Coal is made almost entirely of which chemical element?
Group of answer choices.
A. mercury
B. carbon
C. uranium
D. sulfur
Answer:
B- Carbon
Explanation:
just took test
A student wanted to determine the evaporation rates of three liquids. She placed 50 mL of each
liquid outside for an hour on the same day and then measured how much liquid evaporated. Which
would improve the validity of this investigation?
A. Put all three liquids outside at the same time
B. Have 2 students work
Ctogether on the investigation
Change the time for Liquid 3 to 7:00–8:00 PM
he amount of liquids used
Answer: I believe its C
Explanation: 2 and 3 are the same times
Its better to change the time to get different results.
What is one example of an adaptation an organism could have that would
increase its chance to survive?
Answer:
some physical adaptations that have structurally modified animals to improve their chances of survival include webbed feet, sharp claws, large beaks, wings, feathers, fur, and scales.
Explanation:
Entre las células, aquellas que presentan cloroplastos con clorofila pueden ser catalogadas como...… A) ...Heterótrofas B) ...Carnívoras C) ...Autótrofas D) ...Herbívoras
Respuesta:
La respuesta correcta es: C) Autótrofas.
Explicación:
La clorofila es un pigmento verde que se encuentra en las cianobacterias y en células vegetales, dándoles a las plantas y algas su característico color. Se encuentra dentro de los cloroplastos.
La clorofila es una molécula de muchísima importancia para llevar a cabo la fotosíntesis, un proceso clave en la vida de las plantas y cianobacterias, ya que es la forma en la que obtienen los nutrientes que requieren para su supervivencia. El hecho de realizar fotosíntesis es lo que convierte a estos seres vivos en autótrofos, lo que significa que elaboran su propio alimento orgánico a partir de sustancias inorgánicas.
Fill in the information missing in the table to the
right by selecting the appropriate answer from the
drop-down menu.
A
Carbo-
Nucleic
Lipids
Proteins
hydrates
Acids
store surround transport,
energy, and protect
provide
carry genetid
information
provide cells structure
determine
support regulate and support,
the structure
and
cell
help
of proteins,
А functions, chemical
insulate the reactions
and help
build
body, and happen, and
B
с
proteins
B
Function
С
D
E
Example
D
fats, oils
hemoglobin
E
DONE
Intro
D
Answer:
A
Explanation:
Because yea
Imagine carefully weighing a metal can, leaving it out in the rain for weeks and weeks until it was very rusted, and then carefully weighing it again. Would the can be heavier or lighter after it was rusted?
Answer:
The answer would be heavier, though it depends upon the type of metal. Rusting is essentially corrosion. Rust is often caused by a piece of metal getting soaked in water and then being exposed to oxygen. The rust will add more weight to the can so it becomes heavier.
Leaving out metal can in the rain for weeks and weeks until it was very rusted, and then if we carefully weighing it again it can be found that the can weighs more because the rust deposited on the metal can adds more weight.
What is rust?
Rust is referred to as an iron oxide, and a form of corrosion which is caused by a chemical reaction which affects masses of iron and steel.
Once formed, rust starts to eat away at the metal, forming a flaky, orange red coating which weakens the iron. It occurs when the metal reacts with oxygen and water.
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What percentage of ozone is contained in the stratosphere? a. 10% b. 50% C. 80% d. 90% Please select the best answer from the choices provided
Answer:
About 90% of the ozone in our atmosphere is contained in the stratosphere
Explanation:
Answer:
About 90% of the ozone in our atmosphere is contained in the stratosphere
Explanation:
Be a Lunatic
What are the moon's craters caused by?
volcanic eruptions
collisions with asteroids
collisions with Earth
collisions with ultraviolet radiation
The cones of a pine tree open in response to heat from a forest fire. The seeds are released
and are spread over a wide area. Hundreds of pine seedlings per acre grow, along with other
plants. Animals eat the plants, and the forest regenerates. This process is an example of
Answer: I believe it’s an example Natural processes
Explanation: Natural processes are interactions among the plants, the animals, and the environment.
These interactions also include photosynthesis, pollination, decomposition and others, that help create and shape natural communities.
After mitosis, what is true of the two new cells produced from the original cell?
A. The new cells each receive an exact copy of all the chromosomes from the original cell.
B. The new cells each donate a set of chromosomes to the original cell.
C. The new cells each receive half of the chromosomes from the original cell.
D. The new cells each have a few chromosomes from the original cell.
Answer:
A. The new cells each receive an exact copy of all the chromosomes from the original cell.
Explanation:
Male peacocks have large colorful tails that they spread in a fan shape to attract females during courtship. Peahens (female peacocks) are more likely to mate with males that have larger and more colorful tails. As a result, few peacocks have tails with dull coloring.
A male peacock.
Which concept is demonstrated by a decrease in dull coloring?
speciation
biodiversity
natural selection
variation
Answer:
C
Explanation:
The concept demonstrated by a decrease in dull coloring in male peacocks is natural selection.
What is natural selection?
Natural selection is the process by which organisms with favorable traits are more likely to survive and reproduce, passing those traits to the next generation. In the case of male peacocks, having large and colorful tails is a favorable trait because it increases the likelihood of attracting a mate and passing on their genes.
As a result, over time, more and more peacocks have developed larger and more colorful tails through natural selection. The decrease in dull coloring among male peacocks is an example of natural selection favoring a particular trait (large, colorful tails) that confers a reproductive advantage, leading to a change in the population over time. Therefore, the correct concept demonstrated by a decrease in dull coloring is natural selection.
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Noradrenaline facts tysm
Answer:
it is a catecholamine that stimulates alpha1 adrenergic receptors and, slightly, beta1 adrenergic receptors, without beta2 effect. It is the vasoconstrictor drug par excellence.
Name one of the people who's work contributed to Darwin's Theory of Natural Selection. In 2-4 sentences discuss that individuals work. In another 1-2 sentences who did that individuals work contribute/ relate to Darwin's Theory.
Explanation:
everything can be found in the picture
The photograph shows a result of waves made by an earthquake.
What was transported to this location by the earthquake waves?
A. Rock
B. Matter
ОООО
C. Gravity
D. Energy
PREVIOUS
C Gravity
Because more pleasure will be occurred in earth
The following includes the steps that should be taken when blood is found at a crime scene EXCEPT
Answer:
confirm the point of origin
What is the structure labeled A?
non living martix . Lacunae . cartilage. onondrocyte
Explain how the slow recovery of the bald eagle population likely affected the recovery of the salmon population
Answer:
Because if there is not many bald eagles around to hover on top of the water and hunt this gives an opportunity for the salmon population to expand without be constantly hunted
Attached earlobes are a recessive trait in humans. In the tree below, people
with attached earlobes are shaded in. Which best describes the person
labeled X in the tree?
A. A female with no recessive alleles
B. A male with no recessive alleles
C. A male with one recessive allele
D. A female with one recessive allele
Answer:
It would be C
Explanation:
If you look at the tree you can see that one of the male's parents had the recessive allele, and one of the siblings has the ressive allele, the means the male could have the trait but isnt showing it.
A male with one recessive allele describes the person labeled X in the tree.
What is Recessive allele?
In terms of genetics, the term "recessive" describes the connection between an observed trait and the two inherited forms of a gene associated with that feature.
Each gene has two alleles that an individual inherits from each parent. When a characteristic is recessive, both of the (recessive) alleles of the gene that causes the trait must be present for the trait to manifest.
When there is only one copy of an allele, it has no effect at all. This is in contrast to a dominant trait, which can only be expressed when one of the two alleles is present.
Therefore, A male with one recessive allele describes the person labeled X in the tree.
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Las células en los tejidos epiteliales están fuertemente unidas a la lámina basal. ¿Qué tipo de proteínas están involucradas en este tipo de unión célula-matriz?
Answer:
integrinas y lamininas
Explanation:
Las integrinas son glucoproteínas implicadas en el anclaje de las células epiteliales a la matriz extracelular. Las células epiteliales tienen en su base proteínas integrinas que se unen a otras proteínas tales como vitronectina, fibronectina, colágeno y laminina. De este modo, las integrinas se asocian con lamininas de la lámina basal. Las lamininas son otra clase de glucoproteínas las cuales conforman la lámina basal y contienen sitios de unión para integrinas. A partir de esta asociación las células epiteliales pueden adherirse a la membrana basal y mantener su orientación dentro de un tejido. Estas uniones son fundamentales para que las células epiteliales puedan soportar fuerzas y son críticas durante el desarrollo apropiado (ontogenia) del organismo.
Differences in traits, such as hair texture, are determined by differences in -
A. the location of sugar groups in DNA.
B. sequence of nucleotides in DNA.
C. the number of nitrogenous bases in DNA.
D. the molecules attached to the phosphate in DNA
Answer:
the molecules attached to the phosphate in DNA
True/False. Genetic recombination makes it so your grandfather will always pass on more DNA to you than your grandmother
Answer: false
Explanation:
Which statement describes how osmosis is a significant part of sexual reproduction
Answer:
k
Explanation:
A boxer has been jumping rope for an hour. His leg muscles are burning and
he feels weak. Which substance is the most likely
cause of the burning he
feels in his muscles?
Answer:
anaerobic respiration takes place when you demand your muscles to do vigorous work. normally, aerobic respiration takes place but when energy is needed immediately, anaerobic respiration takes place. during anaerobic respiration,the body produces lactic acid, which leads to the burning sensation. your lungs deliver oxygen to the muscles much slower than the rate you need, since you're putting your muscles through an extensive exercise, and this leads to muscle fatigue.
SERE
Explain how using non-local resources has affected the United States both environmentally and economically.
Answer: Possible economic consequences of using non-local resources include increased costs of resources, loss of jobs, increased security risks, and a trade deficit.
Explanation:
Hope it helps you if not sorry
Sample Answer:
Possible environmental consequences of using non-local resources include the risk of oil spills as oil is transported over waterways, increased air pollution from water and land transportation of resources, and habitat loss that comes from pipeline construction and other infrastructures. Possible economic consequences of using non-local resources include increased costs of resources, loss of jobs, increased security risks, and a trade deficit.
Explanation:
An advantage of asexual reproduction is that it __________. Group of answer choices allows a species to easily rid itself of harmful mutations enhances genetic variability in the species allows the species to endure long periods of unstable environmental conditions produces offspring that respond effectively to new pathogens maintains successful genetic combinations without modification
Answer:
Maintains successful genetic combinations without modification.
Explanation:
Asexual reproduction usually creates perfect copies of the parent. If the parent is genetically sound creature, then a successful genetic combination is being reproduced and maintained without any changes or modification.
Question 1 of 25
Which element forms the "backbone of many of the molecules in living
things?
A. Calcium
O
B. Carbon
O C. Hydrogen
O D. Oxygen
Answer:
B. Carbon
Explanation:
in your body, including proteins, DNA, RNA, sugars, and fats. These complex biological molecules are often called macromolecules; they're also classified as organic molecules, which simply means that they contain carbon.
You look at two species and see very similar DNA. What does this likely tell you?
Answer:
They are likely to have evolved from similar ancestors.
Global warning is most closely associated with
Answer:
Fossil fuel
Explanation:
Human usage of fuel
Which of the following practices does NOT help to conserve the environment?
Overgrazing
Crop rotation
Reafforrestation
Using natural fertilizers
Answer:
over grazing is the answer
What are the two main components of the cell cycle
In eukaryotic cells or cells with a nucleus, the stages of the cell cycle are divided into two major phases: interphase and the mitotic (M) phase.
What is cell cycle?
The cell cycle, or cell-division cycle, is the series of events that take place in a cell that cause it to divide into two daughter cells. These events include the duplication of its DNA (DNA replication) and some of its organelles, and subsequently the partitioning of its cytoplasm and other components into two daughter cells in a process called cell division.
In cells with nuclei (eukaryotes, i.e., animal, plant, fungal, and protist cells), the cell cycle is divided into two main stages: interphase and the mitotic (M) phase (including mitosis and cytokinesis). During interphase, the cell grows, accumulating nutrients needed for mitosis, and replicates its DNA and some of its organelles. During the mitotic phase, the replicated chromosomes, organelles, and cytoplasm separate into two new daughter cells. To ensure the proper replication of cellular components and division, there are control mechanisms known as cell cycle checkpoints after each of the key steps of the cycle that determine if the cell can progress to the next phase.
In cells without nuclei (prokaryotes, i.e., bacteria and archaea), the cell cycle is divided into the B, C, and D periods. The B period extends from the end of cell division to the beginning of DNA replication. DNA replication occurs during the C period. The D period refers to the stage between the end of DNA replication and the splitting of the bacterial cell into two daughter cells.
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