Did birds retain any features from their theropod ancestors?

As matter and energy flow through different organizational levels of living systems, chemical elements are recombined in different ways to form different products.

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Answer:

g

Explanation:

The carbon cycle is a system that transfers carbon from one part of the environment to another.

The organelles in a cell that are involved in production and release of protein into the bloodstream are:

nucleus

ribosomes

Rough endoplasmic reticulum

Golgi apparatus

Secretory vesicles

The nucleus carries the blueprint for the synthesis of proteins.

The ribosomes are the protein forming factories of the cell.

The rough endoplasmic reticulum is responsible for synthesis of proteins for export out of the cell.

The golgi apparatus is responsible for protein modification and its export.

Secretory vesicles export the protein out of the cell through exocytosis.

Answer:

Plant pigments are important in controlling photosynthesis, growth and development of plants

Explanation:

Answer:

The main function of pigments in plants is photosynthesis, which uses the green pigment chlorophyll and many colorful pigments to absorb as much light energy as possible.

Answer:

Carbondioxide.

Explanation:

...............

Answer:

A

Explanation:

This is because the body inhales oxygen and exhales carbon-dioxide through the process of respiration

Explanation:

mhrssxxxx please mark as brainllest

Answer:

both plant and animals compote for resources

Answer:The weak bond between two hydrogen atoms, which is commonly found between water molecules and nucleotides in DNA, is called a hydrogen bond.

Explanation:

Answer: Hydrogen Bond

Explanation:

Oxygen will form oxyhemoglobin and not hemoglobin oxide because it is referred to as a`protein which binds to oxygen atoms in the blood.

This refers to a protein in the body which carries oxygen molecules to various parts of the body. This is as a result of the compound which is referred to as heme which is responsible for the high affinity for oxygen. It ensures oxygen is distributed to other parts of the body.

On the other hand, formation of oxides means that a chemical reaction occurred with oxygen. There is however no chemical reaction formed as a result of this affinity which is why there is no formation of hemoglobin oxide in this specific type of scenario in the body system.

This therefore is the reason why oxygen forms oxyhemoglobin but not hemoglobin oxide and makes it the most appropriate choice.

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The population density of the 900 sheep in the given plot of land is 150 sheep per square kilometer.

The population density of 900 sheep in a plot of land that is 3.00 km by 2.00 km can be calculated by dividing the total number of sheep by the area of the land.

First, we need to calculate the area of the land. The area can be found by multiplying the length and width of the plot of land:

Area = length × width = 3.00 km × 2.00 km = 6.00 km²

Next, we divide the total number of sheep by the area to calculate the population density:

Population Density = Total number of sheep / Area = 900 sheep / 6.00 km²

Performing the calculation, we find:

Population Density = 150 sheep/km²

Therefore, the population density of the 900 sheep in the given plot of land is 150 sheep per square kilometer.

Population density is a measure of the number of individuals (in this case, sheep) per unit area. By dividing the total number of sheep by the area of the land, we obtain the population density in terms of sheep per square kilometer. In this case, the population density is 150 sheep/km², indicating that there are, on average, 150 sheep within each square kilometer of the land.

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Answer: yes atom is the smallest level of organization

Explanation:

Diffusion may be defined as the process of movement of individual molecules of a substance from an area of higher concentration to an area of lower concentration through a semi-permeable membrane.

During the process of diffusion, the net movement of molecules is carried out from an area of greater concentration to an area of lesser concentration. After the termination of this process, dissolved molecules become uniformly distributed.

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Answer:

The purpose of natural selection is not a conscious or intentional one, as it is not driven by a specific goal or purpose. Instead, natural selection is a fundamental process in biology that acts on heritable traits within populations over generations. It is a key mechanism of evolution.

Explanation:

The primary outcome of natural selection is the adaptation of organisms to their environment. Individuals with traits that are advantageous in a particular environment are more likely to survive, reproduce, and pass on those beneficial traits to their offspring. Conversely, individuals with traits that are disadvantageous are less likely to survive and reproduce, leading to a reduction in the frequency of those traits in the population over time.

Natural selection, therefore, acts as a filter that shapes the characteristics of populations, favoring traits that enhance an organism's survival and reproductive success in a given environment. Over many generations, this process can lead to the development of new species or the modification of existing ones, as populations accumulate adaptations that allow them to thrive in different ecological niches.

It's important to note that natural selection does not have an end goal in mind, nor does it necessarily lead to the "best" or most advanced organisms. Instead, it is a consequence of the interactions between organisms and their environment, constantly shaping and refining the traits of living beings based on their ability to survive and reproduce.

Answer:

Explanation:

The following sketch of meiosis has a diploid chromosome number of 4, meaning that there are 2 sets of chromosomes but 4 individual chromosomes all together. This cannot be done with 3 chromosomes because it would not longer be a diploid chromosome instead it would be a triploid chromosome. Therefore, I have only attached the diploid chromosome sketch.

Answer:

a.

Explanation:

The carbon cycle involves only plants. The nitrogen cycle requires a process called fixation, which makes the nitrogen more usable for living organisms. The carbon cycle requires that temperatures be above 27 °C (80 °F).

