Oxygen is the final electron acceptor for cellular respiration. What is the final electron acceptor in the light reactions of photosynthesis?

A skin cell in G2 of interphase has twice as much DNA as it had in G1.

A skin cell is somatic cell that undergoes mitosis (cell division). Mitosis together with interphase is part of the cell cycle.

Interphase also known as a phase for the preparation for division consists of three phases:

• G1- cell becomes larger, copies organelles, and makes the building blocks necessary for the new cell

• S-cell copies its DNA in the nucleus (that is why G2 phase has twice as much DNA as it had in G1)

• G2 – cell continues to grow, makes proteins and organelles.  

During the mitosis, the cell separates its DNA into two and divides its cytoplasm, forming two new daughter cells.

"The correct answer is that a skin cell in G2 of interphase has twice as much DNA as it had in G1.

The cell cycle is a series of events that cells go through as they grow and divide. Interphase is the phase of the cell cycle during which the cell grows, performs its normal functions, and prepares for cell division. Interphase is divided into three stages: G1 (first gap), S (synthesis), and G2 (second gap).

During the G1 stage, the cell grows in size and synthesizes various enzymes that are required for DNA replication. The amount of DNA in a cell during G1 is 2C, where C represents the amount of DNA in a haploid cell (the amount of DNA in one set of chromosomes).

In the S phase, DNA replication occurs, and the amount of DNA in the cell doubles. Each chromosome is replicated to form two identical sister chromatids, and the cell now contains 4C amount of DNA.

By the time the cell enters the G2 phase, it has completed DNA replication, and the amount of DNA remains at 4C. Therefore, a skin cell in G2 has twice as much DNA as it had in G1, because it has replicated its DNA during the S phase.

To summarize:

- In G1, the cell has 2C DNA.

- In S, the cell replicates its DNA, resulting in 4C DNA.

- In G2, the cell has completed DNA replication and still has 4C DNA.

Thus, a skin cell in G2 of interphase has twice the amount of DNA as it had in G1."

Option b.

The type of sketch that you are likely creating upon arriving at a crime scene is a Rough sketch.

A rough sketch is a preliminary drawing that provides an overview of the crime scene, including the location of evidence, the layout of the area, and any other relevant details. It is a quick and approximate representation of the scene and helps in documenting the initial observations.

In addition to the rough sketch, you may also create other types of sketches, such as detailed sketches, scaled sketches, or final sketches, depending on the specific requirements of the investigation.

https://brainly.com/question/30392005

#SPJ12

by the lowering of activation energy if not i'm sorry

Answer:

depend on body movement to help move blood along

thin-walled

contain valves to prevent backflow

Explanation:

Veins return deoxygenated blood to the heart. They are thinly walled to allow blood plasma to flow back from tissues. This is after capillaries have brought in oxygenated and nourished blood into interstitial spaces from which exchanges with tissue occurs. The movement of this blood in the veins is assisted by musculoskeletal movements while the vein valves prevent backflow because the blood does not have as much pressure as in the arteries.

A. Carbohydrate

reason is because it is due to liquid

a population with a LOT of genetic variation

Answer:

Colder and Heavier

Explanation:

Air pressure is the ratio of force exerted by air per unit area ,measure in  pascal , Newton per square meter, torricelli, atmosphere etc

High air pressure means that the air is (blank A.) and (blank B.).

Choices for (blank A).

1.lighter

2.higher

3.nearer

4.colder

Choices for (blank B.)

1.further

2.warmer

3.lighter

4.heavier

BLank A colder

blank B is heavier.

This is so because high air pressure is a colder air from the Earth's atmosphere down to the surface of the earth. It is denser than air that's why it is heavy. Because it is denser than normal air. it moves from the bottom layer of the atmosphere.

High air pressure means that the air is denser and heavier. It's important in weather forecasting as high pressure areas often mean clearer weather, while low pressure could indicate unsettled conditions.

High air pressure indicates that the air is denser and heavier. Atmospheric pressure refers to the force exerted by the weight of the air in the atmosphere. In regions of high pressure, the air is denser because more air molecules are compressed into a certain space, compared to regions of low pressure. This denseness makes the air heavier. This principle is crucial for understanding weather forecasting, as areas of high pressure often correspond with clearer, sunnier weather, whereas low pressure areas could indicate stormy or unsettled weather conditions.

https://brainly.com/question/34803534

#SPJ6

A bird with mutation that made its beak stronger so that it can now crack many different types of nuts.

