The point in a eukaryotic cell cycle at which DNA condenses to from visible chromosome?
Answer:
Prophase
Explanation:
There are different stages in the eukaryotic cell cycle. Different cellular occurrences are found in each of this stages. The stages include; prophase, metaphase, anaphase, telophase etc.
Prophase, which is the first division stage, is characterized by the dissociation of the nuclear membrane, tightening of DNA coils called chromatin by condensin proteins (condensation) to form X shaped visible chromosomes.
The graph shows the history of human population growth
Answer:
exponential growth, c.
Exponential growth is iconic for ramping up, resulting in a near vertical line by the time its really going.
What factor is described as sexual
selection?
A. non-random mating
B. migration
C. small populations
D. natural selection
Answer:
D Natural Selection
Explanation:
Species choose mates to reproduce with naturally.
Help!
Which of the following strategies can reduce urban sprawl?
A. Increasing the number of green belts
B. Decreasing the length of city blocks
C. Creating expensive housing in the city
D. Eliminating high-rise homes and offices
Answer:A
Explanation:
As the human population grows, some minerals in everyday products could
become scarce. Which of the following is the best way to address this
problem?
A. Explore uses of more plentiful minerals.
B. Use more energy to locate existing minerals.
C. Move human communities to uninhabited areas.
D. Construct more and larger-sized landfills.
Answer:
B. Explore uses of more plentiful minerals
What type of selection occurs when individuals
with traits at either extreme have higher
fitness than those individuals in the middle?
A. directional
B. stabilizing
C. disruptive
Disruptive type of selection occurs when individuals with traits at either extreme have higher fitness than those individuals in the middle. Hence option c is correct.
Natural selection happens when people with a particular genotype have a higher chance of surviving, reproducing, and passing on their alleles to the following generation than individuals with a different genotype.
When those at the upper and lower extremities of the curve are more fit than people in the middle, disruptive selection takes place. Disruptive selection targets people of an intermediate type, and it can result in the emergence of two different phenotypes.
African seed cracker birds' various beak sizes show evidence of disruptive selection. The beaks of the birds vary in size, and they eat seeds. There were two different sizes of seeds available: tiny and large.
To know about disruptive
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write at least three difference between arteryand vein with diagram
Answer:
Difference Between Artery and Vein Artery 1. Vessels which carry blood from the heart to various body parts 2. Arteries carry oxygenated blood from the heart except pulmonary artery 3. Arteries have thick elastic muscular walls 4. Valves are absent 5. Blood flows under high pressure Vein 1. Vessels which carry blood from the various body parts to the heart 2. Veins carry deoxygenated blood from the various body parts except pulmonary vein 3. Veins have thin non elastic walls 4. Valves are present to prevent the backward flow of blood 5. Blood flows under low pressureWhich of the following is a cost of using dams as a source of freshwater
Answer:
WHAT IS THE CUTTING DOWN OF TREES
Explanation:
YOU CUT DOWN OUR PRECIOUS TREES TO BUILD THE DAMS
why are living organisms classified?
Answer: See explanation
Explanation:
An organism refers to a living thing which can react to stimuli, move, grow, has an organized structure, reproduce, and can adapt.
Living organisms can be classified into kingdom, phylum, classes etc. The reason the classification of living organisms include:
1. Gives information about diversity of living organisms.
2. Easy identification of the organisms
3. Shows inter-relationship among the organisms.
4. Helps in understanding the evolution of the living organisms.
living organisms are classified so that it becomes easier for us to examine or study organisms
PLS HELP ILL GIVE BRAINLIST!!!!!!
2. What characteristics are shared by most cells?
a. Most cells have membrane-bound organelles and a nucleus.
b. Most cells contain cytoplasm, are enclosed by a membrane, and have a nucleus. Most cells are microscopic, enclosed by a membrane, and contain cytoplasm.
c. Most cells are microscopic, enclosed by a membrane, and contain cytoplasm.
d. Most cells can be seen by the unaided eye and are enclosed by a membrane.
Explanation:
Ans. B
* I am not sure about this answer, if I am wrong pls correct my mistake.
Explanation:
the correct answer is B
hope it helps you
Which motion of particles across a membrane requires energy?
from high concentration to low concentration
from low concentration to high concentration
with no concentration gradient
through dynamic equilibrium
Answer:
B
Explanation:
Edge 2021
The motion of particles across a membrane from low concentration to high concentration requires energy. This process is called active transport. So, the correct option is B.