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The statement that best describes a difference between the nitrogen and carbon cycles is the nitrogen cycle requires a process called nitrogen fixation that is carried out by certain bacteria.

The main difference between nitrogen cycle and carbon cycle is that nitrogen cycle describes the conversion of nitrogen into multiple chemical forms and its movement between the different ecosystems. Whereas the carbon cycle describes the movement of carbon and its multiple chemical forms between the atmosphere, lithosphere and hydrosphere.

Microbes are involved in the nitrogen cycle process. Both plants and animals participate in the carbon cycle.

Thus, the statement that best describes a difference between the nitrogen and carbon cycles is option (b).

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A chromosomal deletion that affects a blood cell, deactivating a crucial gene involved in development would be passed onto a living fertile offspring if it happened in a parent.

The mutation below that would be passed onto a living fertile offspring if it happened in a parent is the chromosomal deletion that affects a blood cell, deactivating a crucial gene involved in development.

Chromosomal deletions involve the loss of a segment of DNA from a chromosome. If this deletion occurs in a germ cell (such as an egg or sperm cell) that is involved in reproduction, it can be passed on to offspring. In this case, if the deletion affects a crucial gene involved in development, it can have significant implications for the offspring's health and development.

The other mutations described do not necessarily have a direct impact on the genetic material that is passed on to offspring. An insertion mutation in an egg cell that deactivates a gene for hair color, a silent mutation in the genes of pancreas cells coding for insulin, or DNA substitution errors that occur in somatic cells resulting in skin cancer is not typically inherited by offspring, as they do not occur in the germ cells responsible for reproduction.

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Answer:

Media used for cell growth contain proteases and a divalent cation chelator to help cells adhere to the surface.

Explanation:

Mammalian cell structure is the process where animals cells are grow in vitro in a flask or dish. The methods, equipments, reagents and supplies use in this type of culture prevent contamination and maintain cell culture purity. Protein enzymes like Serine protease breaks the cellular matrics interaction between the cells. In cell culture, the focal adhesions that are anchoring the cell to the culture dish is cut away. Most trypsin solutions for cell culture also contain EDTA which acts as a chelator for calcium. When calcium is remove from a solution, cadehrin that hold cells to each other break down and cells become separated from each other.

Answer:

1. The mitochondria are responsible for producing energy in the form of ATP through cellular respiration.

2. Prokaryotic cells are smaller and do not have a nucleus or membrane-bound organelles, while eukaryotic cells are larger and have a nucleus and membrane-bound organelles.

3. Ribosomes are responsible for synthesizing proteins in the cell.

4. The endoplasmic reticulum is responsible for protein and lipid synthesis and transport within the cell.

5. Plant cells have cell walls, chloroplasts, and larger vacuoles, while animal cells do not have cell walls, chloroplasts, or large vacuoles.

6. The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for transport within the cell or for secretion outside the cell.

7. Lysosomes are responsible for breaking down and digesting waste materials and cellular debris within the cell.

8. The cytoskeleton is responsible for maintaining cell shape, providing support and structure, and facilitating cell movement and division.

9. Passive transport does not require energy and involves the movement of molecules from an area of high concentration to an area of low concentration, while active transport requires energy and involves the movement of molecules from an area of low concentration to an area of high concentration.

10. Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of high water concentration to an area of low water concentration.

I hope these answers are helpful! Let me know if you have any more questions.

Answer:

1. The function of mitochondria in a cell is to produce energy in the form of ATP through cellular respiration. Mitochondria are also involved in other cellular processes such as apoptosis (programmed cell death), calcium signaling, and lipid metabolism.

2. Prokaryotic cells are smaller and simpler in structure than eukaryotic cells. Prokaryotic cells lack a nucleus and other membrane-bound organelles, while eukaryotic cells have a nucleus and various membrane-bound organelles.

3. Ribosomes are responsible for protein synthesis in a cell. They read the genetic code stored in messenger RNA (mRNA) and use it as a template to link amino acids together in the correct order to form a protein chain.

4. The endoplasmic reticulum (ER) is involved in protein synthesis, folding, and modification. It is also involved in lipid synthesis, calcium storage, and detoxification of drugs and toxins.

5. Plant cells have a cell wall, chloroplasts, and a large central vacuole, while animal cells lack these structures. Additionally, plant cells are typically larger than animal cells.

6. The Golgi apparatus is responsible for modifying, sorting, and packaging proteins and lipids for transport to their final destinations. It consists of a series of flattened sacs called cisternae.

7. Lysosomes are involved in the breakdown of cellular waste and debris, as well as the degradation of damaged or unneeded cellular components. They contain enzymes that can break down various biomolecules such as proteins, lipids, and nucleic acids.

8. The cytoskeleton is a network of protein fibers that provides structural support to the cell, helps maintain cell shape, and enables cell movement and division. It is made up of three main types of fibers: microfilaments, intermediate filaments, and microtubules.

9. Passive transport is the movement of molecules across a cell membrane without the input of energy, while active transport requires the input of energy to move molecules against their concentration gradient. Passive transport includes diffusion, osmosis, and facilitated diffusion, while active transport includes primary and secondary active transport.

10. Osmosis is the diffusion of water across a selectively permeable membrane from an area of high water concentration (low solute concentration) to an area of low water concentration (high solute concentration). It is a type of passive transport and is important for maintaining the water balance in cells.

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Answer:

A light year is the distance which is equal to 9,460,730,472,580.8 km, so:  

= 4.91957985 X \(10^{15}\)km  

which is distance travels by the light.  Now what time it takes light to travel distance we found.  

A year has 365.25 days, so,

\(1 (\frac{365.25)}{1 year}) (\frac{24}{1 day}) (\frac{3600 s}{1 hr} )\) = 31557600 seg/year

The light speed in the space is equal to 299,792.458 km/s, so:  

4.91957985 x \(10^{15} (\frac{1 seg}{29792.458}) \frac{1 year}{31557600}\) = 520 years

if today, August, 2020, then

2020 - 520 = 1500

Spanish and Portuguese spread out over the southern part of the Western Hemisphere and bring in America brought to Spanish colony of Santo Domingo in year 1500.

\(t=2019-520\\ t=1499 AD\)

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Answer:

Conditions:

**image also provided below for further clarification - all rights reserved to Mastering Genetics**

Explanation:

Conditions:

Because the replicated DNA is created, and the cell has twice as much genetic material, cells in the G2 phase have twice as much DNA.

A diploid cell's G1 phase marks the start of the cell cycle (DNA content = 2 N; N is the number of chromosomes).

The cell enters the G2 phase with twice as much DNA (4 N) as the starting cell after DNA replication is finished in the S phase.

DNA replication happens in the S phase, when DNA synthesis happens and the amount of DNA doubles. Once the G1 phase is over, each chromosome contains one chromatid.

Each chromosome will have two chromatids following the S phase, though. The two chromatids here are exact duplicates of one another.

Therefore, When a cell is in the G1 phase, it physically expands and produces more protein and organelles.

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Typical meats include beef, chicken, turkey, and pork. Even though pigs are omnivores, all of these animals are mostly herbivorous.Animals find food along a single path, creating a feeding chain.

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Butterflies eat flowers on plant ,plants eaten by goat and goat is eaten by human beings as meat.

The apex of the food chain includes carnivores like polar bears and orca whales, which are not themselves preyed upon. According to recent research, we actually fall between between pigs and anchovies. With polar bears and orca whales at the top of the food chain, that places humans directly in the middle of the chain.

To create a food web, write out the primary producers, herbivores, omnivores, and carnivores for the chosen habitat. Connect them with arrows showing both predator and prey. The final product may look like an actual web or map. So here in this primary producer is plant primary consumer is goat and secondary consumer is human being.

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Answer and Explanation:

1. Each of the elements shown are transmitted to the fetus during pregnancy through the mother's bloodstream and through the umbilical cord, where the fetus receives all the support for its body, such as oxygen, nutrients, hormones, treatments, tests, among others. others. Some of them are possible through the visualization of the fetus and the manipulation of the products written by him.

2. Syphilis is a sexually transmitted infection caused by the bacteria Treponema pallidum. This infection has three phases (primary, secondary and tertiary) that are interspersed with asymptomatic periods, which aggravates the severity of the disease, since it presents itself as a silent evil. The primary phase occurs between 3-4 days after infection and its main symptom is the presence of wounds throughout the body, especially in the genitals. If not treated properly, 8 weeks later the secondary phase appears, where the infected person has red spots on the body, itching, fever, muscle pain and swollen and painful lymph nodes in the neck and armpit. When left untreated, the disease progresses to the tertiary stage where it presents severe symptoms that are difficult to diagnose. The disease affects the brain, eyes, heart, joints and the nervous system, causing severe headaches and even epilepsy.

3. It is necessary for both partners to be treated in case of any sexually transmitted infections. This must be done, primarily because the transmission occurred between these partners, which indicates that both have the disease and can reinfect themselves, or infect other people.

4. People aged 15 to 24 are at the greatest risk of being infected with a sexually transmitted infection. This is because people at this age are more likely to not get a steady partner and to adopt behaviors that facilitate infection such as having sexual contact without adequate protection.

5. What causes cervical cancer is the untreated infection of a virus called HPV. This type of cancer is usually asymptomatic, but in the early stages it may show bleeding from the genitals after sexual intercourse.

Answer:

I would go with A maybe,am not really sure though.

Answer:

Gravity perception is important to plants because they need to send their roots downwards towards water and nutrients and their shoots upwards towards light. Plants are known to detect gravity using statelets, which are small starch-filled packets that settle at the bottom of gravity-sensing cells

Explanation:

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Answer and Explanation: You will find the graph in the attached file

When changing the numbers in the vertical axis of the original graph, you will see that bars tend to get shorter than they originally were. This occurs because new numbers are much bigger than the original numbers, the proportion of the bars changes because they must represent the same information in a much bigger space. Offenlly, this is a tool very used by media to mark a tendency when informing something. So It is very important whenever looking at any graph to see what the axes are telling you because by the size of the bars you might infer something that might be different from what is really going on.