Answer:
Chromatid refers to one half of the chromosome. Centromeres are the center of the chromosomes, where spindles attach during mitosis.
Why can the River Nile be seen from space?
One of the three lines of defense against pathogens is ________?
Answer:
one of the three lines of defense against pathogens is surface barriers that prevent the entry of pathogens into the body.
Explanation:if its right pls mark brainliest
Which of the following is true about natural selection?
O It can only act on traits that are heritable and show variation
o It allows species to choose what adaptations are passed onto offspring.
O It always favors large, strong individuals.
o It acts on individual organisms, helping them become better adapted to their environment.
Answer:
A
Explanation:
If you find a blood worm, but no animals from group A or B, the pollution level would be?
Which of the following is not true of energy in a cell?
The cell must have energy to maintain homeostasis.
O Energy can be created by the cell.
O The cell uses mostly chemical energy.
O Energy can be converted by the cell.
Answer:
I think is the top one A hope this helps
Cells have a different function it can convert chemical energy to another form of energy to maintain homeostasis, and cells cannot create energy only change the form of energy, hence option b is correct.
What is the energy of the cell?Every cell must continue to check its levels of energy and adjust ATP production rates in line with metabolic demand in order to keep homeostasis.
The ability of cells to sense, and convert nutrients into chemical energy is essential for the continuous fulfillment of this energy demand.
To drive metabolic reactions that would not happen automatically, to transfer necessary substances across membranes, and to do mechanical work, such as moving muscles, cells need chemical energy.
Therefore cells use energy to maintain homeostasis and can change one form of energy into another but can not create energy, hence option b is correct.
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What is Metabolism? In a simple answer.
Answer:
Metabolism is the process by which your body converts what you eat and drink into energy.
The alterations in an organism's or a cell's chemistry. The term metabolism broadly refers to the chemical processes that take place in an organism's cells to support life.
What is Metabolism?The word "metabolism" in a cell may be defined as all the chemical processes that take place within the cell to carry out all cellular tasks e.g., growth, development, and reproduction.
Anabolic processes, which often need an input of energy held in the chemical bonds of complex molecules, are distinguished from catabolic events, which typically entail the release of energy and the breakdown of bigger molecules into simpler ones.
These modifications generate the ingredients and energy that cells and organisms require to develop, procreate, and maintain health.
Therefore, metabolism broadly refers to the chemical processes that take place in an organism's cells to support life.
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a chromosome that is not a sex chromosome
Answer:
There are 22 pairs of chromosomes that are not sex chromosomes (called nonsex chromosomes, numbered chromosomes, or autosomal chromosomes)
4.
Which is found in a plant cell and not in an animal cell?
A
cytoplasm
В
glycogen granules
с
nucleus
D
starch grains
Answer:
Plastids, chloroplasts, and vacuoles are found in plant cells but not in animal cells.
Explanation:
In which stage of meiosis has DNA undergone some type of mixing?
o before DNA replication
O after DNA replication
O during meiosis
O during meiosis II
Answer:
l think it's answer is
after DNA replication
Answer:
suppose it's item c
Explanation:
because In meiosis I, we face the process of cross over which some of the genes would be transfered.
The plates of the crust move around slowly and bump into each other creating all of the following EXCEPT __________.
A) hurricanes
B) mountains
C) new seafloor
D) earthquakes
Which is a best practice to help conserve the natural environment?
Apply water daily, whether it has rained or not.
Capture methane gas emissions from manure and use it as natural gas.
Dispose of manure in landfills.
Do as much tilling as possible.
Answer:
Capture methane gas emissions from manure and use it as natural gas.
Explanation:
Capturing methane gas emissions from manure and using it as natural gas is a best practice to help conserve the natural environment. Hence, option B is correct.
What is natural gas?Although ethane, propane, butane, and pentane are present in trace amounts, methane makes up the majority of natural gas. Four hydrogen atoms and one carbon atom make up the methane molecule. In homes across the United States and much of the rest of the world, natural gas has slowly risen to the top of the energy usage list. Compared to more conventional fossil fuels like coal and other hydrocarbons like crude oil, it is more efficient.
Natural gas is used in the business sector to heat buildings and water, run refrigeration and cooling systems, cook, dry clothing, and provide outdoor lighting. Natural gas is sometimes used as a fuel in combined heat and power systems by some commercial consumers.
Capturing methane gas emissions from manure and using it as natural gas is a best practice to help conserve the natural environment. Hence, option B is correct.
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What are the functions of hormones in plants?
Answer:
There are many things that hormones do to plants.
Explanation:
First, they can help the growth of the plant, they can also help the plant respond correctly to other natural stimulus like weather or a change in temperature. They also help in cell division.
