Answer:
In 1953, scientist Stanley Miller performed an experiment that may explain what occurred on primitive Earth billions of years ago. He sent an electrical charge through a flask of a chemical solution of methane, ammonia, hydrogen and water. This created organic compounds including amino acids.
Making amino acids is tricky, even in the laboratory. We know amino acids exist in some kinds of meteorites and interplanetary dust particles. When they rain down on a planet's surface, they import the possible building blocks of life, not necessarily life itself. Scientists think that along the way, there must have been a crucial step that turned atoms into organisms, but they still don't know what it is.
How do we get our oxygen if plants do cellular respiration. If plants do cellular respiration and photosyntehsis shouldn't there be no oxygen in the air?
At birth Himalayan rabbits are usually
white over their entire bodies. But
when parts of their bodies reach
temperatures below 35°C, a pigment
that causes these parts to turn black is
produced. Which of the following is
most likely the cause of this
phenomenon?
Answer:
C
Explanation:
because i took the test and got it right
The Himalayan rabbits are usually white but they show gene expression that is regulated by temperature. Hence option C is correct.
What are Himalayan rabbits?The Himalayan rabbits are rare rabbits that is medium-sized and they show coloration during the changes in temperatures.
These rabbits are one of the oldest and calmest breeds. The gene expression leads to them having brown and black coats with a change in the climate.
Find out more information about the himalayan rabbits.
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Definition of inversion
Carbon dioxide (CO2) is released during which of the following stages of cellular respiration?
Answer:
During glycolysis carbon dioxide is released
Explanation:
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How many sig figs in 4737
Answer:
There are four significant figures.
Explanation:
Significant figures:
The given measurement have four significant figures 4.7.3 and 7.
All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.
Zero between the non zero digits are consider significant like 104 consist of three significant figures.
The zeros at the right side e.g 2400 are also significant. There are four significant figures are present.
Chlorophyll
Chloroplast
15
What two input for Photosynthesis that plants use to make their food is
O Light energy, H20 (water)
O Light and Oxygen
0 Light and ATP
Answer:
Light energy and water
Explanation:
Answer:
Light energy and H20
Explanation:
Plants use the energy from the sun and water to grow to create things like oxygen as well as things like glucose. It cannot make oxygen out of oxygen because then it wouldn't need to be made by plants. ATP is energy that is made during cellular respiration, cellular respiration uses the oxygen and glucose produced by plants during photosynthesis to create ATP energy.
Which statement describes an advantage of asexual reproduction?
Asexual reproduction results in variations in DNA.
Asexual reproduction causes less competition for resources.
O Asexual reproduction is faster than sexual reproduction.
O Asexual reproduction requires more energy than sexual reproduction.
Answer:
i would pick the answer c
Explanation:
sexual reproduction is slower than asexual reproduction because in order to reproduce sexually, you would need to find a partner first. but reproducing asexually is quicker because you don't need a partner
Answer:
c or b
Explanation:
asexual reproduction is much faster and lots of resources are not needed. while sexual reproduction you need another parent .
Which BEST describes the process of aerobic cellular respiration?
A: a process of energy cornversion that releases energy from food in the presence of Oxygen, forming new cormpounds
B: a process of energy conversion that captures light energy and transforms it into chemical energy
C: a process of energy trarsfer that converts liquid water into water vapor
Answer:
B.) A process of Energy conversion that captures light energy and transforms it into chemical Energy.
Explanation:
Aerobic respiration is the process of producing cellular energy involving oxygen. Cells break down food in the mitochondria in a long, multistep process that produces roughly 36 ATP. The first step in is glycolysis, the second is the citric acid cycle and the third is the electron transport system.
People find that when they seek treatment for disorders:
A. they often feel much better.
O B. they feel worse than before treatment.
OC. there isn't much hope.
O D. all people are given medication.
A!!!
Explanation:
getting better
The risk of chronic diseases linked to stress, anxiety, and substance addiction is also decreased by mental health services. Most importantly, mental health treatments improve the perspective for people who might feel lost and hopeless, while also saving lives. Thus, option A is correct.
What is to seek treatment for disorders?All forms of medical care are included, unless specifically stated differently (below). Using prescription drugs or a non-prescription drug that has been diluted to a prescription level.
The diagnostic procedure serves as both a prelude to and a form of treatment in and of itself. Problems with behavior and physical health can both be helped by diagnosis when it is used as a therapeutic tool.
Therefore, people find that when they seek treatment for disorders. They often feel much better.
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What does it mean for a model to be "to scale", or a scaled model?
Answer:
To scale means it's the same size as in real life, as in 1 foot = one foot
Scaled means it's shown either larger or smaller, as in 1 foot = 1 inch or 1 foot = 1 mile
Explanation:
Can a molecule function without atoms?
What causes nucleotides to switch locations in a DNA molecule?
Answer:
DNA is a dynamic and adaptable molecule. As such, the nucleotide sequences found within it are subject to change as the result of mutation. Depending on how a particular mutation modifies an organism's genetic makeup, it can prove harmless, helpful, or even hurtful.
