nuclear envelope reappears

spindle dissolves

chromosomes uncoil

These processes occur during

telophase.

prophase.

anaphase.

metaphase.

Answer:

d

Explanation:

Answer:

It helps to support growth and helps producing energy to do vital functions.

Hope this helps!

A reliable DNA analysis is based on the DNA conditions. The importance of using undigested cells is that DNA is well-preserved, not affected by external factors, and can be used to compare it to database sequences.

------------------------------------------

Dr. Pringle studies niche partitioning and competition reduction among coexistent species in Africa.

He is interested in knowing the exact source of food of different herbivorous species. To do so, he is using the technique of DNA metabarcoding.

He collects fresh animals' dung and gets the indigested plant cells.

DNA is isolated, sequenced, and compared with the DNI of known species, which are a potential source of food for these animals.

Once he matches the cells' DNA with the corresponding plant species from the database, he can use this information to detail the animal's source of food.

The importance of getting fresh, undigested cells from the dung, is that

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Answer:

Since strong sun exposure damages the body, the solution was to evolve skin that was permanently dark so as to protect against the sun's more damaging rays. Melanin, the skin's brown pigment, is a natural sunscreen that protects tropical peoples from the many harmful effects of ultraviolet (UV) rays.

Explanation:

A helper T cell response to a protein antigen requires the participation of antigen-presenting cells (APCs) that express major histocompatibility complex class II (MHC II) molecules.

When a protein antigen is encountered by an APC, such as a dendritic cell, macrophage, or B cell, the antigen is internalized, processed, and presented on the cell surface in association with MHC II molecules.

MHC II molecules are responsible for presenting antigenic peptides to helper T cells. These MHC II-peptide complexes on the surface of the APC act as recognition signals for helper T cells.

Helper T cells have specific T cell receptors (TCRs) on their surface that can recognize and bind to the antigen-MHC II complex. This interaction between the TCR on the helper T cell and the antigen-MHC II complex on the APC is essential for initiating the helper T cell response.

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Answer:

B

Explanation:

Both have pharyngeal arches and slits when they are embryos. If you look up an image of both embryos you can clearly see this.

Try this class experiment to detect the presence of enzymes as they catalyse the decomposition of hydrogen peroxide

Enzymes are biological catalysts which increase the speed of a chemical reaction. They are large protein molecules and are very specific to certain reactions. Hydrogen peroxide decomposes slowly in light to produce oxygen and water. The enzyme catalase can speed up (catalyse) this reaction.

In this practical, students investigate the presence of enzymes in liver, potato and celery by detecting the oxygen gas produced when hydrogen peroxide decomposes. The experiment should take no more than 20–30 minutes.

Equipment

Apparatus

Eye protection

Conical flasks, 100 cm3, x3

Measuring cylinder, 25 cm3

Bunsen burner

Wooden splint

A bucket or bin for disposal of waste materials

Chemicals

Hydrogen peroxide solution, ‘5 volume’

Small pieces of the following (see note 4):

Liver

Potato

Celery

Health, safety and technical notes

Read our standard health and safety guidance.

Wear eye protection throughout. Students must be instructed NOT to taste or eat any of the foods used in the experiment.

Hydrogen peroxide solution, H2O2(aq) – see CLEAPSS Hazcard HC050 and CLEAPSS Recipe Book RB045. Hydrogen peroxide solution of ‘5 volume’ concentration is low hazard, but it will probably need to be prepared by dilution of a more concentrated solution which may be hazardous.

Only small samples of liver, potato and celery are required. These should be prepared for the lesson ready to be used by students. A disposal bin or bucket for used samples should be provided to avoid these being put down the sink.

Procedure

Measure 25 cm3 of hydrogen peroxide solution into each of three conical flasks.

At the same time, add a small piece of liver to the first flask, a small piece of potato to the second flask, and a small piece of celery to the third flask.

Hold a glowing splint in the neck of each flask.

Note the time taken before each glowing splint is relit by the evolved oxygen.

Dispose of all mixtures into the bucket or bin provided.

Teaching notes

Some vegetarian students may wish to opt out of handling liver samples, and this should be respected.

Before or after the experiment, the term enzyme will need to be introduced. The term may have been met previously in biological topics, but the notion that they act as catalysts and increase the rate of reactions may be new. Similarly their nature as large protein molecules whose catalytic activity can be very specific to certain chemical reactions may be unfamiliar. The name catalase for the enzyme present in all these foodstuffs can be introduced.

To show the similarity between enzymes and chemical catalysts, the teacher may wish to demonstrate (or ask the class to perform as part of the class experiment) the catalytic decomposition of hydrogen peroxide solution by manganese(IV) oxide (HARMFUL – see CLEAPSS Hazcard HC060).

If students have not performed the glowing splint test for oxygen for some time, they may need reminding of how to do so by a quick demonstration by the teacher.