Which organelle is correctly matched with the cell process it performs?
a. Nucleus -makes energy for cell to survive
b. Cell membrane - semi-permeable; controls what comes in and out of the cell
C. Mitochondria - makes proteins
d. Ribosome - the "control center" of the cell
Answer: B
Explanation:
which of the following are key elements of darwin's theory of evolution by natural selection?
Answer:
Independent assortment and crossing over contribute to diversity within a population's gene pool. These processes occur during meiosis and result in the recombination of DNA.
Explanation:
♥☺ hope it helped
The three pillars of Darwin's theory of evolution are genetic variety, fitness, and adaptation. Overproduction and competition are other crucial components of this process.
What Darwin's theory of evolution by natural selection?Charles Darwin's theory of evolution is known as natural selection. Due to the limited supply of resources in nature, animals have inherited traits that aid in both survival and reproduction.
Typically, produce more offspring than their contemporaries, leading to an increase in the frequency of such traits across successive generations.
Natural populations exhibit variation, and every population has more offspring than the environment can support. The result of this Overproduction is that those people who have the highest level of environmental genetic fitness will have offspring who are better able to compete in that environment.
Therefore, Genetic variation, fitness, and adaption are all factors in Darwin's theory of evolution.Overproduction and competition are other crucial components of this process.
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What happened to the jaw bone ?
Answer:
Jawbone, known at the beginning as AliphCom, first stood out for the quality of its headphones and wireless speakers and later, for its wearables.
The willingness to find new market niches to jump into them meant that finding investors was never a problem for this company.
Do you believe your house would be prepared in the event of a tsunami? Why or why not?
Answer:
Yes because we don’t live by an ocean
Explanation:
Answer:
Just say no. If there is a tsunami, the average modern day house would be flooded and sustain significant structural damage. It would not be able to withstand the crushing forces of the water unless it is specially built. Assuming that you don't live in an area where tsunamis are likely, your house was not built that way.
Explanation:
1. do you feel the ends of the ruler pushing against your hands?
2. what will happen to the ruler as you release it?
3. what was stored as you bent the ruler using your left hand?
4. what will happen to the ruler as you take away your left hand quickly?
Answer:
Due to stored energy, the ruler moves in forward direction.
Explanation:
When we bent the ruler from its original position, energy is stored in the ruler so when we remove the hands from the ruler so it moves in the forward direction. When the ruler reaches to its original position so due to more stored energy, it moves more forward than its original position and vibrate on its mean position and finally remain at rest after sometime.
explain photosynthesis in 3 stages (you may include more) you must use the following vocabulary words in your written explanation and underline them:chloroplasts chlorophyll stomata oxygen carbon dioxide raw material, products, glucose) sure to Define and state carbon dioxide role in the process and explain oxygen and why it's a byproduct
Answer:
Write one page about something that happened to youWith interest Grammar
The process by which plants convert carbon dioxide, water, and sunshine into oxygen and sugar-based energy is known as photosynthesis.
What is Photosynthesis?Plants absorb water (H2O) and carbon dioxide (CO2) from the soil and atmosphere during photosynthesis. Water is oxidized, which means it loses electrons, while carbon dioxide is reduced, which means it receives electrons, inside the plant cell.
Water is converted into oxygen and carbon dioxide into glucose as a result. After storing energy within the glucose molecules, the plant releases the oxygen back into the atmosphere.
Light-dependent reactions and light-independent reactions are the two main stages of photosynthesis. The light-dependent reaction, as its name implies, occurs inside the thylakoid membrane and necessitates a constant supply of sunshine.
Therefore, The process by which plants convert carbon dioxide, water, and sunshine into oxygen and sugar-based energy is known as photosynthesis.
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2) Which substance is a product of photosynthesis?
A)
C)
Nitrogen
Glucose
B)
D)
Water
Carbon dioxide
Answer:
Product of photosynthesis is Glucose
Nitrogen is necessary for building these two organic molecules:
O carbohydrates & lipids
carbohydrates & proteins
nucleic acids & lipids
nucleic acids & proteins
Answer:
D
Explanation:
the major constituents of carbohydrates are carbon, oxygen, and hydrogen while protein contains nitrogen,carbon, hydrogen,and some mineral elements, and lipids major constituents are carbon, hydrogen and little oxygen.
the nucleic acids are packed with histones, which is proteinous, and contain nitrogen too
which two waves lie at the begginning and end of the electromagnetic spectrum?
Answer:
radio waves and gamma rays
Explanation:
On one end of the electromagnetic spectrum are radio waves, which have wavelengths billions of times longer than those of visible light. On the other end of the spectrum are gamma rays
All of the following are TRUE except:
a. The environment contains all the materials and energy needed for living organisms to carry out their life activities
b. Living things and their environment affect each other
c. Ecology examines how everything is connected
d. Non-living things cannot affect living things in an environment.