Explanation:
which statement best describes the water cycle:
a: a simple circular path that water takes around earth
b: a complex path that water repeats
c: a cycle if processes by which water circulates the earth's oceans , atmosphere , and land.
Answer:
C. A cycle of processes by which water circulates the earth's oceans, atmosphere, and land.
Explanation:
The term water cycle (also called the hydrologic cycle or the hydrological cycle) refers to the way water moves on, above, and below the surface of the Earth.
As the sun heats up the surface of our planet, water evaporates from it, rises up into the atmosphere, cools, and turns into rain or snow in clouds. Then, in this form, it falls on the surface again. This cycle constantly repeats itself, which means that water moves all the time.
You can see an illustration of this phenomenon in the image attached below:
Please help!!!!!!!!!!!!!!!!!!!!
What would most likely happen to plant cells if the plant was watered with salty water?
A. Water will enter the plant cells until the large central vacuole bursts
B. The plant's root will filter out the right amount of salt so the plant can remain isotonic.
C. Salt crystals will form on the leaves as water evaporates on the leaf surface.
D. Water would leave the large vacuole of the cell and the plant will droop.
Answer:
option D
Explanation:
the plant will lose water because water moves out of the cell and the vacuole will leave the cell
Water would leave the large vacuole of the cell and the plant will droop if it was watered with salty water.
What is Vacuole?This is referred to as an organelle within a cell that is empty of cytoplasm, lined with a membrane, and filled with fluid.
In cases where the plant is watered with salty water, osmosis takes place which involves water leaving the vacuole and the plant drooping thereby making option D the most appropriate choice.
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Match the term to its definition.
control group, data, hypothesis, inference
observations that may be quantitative or qualitative
a tentative, testable scientific explanation
useful for determining the effect of the independent variable
a logical interpretation based on prior knowledge
Explanation:
hypothesis is the last one
data is the 3rd one
inference is the 2nd one
and control group is the first one
process of elimination is your best friend
Having an accurate model of an atom is important except..
A. It can help give information on how atoms work.
B. We use the model to learn how to create new things.
C. Learning about atoms will help create better organisms.
D. It can help support the explanation of the origin of the universe.
How they worded this question does not make sense to me.
Answer:
I think the answer is D. but I'm not 100% sure.
Answer:
The answer to your question is going to be A.
Explanation:
It teaches us how atoms work. and it also gives us more information about how and what they are!!
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Farmers have selected for increased oil content from corn. For a long time, the plants responded with steadily increasing oil content, but recently the response slowed and then stopped. When this line of corn is crossed to another line and the hybrids are selected, the oil content resumed its climb. What is a plausible reason for the lack of response?
A. The environmental conditions improved.
B. The genetic variation for the trait was exhausted.
C. There was too much genetic variation for the trait.
D. The environmental conditions deteriorated.
E. Artificial selection is different than natural selection.
Answer:
B. The genetic variation for the trait was exhausted.
Explanation:
Oil content is a quantitative trait, ie., a phenotypic feature that depends on the accumulative effects of many genes and the interaction of a genotype with its environment. During crop improvement, the plants (i.e., lines) containing desired alleles involved in the variation of this trait will be selected, thereby increasing oil content but simultaneously decreasing the genetic variation of the population. In consequence, after successive rounds of artificial selection, lines will not have sufficient genetic diversity to be again selected for this trait.
bruising of brain tissue
Answer:
Cerebral contusion
Explanation:
a form of traumatic brain injury, is a bruise of the brain tissue. Like bruises in other tissues, cerebral contusion can be associated with multiple microhemorrhages, small blood vessel leaks into brain tissue. Contusion occurs in 20–30% of severe head injuries.
Students are studying bushes found in deserts and grasslands. They find that some bushes with yellow flowers looked very similiar, but when looking at the leaves, they notice small differences. The cresosote bush is found in deserts and has small leaves with a thick waxy coating. The St. John’s wort bush is found in cooler climates and has small leaves that are much thinner and appear to have very little waxy coating. Which of the following best explains this differences between the St. Johns wort and Cresosote bush?
The plants use photosynthesis differently so their leaves have different amounts of chloroplasts.
The plants are exposed to different amounts of sunlight so the leaves have changed to produce more flowers.
The plants grow in different environments and have adapted to the climates they grow in.
There are different chemicals invloved in photosynthesis for each plant, resulting in changes. PLz Hurry CAN ANY ONE ANSWER THIS I WILL GIVE A LOT OF POINTS
Answer: the plants are adapted to different climates. The waxy coating is thick on the desert plant as an adaptation to conserve water.
Explanation: Both plants live in full sun, so have similar exposure and similar levels of chloroplasts, no difference that alters flowering. Both plants are C3 type photosynthesisers, with the same photosynthetic system.
You read an article on a website that suggests that there may be a new form of cancer-causing mutagen that causes the DNA backbone structure to be disrupted in its normal sequence. Using your knowledge of the structure of the DNA molecule, explain how you might hypothesize such a mutagen might impact the ability for the DNA molecule to do its job effectively.
Answer:
The mutagen might alter the DNA sequence, thereby altering the accessibility to transcription factors and thus activate the expression of oncogenes involved in cell proliferation
Explanation:
The DNA molecule consists of two antiparallel strands of nucleotides that wind around each other. Each DNA strand is formed by a backbone containing sugar (deoxyribose) and phosphate groups. This arrangement allows for DNA replication and transcription (and consequently also protein synthesis) to occur. If a mutagen agent binds to DNA, this might modify its structure, thereby altering DNA replication and transcriptional activity.
I need help please & show work??
Hydrogen - 3 is a radioisotope with a half life of 12.32 years. How long would it take a 40 g sample to decay down 2.5 g ?
Answer:
Whether or not a given isotope is radioactive is a characteristic of that particular isotope. Some isotopes are stable indefinitely, while others are radioactive and decay through a characteristic form of emission. As time passes, less and less of the radioactive isotope will be present, and the level of radioactivity decreases. An interesting and useful aspect of radioactive decay is half-life, which is the amount of time it takes for one-half of a radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by coTnditions and is independent of the initial amount of that isotope.
Consider the following example. Suppose we have 100.0 g of tritium (a radioactive isotope of hydrogen). It has a half-life of 12.3 y. After 12.3 y, half of the sample will have decayed from hydrogen-3 to helium-3 by emitting a beta particle, so that only 50.0 g of the original tritium remains. After another 12.3 y—making a total of 24.6 y—another half of the remaining tritium will have decayed, leaving 25.0 g of tritium. After another 12.3 y—now a total of 36.9 y—another half of the remaining tritium will have decayed, leaving 12.5 g. This sequence of events is illustrated in Figure 15.1 “Radioactive Decay”.
Explanation:
Please help me! I will give you all my points
Anatomy / Physiology Question:
State and describe the three types of muscles
Answer:
Muscle physiology
Explanation:
What is a waste product must be removed from the body
Answer: Excretion is the removal from the body of waste products which result from normal life processes. Waste products such as carbon dioxide must be removed. If they are allowed to accumulate they cause poisoning which slows down vital chemical reactions.
Explanation:
You and your friend want to see how changing the type of liquid (e.g. water, milk, orange juice) given to a plant affects how high it grows. What would be the independent variable in this experiment?
SELECT AN ANSWER
1)the type of plant used
2)the temperature of the air
3)the type of liquid
4)the height of the plant
Answer:Hi! It’s the type of liquid/third answer
Explanation:
This is the independent variable because it’s the component of the experiment that is being changed to measure the results.
The Earth's uppermost layer is made up of tectonic plates. The primary tectonic plates are shown on the map below. Image courtesy of the USGS At the boundaries of tectonic plates, rock materials A. are brought to Earth's surface from its interior and to Earth's interior from its surface. B. cannot be found due to the process of melting. C. are only brought to Earth's interior from the surface. D. are brought to Earth's surface through the process of erosion.
Answer:
A
Explanation
A. are brought to Earth's surface from its interior and to Earth's interior from its surface.
The tectonic plate boundaries, rocky material brought to the Earth's surface from its interior and from the Earth's surface to its interior. So, the correct option is A.
What are Tectonics plates?Tectonic plates are defined as huge pieces of Earth's crust and uppermost mantle that are made up of oceanic crust and continental crust. Earthquakes occur around major faults that mark mid-ocean ridges and plate edges.
These plates act like hard and rigid shells in comparison to Earth's mantle which is the strong outer layer called lithosphere. At tectonic plate boundaries, rocky material is brought to the Earth's surface from its interior and from the Earth's surface to its interior.
Therefore, the correct option is A.
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The location on earth surface above the point where an earthquake start is
Answer:
The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter.
Explanation:
Answer:
The location below the earth's surface where the earthquake starts is called the hypocenter, and the location directly above it on the surface of the earth is called the epicenter.
hope this helps
Which of the following is not part of the cell theory?
A.All living things are made of cells.
B.All cells come from other living cells.
C.The cell is the smallest component of an organism.
D.Cell membranes move materials in and out of the cell.
Answer:
i think that the answer is b
Which organelle is the site where energy is made in an animal cell?
A. Golgi bodies
B. Nucleus
C. Endoplasmic Reticulum
D. Mitochondria
Answer:
D
Explanation:
Answer:
D
Explanation:
The Mitochondria is the power house of a cell
Which of these causes the day/night cycle on earth
Answer:
Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. The term 'one day' is determined by the time the Earth takes to rotate once on its axis and includes both day time and night time.
Explanation:
hope it becomes helpful to you ☺️☺️
good luck
Answer:
Day and night are due to the Earth rotating on its axis, not its orbiting around the sun. The term 'one day' is determined by the time the Earth takes to rotate once on its axis and includes both day time and night time.
Explanation:
:) hope this helps!