Additional information

This is a resource from the Practical Chemistry project, developed by the Nuffield Foundation and the Royal Society of Chemistry. This collection of over 200 practical activities demonstrates a wide range of chemical concepts and processes. Each activity contains comprehensive information for teachers and technicians, including full technical notes and step-by-step procedures. Practical Chemistry activities accompany Practical Physics and Practical Biology.

i wan na just say so coll like every blurry vision✌

Extinction of bottom dwellers is the least likely result of increased sediment in waterways. Thus, the correct option will be C.

Sedimentation is the phenomenon which results in the formation of depositional landforms and also the rocks which constitute the sedimentary records. The building up of various land surfaces through the process of sedimentation, which takes place particularly in the river valleys, and this is called as aggradation.

The sediments which are formed in a waterway's bed, banks and also the floodplain have been transported from higher region in the catchment and are deposited there by the flow of water. Extinction of the bottom-dweller species is the least likely result of the increased sediment in the waterways.

Therefore, the correct option will be C.

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Answer:

el cuerpo humano necesita células para crecer para que pueda crecer por sí mismo. las células necesitan glucosa y oxígeno para crecer y sobrevivir

Explanation:

The most common type of cancer is carcinoma. This type of cancer arises from epithelial cells which make up the majority of tissues in our bodies.

Examples of carcinomas include lung, prostate, colon, and breast cancers. While sarcoma, leukemia, lymphoma, and breast cancer are all common types of cancer, they are not as prevalent as carcinomas. It's important to note that the incidence of cancer varies depending on factors such as age, gender, and lifestyle choices.

It's always a good idea to practice healthy habits like regular exercise, maintaining a balanced diet, and avoiding tobacco and excessive alcohol consumption to reduce your risk of developing cancer.

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Answer:

The word "animal" comes from the Latin animalis, meaning having breath, having soul or living being. The biological definition includes all members of the kingdom Animalia. In colloquial usage, as a consequence of anthropocentrism, the term animal is sometimes used nonscientifically to refer only to non-human animals.

:-))

Answer:

animals are the most advanced organisms onthe planet. They are animals because they cannot work like us humans and are not having big brains like us.

Anabolism and catabolism are two opposing metabolic processes in living organisms. Anabolism is the process of building complex molecules from simpler ones, while catabolism is the process of breaking down complex molecules into simpler ones.

In anabolism, the body uses energy to synthesize complex molecules like proteins, nucleic acids, and polysaccharides from simpler molecules like amino acids, nucleotides, and monosaccharides. This process requires energy and is usually used for growth, repair, and maintenance of the body.

In catabolism, the body breaks down complex molecules like proteins, nucleic acids, and polysaccharides into simpler ones like amino acids, nucleotides, and monosaccharides. This process releases energy which can be used for various physiological functions like muscle contraction, cellular respiration, and body temperature regulation.

In summary, anabolism and catabolism are two opposing processes that occur in living organisms. Anabolism builds complex molecules from simpler ones and requires energy, while catabolism breaks down complex molecules into simpler ones and releases energy.

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Ectoderm: central nervous system, peripheral nervous system, epidermis Mesoderm: notochord, kidney tubule cells, skeletal muscle Endoderm: red blood cells, thyroid follicular cells, lung alveolar cells, pancreatic acinar cells

I'll list the germ layers and their corresponding tissues or structures:
Ectoderm:
- Central nervous system
- Epidermis
- Peripheral nervous system
Mesoderm:
- Red blood cells
- Notochord
- Kidney tubule cells
- Skeletal muscle

Endoderm:
- Thyroid follicular cells
- Lung alveolar cells
- Pancreatic acinar cells

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Answer:

Malaria-mosqitoes

Cholera- contaminated food and water

pneumoni- cought droplets

Explanation:

malaria-people get malaria by being bitten by an infective female Anopheles mosquito. Only Anopheles mosquitoes can transmit malaria and they must have been infected through a previous blood meal taken from an infected person.

Cholera-The cholera bacteria is passed through feces (poop). It is spread by eating or drinking food or water contaminated by the feces (poop) of an infected person. This occurs more often in underdeveloped countries lacking proper water supplies and sewage disposal.

Pneumonia-The viruses and bacteria that are commonly found in a child's nose or throat, can infect the lungs if they are inhaled. They may also spread via air-borne droplets from a cough or sneeze. In addition, pneumonia may spread through blood, especially during and shortly after birth

Answer:

Neurons aren't able to communicate with each other.

Answer: D

Explanation:

Answer:

on edge here's the correct answer

Explanation:

Answer: It is D)

Explanation:

Therian mammals, including marsupials and eutherians, may be identified and discriminated by the quantity, form, and replacement pattern of their teeth.

However, some early Mesozoic fossils with therian characteristics have been discovered in Mongolia, and these cannot be definitively assigned to one of the groups;

that is, we do not know which group of therian mammals they belong to, or whether they belong to another closely related group that has since become extinct.

The infant molars are replaced by teeth known as premolars (also known as bicuspids). A whole adult dentition consists of 32 teeth, 16 on top and 16 on bottom.

The primary dentition is replaced by permanent central incisors, lateral incisors, canines, and first and second premolars. The permanent premolars replace the primary molars, and the permanent molars erupt posterior to those.