Answer:
d
Explanation:
In multicellular organisms, some cells undergo meiotic division and produce haplold cells. This helps maintain a constant number of chromosomes over successive generations. Which colls are haplold colls?
Egg cell
Nerve cell
Liver cell
Sperm cell
Epithelial coll
Answer:
sperm
Explanation:
haploid cells are created through meiosis. The only cells that are produced through meiosis are sex cells/ gamelets.
PLEASE HELP!!!
In the space below, discuss some of the advantages and disadvantages of asexual and sexual reproduction. Compare and contrast individuals that are sexually and asexually reproduced. Use complete, meaningful sentences to explain the information you give as your answer.
Answer:
The advantages of sexual reproduction:
produces genetic variation in the offspring
the species can adapt to new environments due to variation, which gives them a survival advantage
a disease is less likely to affect all the individuals in a population
In asexual reproduction there is only one parent. The offspring are clones of the parent and each other.
The advantages of asexual reproduction include:
the population can increase rapidly when the conditions are favourable
only one parent is needed
it is more time and energy efficient as you don't need a mate
it is faster than sexual reproduction
The disadvantages of sexual reproduction:
time and energy are needed to find a mate
it is not possible for an isolated individual to reproduce
The disadvantages of asexual reproduction include:
it does not lead to genetic variation in a population
the species may only be suited to one habitat
disease may affect all the individuals in a population
Explanation:
Evolution occurs due to changes in time of the allele frequencies within a population.
True
False
Si las frecuencias permanecen constantes de una generación a la siguiente, la población no experimenta un cambio evolutivo.
If the frequencies remain constant from one generation to the next, the population does not undergo evolutionary change.
What reasoning correctly pairs a body system with its relationship to the digestive system?
Group of answer choices
excretory system; transports nutrients from the small intestine to other tissues
respiratory system; obtains oxygen so the energy in nutrients can be extracted
circulatory system; regulates and controls digestive functioning
nervous system; removes wastes from the blood
excretory system: removes waste from blood.
respiratory system: obtains oxygen so the energy in the nutrients can be extracted.
circulatory system: transports nutrients from small intestine to the othet tissues.
nervous system: regulates and controls digestive functioning.
( Am not completly sure, but i think this is the answer)
Three young children are fighting over where to take
Super Dog. Child X pulls the wagon, trying to go in the
direction of his house. Child Y pushes on the wagon
towards X's house. Child Z pushes the wagon in the
opposite direction. The forces the 3 children exert on the
wagon are 300 N, 500N, and 200N (not in any order).
The wagon isn't moving, how much force is child Z
pushing with?
Answer:
child Z exert 500N force to the wagon which is equal to that of child X and Y
Which of the following describes the most likely way in which two water molecules will interact?
Choose 1 answer:
Choose 1 answer:
(Choice A)
A
A covalent bond will form between the hydrogen of one water molecule and the oxygen of the other water molecule.
(Choice B)
B
A metallic bond will form between the hydrogens in each water molecule.
(Choice C)
C
A hydrogen bond will form between the hydrogen atom of one water molecule and the oxygen atom of the other water molecule.
(Choice D)
D
An ionic bond will form between the oxygens in each water molecule.
Answer:
C. A hydrogen bond will form between the hydrogen atom of one water molecule and the oxygen atom of the other water molecule.
Explanation:
Hydrogen bonds form between the hydrogen atom of one water molecule, and the adjacent water molecule of another water molecule, due to attraction between the positive and negative charges. This is called cohesion, and results in weak bonds between water molecules which constantly break and reform.
if four cells went through mitosis at the same time how many daughter cells would be formed?
If a dormant volcano starts to release gases and small earthquakes are recorded, what could this mean?
Answer: It means that its showing some volcanic activity that could lead into an eruption.
Explanation: Dormant volcanoes can show activity/signs that is could erupt. Gases, small earthquakes, loud explosions are signs of an eruption is going to occur. If a dormant volcano hasn't showed any activity for 2,000 years, its considered to be dead or extinct.
It indicates that there is some volcanic activity, which could lead to an eruption.
What is dormant volcano?Dormant volcanoes are those that have not erupted in a long time but are expected to do so in the future. Mount Kilimanjaro in Tanzania, Africa, and Mount Fuji in Japan are examples of dormant volcanoes.
Volcanoes become dormant when magma from the Earth's mantle can no longer reach them. Mount Rainier and Mount Fuji are examples of dormant volcanoes that are "sleeping" but may awaken in the future.
Dormant volcanoes can exhibit activity/signs that they are about to erupt. Gases, small earthquakes, and loud explosions are all indicators that an eruption is about to occur.
If a dormant volcano hasn't erupted in 2,000 years, it's considered dead or extinct.
Thus, this way, it indicates that it could lead to eruption.
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