It is C. Advantageous mutation as it provides an advantage.

Cells that are produced by meiosis are best described as  C. Gametes;haploid as they only have half the number of chromosomes.

A cell from the same organism have the same D. DNA.

By definition, C. Crossing over only occurs in meiosis that does not happen in mitosis.

Answer:

The correct option is D.

Explanation:

There are different types of proteins in cells, one of these is integral proteins. Integral protein perform diverse functions in the cells such as transporters, linkers, ion channels, receptors, etc. Trans-membrane proteins are integral proteins, they are a kind of proteins that  are permanently attache to the membranes of the cells and they span the entirety of the cells they are attached to.

The properties of trans membrane protein include the following:

1. They typically have one or more alpha helices spanning the membrane layer.

2. They have both hydrophobic and hydrophilic regions.

3. Each of the proteins have 3 distinct domains, which are intracellular, extracelllular and inside the lipid bilayrs.

Meiosis starts with a single diploid cell and produces C) four haploid cells.

Meiosis starts with a single diploid cell, which contains two sets of chromosomes, and produces C) four haploid cells, each containing one set of chromosomes.

https://brainly.com/question/32192580

#SPJ11

The correct answer is option (C).  Meiosis starts with a single diploid cell and produces four haploid cells.

Meiosis is a type of cell division that reduces the chromosome number by half, resulting in four haploid cells.

This process is essential for sexual reproduction in eukaryotic organisms, as it produces gametes (sperm and egg cells) that contain a single set of chromosomes.

Here is the step-by-step explanation of meiosis:

1. Meiosis begins with a single diploid cell (2n), which contains two sets of chromosomes, one from each parent.

2. The cell undergoes DNA replication, so that each chromosome consists of two identical sister chromatids.

3. The cell then enters meiosis I, which is divided into several stages:

4. Meiosis II follows, which is similar to mitosis and involves the separation of sister chromatids:

Dependant variable as it is what is measured

In an experiment, the observed results that change due to variation in the independent variable are known as dependent variables. The dependent variable depends on the independent variable which is manipulated.

The observed results of an experiment that occur from changes in the independent variable are known as Dependent Variables. In any scientific experiment, the independent variable is the factor that the researcher controls and manipulates, while the dependent variable is the observed result that changes due to the changes in the independent variable. For example, if one is testing different amounts of fertilizer (independent variable) on plant growth (dependent variable), the growth of the plant is the dependent variable because it depends on the amount of fertilizer used.

https://brainly.com/question/1479694

#SPJ11

The predator gets the energy it needs to survive.

Answer:Option C  

Explanation: The predators are the animal (carnivores) that feed on the other smaller animals for their energy need. The animals they feed on provide energy for their survival.

The predators are generally carnivore animals that eat animals as their soul source of energy to perform the vital functions such as running, walking, eating and metabolism inside the body.

So, predation helps to gain energy from the prey for survival.

are you ok? like seriously is your home life ok i dont want you to be going through anything you shouldnt.

Are you ok? Do you need someone to talk to? People reach out to anyone for help if this is serious.

Answer:

C.  providing protection for the internal organs

Explanation:

The muscular system is made up of the muscles of the body. The main function the muscular system is that it aids movement. Muscles attached to bones and to one another helps the body during locomotion.

The muscular system also serve to protect the internal organs from damage. Some of the abdominal muscles where there are no bones protects the organs located in that part of the body.

Answer:

A. communication

Explanation:

Muscular system give us The muscles we need for speaking and writing are also skeletal muscles.

The adrenal glands sit on top of the kidneys and release adrenaline, which affects heart rate.

C.) heterotrophic, according to SoCratic

The Musculoskeletal System Provides Form, Support, Stability, And Movement For The Body. It Is Made Up Of The Bones Of The Skeleton, Muscles, Cartilage, Tendons, Ligaments, Joints, And Other Connective Tissues And Organs. The Bones Are Moved By Muscle Contractions.

Clay

Answer:

The correct answer is clay.