What is Active transport?Active transport, which requires energy in the form of ATP (adenosine triphosphate) or another energy source, is the movement of particles or molecules across a membrane from a region of low concentration to an area of high concentration, against the concentration gradient.
Numerous cellular functions, including the absorption of nutrients and the elimination of waste materials, depend on this mechanism. The sodium-potassium pump and the proton pump are two examples of active transport since they both employ ATP to move ions across cell membranes.
Therefore, the correct option is B.
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What is significant about the homeotic genes
in many different organisms?
A. They are all very different in every individual organism.
B. They cause the organisms to evolve.
C. They are similar among organisms early on in development.
D. They control small specific functions in the cell.
Answer:
they control small specific functions in the cell
Explanation:
genes are very crucial in every organisms since they determine the tiniest composition of the cell,evolving from the parent organism.
Answer: it’s c
Explanation:I just answered question
In an animal, which part of the cell is responsible for keeping viruses out?
Answer:
here's your answer
Explanation:
Once attached to a host cell, animal viruses may enter in a variety of ways: by endocytosis, where the membrane folds in; by making channels in the host membrane (through which DNA or RNA can be injected); or, for enveloped viruses, by fusing with the membrane and releasing the capsid inside of the cell.In an animal cell, the lysosome is an organelle of the cell that is responsible for destroying the virus. The virus can enter the cell via endocytosis, but the lysosome can degrade and destroy it to protect the cell.
What is the function of the immune cell?Immune cells such as neutrophils, macrophages, and others play a role in protecting the body from foreign harmful pathogens. They have specific structures for doing so.
Because not all body cells have MHC II or toll-like receptors, cells have different organelles to protect themselves. Cells have lysosomes within them. Lysosomes have an acidic environment that can degrade viral proteins.
When the virus is phagocytosed by the cell, it combines with the lysosome. The lysosome degrades the virus with the help of hydrolyzing enzymes and throws it out of the cells. These are collected by other cells.
Hence, the lysosome of the cell degrades the virus and keeps it out.
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Please help me with this! *30 *points Picture included
Answer:
1.) The first picture is mitochondria and the second picture is chloroplast
2.) The second one is only in plants
3.) The first one is found more commonly in animal cells
4.) Glucose & oxygen goes into #1 and releases ATP energy and water & carbon dioxide (waste) during cellular respiration
5.) Sunlight and water goes into #2 and releases oxygen (waste)
6.) The waste product from mitochondria is what the chloroplast needs to perform photosynthesis and vice versa for mitochondria where the waste product from the chloroplast is what mitochondria needs to make ATP energy
7.) They both have folds and membranes because this is how energy is transferred from one place to another.
Explanation:
what team was credited with laying the foundation of understanding DNA with x-ray crystallography studies?
write four different between parenchyma and collenchyma?
Answer:
The major distinction between parenchyma, collenchyma, and sclerenchyma cells is that parenchyma cells are engaged in photosynthesis, storage, and secretion, whereas collenchyma cells support and transport nutrients, and sclerenchyma cells support, protect, and transport water.
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I need help not sure what to do
Answer:
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How many phylums are there in the kingdom animalia
Answer:
31 phylums in anamalia kindgom
Explanation:
there is no guarantee that this is the correct answer if the number of phylums are changing
what is science?????
Answer:
Science is the study of nature around us.
Answer:
As scientist discovered that Science is the method of learning everything about the natural world.
what is photosynthesis?
Answer:
i have written in simple language hope it help u
Explanation:
the process in which green plants prepare their own food with the help of sunlight, water and carbon dioxide is known as photosynthesis.
What is true of increased levels of CO2 in the atmosphere?
A. It's poisonous to plants.
B. It helps some plants grow better, while others experience less growth.
C. It reduces the amount of climate change.
D. It always helps plants grow.
Answer:
D
Explanation:
.
What are the possible offspring outcomes if Parent 1, Tt , crosses with Parent 2, tt ?
Tt , tt
TT , tt
All tt
Answer:
2nd answer
Explanation:
if wrong sorry
According to the punnet square for this cross, what percentage of offspring is predicted to have blue feathers?
Categorize the food items below by selecting which macromolecule they are known to contain.
apple
steak
celery
olive oil
potato
avocado
egg
DONE
HELPP
Why is it important that oxygen and carbon dioxide levels be closely regulated in the human body?
