temperature of the blood flowing through the brain. If the core body temperature is too high, the thermoregulatory centre causes the blood vessels supplying the skin capillaries to expand so that more blood flows through them. Since the blood flows through the entire body, it can take the excess heat from the core of the body to the skin, where it can be lost. When a blood vessel of any sort increases in diameter, we say that it dilates. Because the dilation is related to the vascular (blood) system, this process is called vasodilation.
The elements that touch the zigzag line are classified as
Answer:
these are called Metalloids. They touch in between the metals and non-metals
Explanation:
