Answer:
When the star runs out of hydrogen the core's temperature decreases so the thermal pressure decreases as well. With a result of the core becoming less efficient to hold up the rest of the star's weight. The core and the gas around it starts shrinking As this happens, the gas in the core and shell around it heats up. Then the star is becomes a supernova.
gravity reversing on its self because the energy/fusion was keeping it from collapsing
how the different biotic component interact among themselves?
Answer:
In general, abiotic factors like rock, soil, and water interact with biotic factors in the form of providing nutrients. Just as humans mine mountains and cultivate soil, rock and soil provide resources for plants, and plants cycle the nutrients through so they (usually) end up back in the ground where they began.
give ten reasons why it is difficult to decide whether viruses are living organisms
Answer:
Viruses are not made out of cells, they can't keep themselves in a stable state, they don't grow, and they can't make their own energy. Even though they definitely replicate and adapt to their environment, viruses are more like androids than real living organisms.
Explanation:
What is speciation? in your own words
Answer:
A new species being created through evolution
DO NOT COPY AND PASTE IT WILL BE A ZERO
What are a few ways humans are having a negative effect on aquatic ecosystems?
What would you do to solve the issue? (Answer in complete sentences) 4-5 Sentences
Answer:
Aquatic systems are negatively affected by urban growth runoff. Here are few examples: Oil Spill, litter, Overfishing, Carbon Emission and Habitat destruction
EARTH SCIENCE a student conducts an experiment to see how music affects plant growth the student obtains four identical plants each one is potted in the same type of soil and receives the same amount of sunlight and water each day plant a listens to classical music for three hours each day plant b listens to rock music for three hours each day plant c listens to country music for three hours each day plant d does not listen to any music at all. Based on the experiment in the scenario which visual aid would be most helpful in showing the change in the plants height over time? A. A pie chart B. A timeline C. A bar graph D. A line graph
Answer:
A time line would be my option
A line graph will be more helpful in showing the change in the plants height over time. The correct option is D.
What is a line graph?A line graph, also known as a line plot or a line chart, is a graph that connects individual data points with lines.
A line graph depicts quantitative values over a given time period. Line graphs are commonly used in finance to depict the historical price action of an asset or security.
Line graphs are used to chart changes over short and long time periods. Line graphs are preferable to bar graphs when there are minor changes.
Line graphs can also be used to compare changes in more than one group over the same time period.
A simple line graph is a graph that is made up of only one line.
Thus, the correct option is D.
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A scientist conducts an experiment on a virus and a species of bacteria. The virus and the bacteria are put in the same Petri dish for 24 hours and provided a food source. The scientist notices that the number of bacteria increases significantly, whereas the virus makes no change
Answer:
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Explanation:
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In an experiment, where both bacteria and virus are put in a petri dish for 24 hours and provided a food source, then it is observed that the number of bacteria increases significantly whereas the virus show no change as they could not divide outside the living cell.
What are Viruses?
Viruses are the acellular organisms which are mostly pathogenic in nature. Viruses are made up of genetic material which could be DNA or RNA and a protein coat which protects the genetic material.
Viruses are the microscopic organisms which are mostly pathogenic in nature. Viruses does not have the enzymatic machinery required for their division and development. Thus, it depends upon other organisms cellular machinery for their growth and division.
In the petri dish with sufficient amount of nutrients, the bacteria grows in number as they can divide on their own however the viruses cannot increase in number as they can divide only by entering and using the cellular machinery of a living organism.
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endoplasmicreticulum defination
Answer:
Explanation:
a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis.
Answer:
Explanation:
a network of membranous tubules within the cytoplasm of a eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis.
Which of Kepler's laws states that planets travel in an ellipse with the Sun at one focus?
Answer:
Kepler's first law
Explanation:
The sweat glands that produce a watery substance and are associated with exercise and stress are the _________ sweat glands, while glands that produce an organic substance that causes body odor are the __________ sweat glands.
Answer:
1 ) eccrine gland
2 ) apocrine sweat gland
Explanation:
1. eccrine gland: The major sweat glands of the human body, found in virtually all skin, produce a clear, odorless substance, consisting primarily of water and NaCl.
2. apocrine sweat gland: The type of sweat gland that is least responsible for thermoregulation and most responsible for body odor.
#If i'm wrong, i'm sorry
what are 2 major sources of atmospheric carbon?
Answer: natural and human activities. Natural sources of carbon dioxide include most animals, which exhale carbon dioxide as a waste product.
Explanation:
Why does a muscle return to its original length after being stretched?
*It is elastic.
It is malleable.
It is extensible.
It is contractible.
Answer:
a. It is elastic.
Explanation: is correct. post protected
Why do plants have more dead tissues compared to animals
Answer:
They have more dead tissues because it is needed for strength in order to stand upright and withstand most unfavourable environmental factors. skeleton to animals is like dead tissues to plant.
How do cats purr? Why do they purr?