Explanation:

Clay is the soil particle that exhibits the greatest oxygen holding capacity. It is a fine-grained soil or natural rock substance, which combines one or more minerals of clay with the traces of organic matter and metal oxides. The maximum concentration of water, which a given soil can hold is known as its field capacity, and the clay refers to the soil that exhibits the greatest water holding tendency.

t birth, gordy was found to have a severe thyroid deficiency and was put on thyroid hormone replacement to prevent an intellectual disability resulting from the condition known as

Hypothroidism

Answer:

The correct answer is cretinism.

Explanation:

Cretinism also knew as congenital hypothyroidism refers to an extreme thyroid hormone deficiency in newborns. It leads to stunted growth, impaired neurological function, and physical deformities. The condition may take place because of an issue with the infant's thyroid gland, or due to the lack of iodine in the body of a mother at the time of pregnancy.

I think the answer is b

Answer: Cell spends

Explanation:

The correct answer is: B) stabilizing selection

Stabilizing selection is a type of natural selection in which the population mean (non-extreme trait value) is favored over extreme values. It favors the intermediate variants such as heterozygous phenotype (more than both homozygous). This is the most common type of selection, because most traits change little over time (not by favoring extreme traits).

Heterozygote advantage, a circumstance where heterozygous individuals have a higher fitness level than homozygous individuals, is most closely linked to stabilizing selection. This selection favors average phenotypes and works against extreme variations, thus reducing genetic diversity. Hence the correct answer is option B)stabilizing selection

The term Heterozygote Advantage refers to a circumstance in which heterozygous individuals (with two different alleles for a particular gene) have a higher fitness level than homozygous individuals (with two identical alleles). It's most closely linked to stabilizing selection (option B).

Stabilizing selection is a selective force that favors average phenotypes and works against extreme variations. In other words, it tends to reduce genetic diversity over time, which is why it is often associated with heterozygote advantage.

For example, with sickle cell anemia, individuals who are heterozygous for the sickle cell trait are less prone to malaria, giving them a higher survival rate in areas where the disease is prevalent. This is an example of heterozygote advantage and stabilizing selection at work.

https://brainly.com/question/12370593

#SPJ3

interphase,prophase,metaphase,anaphase,telophase

Answer: anthropogenic

Explanation:

The effect of human activity on the environment is called as anthropogenic.

Anthropogenic impacts can be on the ecosystems, biodiversity, and on natural resources. The human activities such as forests fires, deforestation, pollution are anthropogenic activities.

Transport nutrients and water from below-ground tissues to above-ground tissues and grow taller.

The presence of vascular tissue allowed plants to transport nutrients and water from below-ground tissues to above-ground tissues and grow taller. This adaptation enabled plants to grow larger and survive in diverse terrestrial environments by distributing essential resources throughout their bodies.

Vascular tissues, including xylem and phloem, form a plant's "plumbing system." They carry water and minerals from the soil to the leaves for photosynthesis and transport food produced by photosynthetic cells to other cells for growth and storage.

These adaptations enable plants to distribute essential resources throughout their bodies, resulting in the ability to grow larger and survive in varied, often harsh, terrestrial environments.

Initially, early land plants were limited in height and primarily competed for light close to the ground. The evolution of vascular tissues allowed them to develop taller structures, enabling better access to sunlight and promoting further growth and diversification.

Additionally, rigid molecules like lignin within the vascular tissues provided necessary structural support for these larger forms. Vascular tissues also provided structural support through molecules like lignin.

The answer is false!

Answer: The answer is TRUE

Explanation:

The correct answer is - under water.

During the Mississippian Period, the climate on the Earth, as well as the shape of the continents and the oceans was not as it is nowadays, in fact it was much different, unrecognizable by their shapes in the present.

Pennsylvania was not part of the land in this period, but instead it was part of the ocean, thus it was under water. Since it was close to the coastline, it was very rich in life, organisms of all types lived in it. One of those organisms that thrived were the sea lilies. They had perfect conditions, so they were one of the most common organisms in this area in the Mississippian Period, thus there's lot of fossil remains from them from this geological period.

Pennsylvania was covered by a shallow sea during the Mississippian Period, which provided favorable conditions for crinoid growth. Crinoids are not plants but echinoderm species that appeared like sea plants. They use holdfasts to anchor themselves to the sea floor.

Crinoids, also known as sea lilies, appear to be sea plants but are not plants at all. Crinoids are an echinoderm species which uses anchoring structures called holdfasts to attach themselves to the sea floor. Crinoids were most abundant in Pennsylvania during the Mississippian Period, which ranged from 375 to 320 million years ago. Fossils of the crinoids show that during most of this time Pennsylvania was covered by a shallow sea that provided favorable conditions for crinoid growth.

Cutaneous receptors are:

• Pacinian corpuscles-These are types of mechanoreceptor (response to mechanical  stimuli such as pressure or vibration). They are nerve endings in the skin that are sensitive to vibration and pressure

• Merkel's disc-These are types of mechanoreceptors, nerve endings that are sensitive to mechanical pressure, position, and sustained touch (shapes and edges of objects).

• Ruffini's end organ- These are types of mechanoreceptors slowly adapted that detects skin stretch.

• Meissner's corpuscles- These are types of mechanoreceptors, nerve endings responsible for sensitivity to light touch (changes in texture).

Four main types of cutaneous sensory receptors are free nerve endings, Merkel's disks Ruffini endings and Pacinian corpuscles. They respond to stimuli like pain, temperature, light touch, skin stretch joint activities and vibration respectively.

The skin has a variety of specialized sensory receptors, each responding to specific types of stimuli. Four main types of these sensory receptors are: 1. Free nerve endings which are most common and sensitive to painful stimuli, hot and cold temperatures, and light touch. 2. Merkel's disks, found mainly in fingertips and lips, they respond to light touch. 3. Ruffini endings which detect skin stretch joint activity and warmth. 4. Pacinian corpuscles that detect transient pressure and high-frequency vibrations.

These touch-related stimuli receptors play a crucial role in our sense of touch, allowing us to interact with and understand our environment. For example if an insect crawls on your skin, the movement of hair follicles triggers the free nerve endings, alerting you of the presence of the insect.

https://brainly.com/question/33447539

#SPJ3

respitory systym and circulatory system because you need your lungs to breathe and the blood and heart to pump the oxygen into the blood. :))

The two organ systems that work together to provide oxygen to cells throughout the body are the respiratory organ system and the circulatory organ system and both systems work together and circulate blood all over the body.

Both these respiratory and circulatory systems have high importance in the body, as the respiratory system is responsible for exchanging gases between the body and its surroundings, while the circulatory system is responsible for transporting oxygen, nutrients, and other substances throughout the body, and by doing so, they maintain body homeostasis.

Hence, the two organ systems that work together to provide oxygen to cells throughout the body are the respiratory organ system and the circulatory organ system and both systems work together and circulate blood all over the body.

Learn more about the respiratory and circulatory systems here.

https://brainly.com/question/3305440

#SPJ5

The correct answer is choice D.

Oxygen first enters the bloodstream in the lung capillaries. The oxygen rich blood then returns to the heart.

Answer:

The correct answer is option D. 5 (lung capillaries).

Explanation:

The oxygen first enters in lung capillaries into the bloodstream from the alveoli by the simple diffusion. There is a network of tiny vessels known as capillaries from the alveoli sacs of lungs.

Lung capillaries transport the oxygenated blood to the heart and from there it pumps to the different parts of the body where blood carries the carbon dioxide in veins to the heart.

Thus, the correct answer is option D. 5. (lung capillaries).

interstitial fluid - hope this helps!!

During pneumonia, the lungs become "waterlogged," which means that within the alveoli there is an abnormal accumulation of fluid and the lungs become "waterlogged" due to this abnormal accumulation.

In pneumonia, the accumulation of fluid in the alveoli is referred to as "alveolar edema," and this can be caused by a variety of factors, including infection with bacteria or viruses, injury to the lungs, etc., and fluid has accumulated within the alveoli, making it difficult for gas exchange to occur, which causes respiratory distress.

Hence, during pneumonia, the lungs become "waterlogged," which means that within the alveoli there is an abnormal accumulation of fluid and the lungs become "waterlogged" due to this abnormal accumulation.

Learn more about pneumonia in lungs here.

https://brainly.com/question/29619987

#SPJ6