A) Both gases are needed for the proper functioning of cell processes
B) Oxygen is needed for cell processes and carbon dioxide is a waste product
C) Both gases are waste products that need to be removed from cells
D) The carbon and oxygen from the gases are needed to build new molecules.
Answer:
B) Oxygen is needed for cell processes and carbon dioxide is a waste product
Explanation:
Cellular respiration refers to the cellular mechanism by which organisms combine molecular oxygen (O2) with organic compounds obtained from foods, it is a chemical reaction that releases 1-energy (ATP), which is used by cells to carry out its functions, 2-carbon dioxide (CO2) and 3-water (H2O). During the gas exchange, O2 is first transported from the lungs to the blood cells, which subsequently deliver nutrients and O2 to all cells of the body. Simultaneously, CO2 diffuses from cells to tissue capillaries, and then this waste product passes from the bloodstream to the lungs where is eliminated.
How do consumers obtain the carbon that they need for their life processes?
They breathe it in from the surrounding air.
They break down the plants and animals they eat.
They absorb it from the surrounding soil.
They absorb it from water through their pores.
Explanation:
They break down the plants and animals they eat
this is because, plants absorb carbon from the atmosphere to grow in the process of photosynthesis, then consumers obtain their food from plants hence obtaining carbon
Answer: B. They break down the plants and animals they eat.
Explanation:
Just got it right on edge
Hippopotamuses live in Africa’s rivers and lakes. They’re herbivores and coexist with other herbivores and carnivores. Which action could lead to a decrease in the number of hippos?
Answer:
If any of the other carnivores are predator they might eat the hippos. If the other herbivores population incresses there food supply may drop. If there is a drought there habitat will be in danger. Pouchers are also a threat to this animal.
Explanation:
In the ocean, plants and other photosynthetic organisms take in carbon. This carbon is transferred through the food web into the depths of the ocean. Large amounts of carbon dioxide from the atmosphere also constantly dissolve into the ocean. Water currents transfer the water containing this carbon dioxide down toward the bottom of the ocean. Which statement is best supported by this information?
A.
Oceans are carbon sinks because they emit carbon into the atmosphere.
B.
Oceans are carbon sources because they emit more carbon than they absorb.
C.
Oceans are carbon sinks because they store more carbon than they emit.
D.
Oceans are carbon sources because they absorb carbon from the atmosphere.
Answer:
C. Oceans are carbon sinks because they store more carbon than they emit.
Explanation:
Oceans are carbon sinks because they store more carbon than they emit. Most of the carbon is produced in the respiration process as well as burning of fossil fuels. This carbon moves to the atmosphere and dissolved into the ocean which is required by the vegetation of ocean. Due to this carbon, vegetation produced more food for the organisms. About 25% of all CO2 emissions are absorbed by the ocean. Source is the part of a plant where materials are produced e.g. leaves whereas Sink refers to the part of the plant where the substrate can be stored e.g. roots or stem for starch.
In maize, yellow kernel color is dominant to white, and wrinkled kernel shape is dominant to the smooth form. Considering both of these traits jointly in self- fertilized dihybrids, the progeny appeared in the following numbers: 193 white, genes assort independently? Support your conclusion using appropriate statistical analysis. wrinkled; 184 yellow smooth; 556 yellow, wrinkled: 61 white smooth
Answer:
yellow, wrinkled are high in population whereas white smooth is lower in population.
Explanation:
Due to self-fertilized dihybrids, the offspring are yellow wrinkled, hybrid and white smooth. 556 yellow, wrinkled are high in population because of the dominant allele while on the other hand, 61 white smooth are obtained and less in number due to recessive nature that comes very little in the population. 184 yellow smooth and 193 white, wrinkled are the hybrid offspring that has both different characteristics from their parents.
What is the function of hemoglobin in the body?
A) It binds with oxygen in red blood cells and it is carried to all parts of the body
B) It carries carbon dioxide around the body mainly
C) It causes stomach ulcers/stomach pain/gas
D) It is a protein marker determining our blood type
Answer:
A
Explanation:
Answer:
A....it binds with oxygen in red blood cells and it is carried to all parts of the body
Explanation:
haemoglobin binds with oxygen to form oxy- haemoglobin..and transported to where it's needed for example cells for metabolism