Answer: While purring is thought to be partly voluntary and partly instinctive, research suggests that cats can purr for various reasons, using the soft rumble as a way of communicating and as a form of self-soothing or even healing. This is why cats will often purr when they're injured, or after a stressful event.
Explanation:
They pur cause they r happy
CAN SOMEONE HELP WITH THIS PLSSSS?!?!
Answer:
b is yes
Explanation:
there are 3 chromosomes in 21 instead of just 2
Answer:
B. Yes
C. 21
D. Trisomy 21
E. Down Sydrome
True or False: Skin is a nonspecific defense mechanism.
Answer:
True
Explanation:
Which of these is a layer inside Earth that provides energy that drives plate tectonics?
A. mantle
B. lithosphere
C. magnetosphere
D. continental crust
What are some ways that your body may need to create new cells?
Answer: First, existing cells can divide via a fairly simple process called mitosis. During mitosis, a parent cell splits into two new cells. These new cells, called daughter cells, are basically copies of the original cells. The second way that cells are created is from stem cells.
Explanation:
if an atom contains 8 protons and 10 neutrons, what is its atomic number?
Answer:
The atomic no. is 8
Explanation:
# of protons = atomic number.
In this case the atom is Oxygen
An oxygen ion has 8 protons and 10 electrons. The number of protons tells us the identity of the element because the number of protons is the same.
So, fluorine has 8 protons and 10 neutrons.
¿Qué le pasaría a cualquier especie si no pudiera heredar las características que permiten la supervivencia y adaptación?
Answer:
It would die ,without the needed skills and characteristics to live in a specific environment
Which organisms release carbon dioxide during cellular respiration?
O only producers
O only consumers
✅both producers and consumers
***** c is the correct answer.
Answer:
All plants and animals
Explanation:
Answer:
c
Explanation:
All of the following are causes of mutations except: *
during meiosis, the sister chromatids separate during:
They separated during the Anaphase.
which of the following is a type of mineral
1. coal
2. concrete
3. steel
4.quartz
Answer:
4. quartz
Explanation:
A mineral is a naturally occurring, inorganic substance that has a crystalline structure. Both concrete and steel are not naturally occurring. They are man-made. Additionally, while coal is naturally occurring, it is a rock, and therefore does not have the needed crystalline structure.
What is the functional role of the t tubules?.
The transverse tubules (t-tubules) with regards to the cardiac muscles are invaginations of the surface membrane of cardiac ventricular myocytes
With regards to skeletal muscles, are located in the space between the two Sarcoplasmic reticulum (SR) cisternae.
In Skeletal muscles, they are tightly associated with the SR controlling the entry of action potentials into interior of muscle fiber. In cardiac muscles, these t-tubules which are rich in ion channels and are important determinant of cardiac cell function, that are important for excitation–contraction coupling, ensuring spatially synchronous Ca2+ release throughout the cell.Learn more about t-tubules: https://brainly.com/question/6763078
choose the correct answer
Answer:
the last option
Explanation:
just a guess
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Why are animals basically the only organism that store glycogen
Answer: Because glycogen is the storage form of glucose in animals and humans which is analogous to the starch in plants. Glycogen is synthesized and stored mainly in the liver and the muscles.
Explanation:
Which of the following would be true of heterochromatin but not of euchromatin?
A. It includes DNA primarily found in expressed genes.
B. It is accessible to enzymes needed for gene expression.
C. It appears more pale when observed microscopically.
D. It remains tightly coiled at the G1 phase.
I would choose the option D.
D. It remains tightly coiled at the G1 phase.
which gas in earth’s atmosphere helps living things make proteins?
A horse left the stable 10 minutes ago and is now running toward a river at 172metersperminute. If its velocity remains constant, how much time will it take the horse to run 3,010meters?
A team of scientists is excavating fossils from a rock layer. They discover fossils of trilobites, which are useful as index fossils. Which information about the rock layer is provided by the trilobite fossils
Answer:
The approximate or relative ages of the rocks and the fossils they contain.
The discovery of trilobite fossils in a rock layer provides important information about the age, environment, and depositional history of the layer that is in Option A, as the information can be used by geologists and paleontologists to better understand the geological history.
What are fossils?Trilobites are useful as index fossils because they are extinct and had a wide geographic distribution during the Paleozoic Era. The presence of trilobites in a rock layer indicates that the layer is from the Paleozoic Era, which spanned from about 541 million to 252 million years ago. Trilobites were marine organisms that lived in a variety of habitats, from shallow seas to deep ocean environments. The discovery of trilobite fossils in a rock layer suggests that the layer was deposited in a marine environment. The presence of trilobites in a rock layer can also provide information about the depositional history of the layer.
Hence, the discovery of trilobite fossils in a rock layer provides important information about the age, environment, and depositional history of the layer that is in Option A.
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question is incomplete, complete question is below
A team of scientists is excavating fossils from a rock layer. They discover fossils of trilobites, which are useful as index fossils. Which information about the rock layer is provided by the trilobite fossils
A)age, environment, and depositional history
B)skin