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Answer:

Humans undergo respiration, this is when we breath "respiration" is also connected to the Spanish word "respirar" which means "breath" only plant life can do photosynthesis.

Explanation:

Explanation:

In sexual both parents are involved

Answer:

C. Protection

Explanation:

Answer:

In some cases of head injuries, the cerebrum may be affected. This type of injury could cause a loss of breathing regulation  reflexive movement  voluntary movement and impaired heart rate  involuntary movement  speech

Explanation:

Answer:

The first blank is voluntary movement and the second one is speech

Explanation:

The correct sequence of structures through which urine flows after its formation in the nephron is renal pelvis, ureter, urinary bladder, and urethra. Thus, option (b) is the correct answer.

Urine is a liquid waste product that is excreted from the body by the kidneys. It is made up of water, ions, and other waste products that have been filtered from the blood by the kidneys.

Urine is transported from the nephron to the renal pelvis, then to the ureter, which carries the urine to the urinary bladder. The urinary bladder holds urine until it is ready to be excreted from the body.

Finally, urine is released from the body via the urethra.

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ATP is derived from the breakdown of molecules of glucose. Glycolysis is

the metabolic reaction which converts glucose into ATP.

The energy in glucose has to be converted to a usable form by the cells

which is why it is always converted to ATP( Adenosine triphosphate). The

energy supplied by ATP is then used to perform various activities in the

body.

Glucose is a type of carbohydrate which is a means of energy in organisms.

The explanations given validates ATP has been derived from the

breakdown of molecules of glucose.

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Answer:

glucose

Explanation:

I got it correct on test

Coral reefs are underwater structures made from calcium carbonate secreted by corals. Corals are colonies of tiny living animals found in marine waters that contain few nutrients. Most coral reefs are built from stony corals, which in turn consist of polyps that cluster the groups. Coral reefs flourish even though they are surrounded by ocean waters that provide nutrients. They are most commonly found at shallow depths in tropical waters, but deep water and cold water corals also exist on smaller scales in other areas.

Mangroves are tropical trees and shrubs that grow in inter tidal areas. They can also refer to the forest communities with their associated microorganisms(bacteria, fungi, algae) and fauna(crabs, shrimps and fish).Because they are exposed to extreme environmental factors of high salinity, alternating water saturation and desiccation, and anaerobic substrates. Mangroves is the only species of tree which flourishes in sea water. Coral reef and mangrove is very important to us so we need to nourish and take care of it. Because if this two will destroy we are the one who will suffer.

Hope this will help ;)

the orbital period of the planet with an average distance to the sun of 4.54 AU is approximately 3.32 million years.

The orbital period of a planet is the time it takes for the planet to complete one orbit around the sun. This period depends on the distance between the planet and the sun and the mass of the sun. Kepler's third law of planetary motion provides a mathematical relationship between the orbital period of a planet, its distance from the sun, and the mass of the sun. The law states that the square of the period of a planet's orbit is proportional to the cube of its average distance from the sun. In other words, the equation for Kepler's third law is:

where T is the period of the planet's orbit, r is the distance between the planet and the sun, G is the gravitational constant, and M is the mass of the sun.

To calculate the orbital period of the planet with an average distance to the sun of 4.54 AU, we can use the equation for Kepler's third law. First, we need to convert the distance from AU to meters. One astronomical unit (AU) is equivalent to 149,597,870,700 meters. Therefore, the distance of the planet from the sun is:

Next, we need to calculate the mass of the sun. The mass of the sun is approximately 1.99 x 10^30 kg.

Substituting the values into Kepler's third law equation, we get:

Finally, we can convert the time from seconds to years by dividing by the number of seconds in a year (3.15 x 10^7 seconds):

T = 1.05 x 10^14 seconds / (3.15 x 10^7 seconds/year) = 3.32 x 10^6 years

Therefore, the orbital period of the planet with an average distance to the sun of 4.54 AU is approximately 3.32 million years.

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Based on the provided data, we can determine the most likely ecological roles of the organisms regarding their mode of nutrition (autotroph or heterotroph) as follows:

Organism V: Autotroph. It is multicellular, indicating a complex structure that can support photosynthetic processes.

Organism W: Heterotroph. It is multicellular and lacks chloroplasts, suggesting it does not possess the ability to perform photosynthesis.

Organism X: Autotroph. It lacks multicellularity but has chloroplasts, which are responsible for photosynthesis in autotrophs.

Organism Y: Heterotroph. It is multicellular, lacks chloroplasts, and does not possess cilia, suggesting it relies on external food sources.

Organism Z: Heterotroph. It lacks multicellularity, does not have chloroplasts, and has a cell wall. These characteristics indicate a heterotrophic nature.

Model F is the best model for prokaryotic cell

Description of the best model of a prokaryotic cell: Cell Membrane, Cytoplasm, DNA, Nucleoid, Ribosomes, Cell Wall, Flagella, Fimbriae.

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Answer:

can not answer without the rest of the question

Explanation: