Explain how fertilization restores the diploid number and how meiosis maintains the diploid number across generations.

Answer:

lymphatic

Explanation:

hope i am right about this

Answer:lyric

Explanation: I got it right

Answer:

3a) The number of neutrons

b) protons and neutrons

Explanation:

Isotopes of the same element have the same number of protons but different number of neutrons

alpha particles consist of two protons and two neutrons

The factor that is an endogenous factor is: d. Decision as to which herbicide would be best given the farm's IPM (Integrated Pest Management) strategy.

An endogenous factor refers to a factor that originates from within the system or process being studied. In the given options, the endogenous factor is d. Decision as to which herbicide would be best given the farm's IPM (Integrated Pest Management) strategy.

This factor is influenced by internal considerations and decisions made within the system itself. On the other hand, options a, b, and c are exogenous factors because they are external to the system and can affect the system but are not directly determined by it.

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effect of genetic drift on a gene pool?

A: Loss of alleles

B: increase in numbers of alleles

C: No Change in number of alleles

Answer:b

Explanation:

b

Answer:

it’s b

Explanation:

it’s just b

Answer:

A. Macromolecule

Explanation:

A macromolecule is commonly formed through polymerization which means the production of polymers. The polymers are usually formed when different monomers add up to form a bigger substance(polymer). Polymers are examples of macromolecules because they contain two or more monomers which has a lot of compounds embedded in them.

Macromolecules are very large molecule made up of many smaller molecules joined together and the other options such as carbohydrates, Lipid and nucleic are examples of macromolecules formed under suitable conditions.

The alteration of pseudomonas bacteria's DNA to enable them to consume oil could have both positive and negative impacts on the environment and society.

Firstly, the potential benefits include the ability to mitigate oil spills and minimize damage to marine flora and fauna. These genetically modified bacteria could be used in oil spill cleanup efforts, helping to break down and digest the spilled oil more effectively, thus reducing the environmental impact.

On the other hand, there are also potential risks associated with this biotechnology. If the modified bacteria were released into the environment unintentionally or without proper control, there could be adverse consequences. The uncontrolled spread of these bacteria could result in unintended pollution as they consume not only spilled oil but also other hydrocarbon sources, leading to the release of toxic gases and further environmental damage.

Moreover, the introduction of such bacteria could disrupt natural ecosystems, potentially affecting other microorganisms and organisms that depend on oil for survival. The long-term effects on the balance of ecosystems are uncertain and would require thorough evaluation before any large-scale implementation.

In terms of society, the development of these bacteria could have economic implications. The cleanup of oil spills could become more efficient and cost-effective, potentially reducing the financial burden on affected industries and governments. However, it is important to consider the potential risks and unintended consequences of relying solely on this biotechnology, as it may discourage the development of alternative, cleaner energy sources.

Overall, the impact of genetically modified pseudomonas bacteria with oil-consuming abilities on the environment and society would depend on how the technology is deployed, regulated, and monitored. It is crucial to carefully evaluate the potential risks and benefits to ensure responsible and sustainable implementation.

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Microtubules capture chromosomes by binding specifically to kinetochores on the sister chromatids cohesins are proteins that hold sister chromatids together until they are ready to be separated during cell division.

During cell division, microtubules form the mitotic spindle, responsible for segregating the duplicated chromosomes to opposite poles of the cell. The kinetochore is a protein structure located at the centromere of each sister chromatid. It serves as the attachment site for microtubules. Microtubules from the spindle fibers attach to the kinetochores, forming kinetochore microtubules. These microtubules exert tension on the kinetochores, allowing for proper alignment and movement of the chromosomes during both mitosis and meiosis. Telomeres are protective structures found at the ends of chromosomes, and condensins are proteins that help condense and package the DNA into a compact form.

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9514 1404 393

Answer:

Explanation:

Given:

  runner is launched at 30° angle to horizontal at 11 m/s

  acceleration due to gravity is g = -9.8 m/s²

Find:

  runner's hang time

  runner's distance to the landing point

  runner's maximum height

Solution:

The (horizontal, vertical) speed components will be ...

  (11 m/s)(cos(30°), sin(30°)) = (5.5√3 m/s, 5.5 m/s)

The time of flight can be found from the height formula:

  h(t) = 1/2gt² +vt . . . . . . where v is the vertical speed at launch

The time we're concerned with is the time when h(t)=0 and t>0.

  0 = -4.9t^2 +5.5√3t = t(-4.9t +5.5√3)

The second factor is zero when ...

  t = (5.5√3)/4.9 ≈ 1.122 . . . seconds hang time

__

The distance to the landing point will be the product of horizontal speed and hang time:

  d = (5.5 m/s)(5.5√3/4.9 s) ≈ 10.693 m . . . . distance to landing

__

The maximum height can be found from the formula (based on conversion of kinetic energy to potential energy) ...

  h = v²/|2g| = (5.5 m/s)²/(2(9.8 m/s²)) ≈ 1.543 m . . . . maximum height

Answer:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct. Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Plants help humans survive by giving out carbon dioxide to oxygen through this proccess that helps us to breathe.

Answer: photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct. Photosynthesis is important to living organisms because it is the number one source of oxygen in the atmosphere. Plants help humans survive by giving out carbon dioxide to oxygen through this proccess that helps us to breathe.

Explanation:

she said it and stop deleting

Answer:

B

Explanation:

Answer:

The answer would be B.

Explanation:

This is because absolute dating methods determine how much time has passed since rocks formed by measuring the radioactive decay of isotopes or the effects of radiation on the crystal structure of minerals.

The transport of phloem sap is considered an active process beacuase  energy is used to transport sucrose into companion cells near sources, against a concentration gradient.

Phloem juice is a complex mixture of organic and inorganic substances. Previous studies have shown that sugars and amino acids are major metabolites in phloem fluid. Saccharosis is the major sugar in the phloem juice and its concentration varies between species.

Phloem transport is said to be active because both phloem loading at the source and unloading at the sink occur through the active transport. It is a biological process in which molecules move against a concentration gradient and require chemical energy to transport biochemicals from low to high concentrations.

Phloem juice contains a large amount of sugars, amino acids, vitamins, organic and inorganic acids. The main components of phloem sap are sugars and amino acids. Sucrose is the major sugar in phloem sap.

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Skeletal muscle has extremely few blood arteries because the cells are so closely spaced. Movement may be controlled voluntarily thanks to neural connections between skeletal muscles and the neurological system.

Blood vessels and nerves are widely distributed in skeletal muscles. This has a direct bearing on the contraction of skeletal muscle, which is its main activity. Skeletal muscle fibres must first receive an impulse from a nerve cell in order to contract.

They operate in oppositional pairs. The muscles that pull on bones to create body motions are known as skeletal muscles.

The brain and skeletal muscles transmit a variety of impulses and signals that your bones and muscles respond to. The neurological system then commands the bones to move.

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The proportion of dominating people in the following population is (1+4)%, or 5%.

The Hardy-Weinberg rule states that in the absence of evolutionary driving forces, allele and genotype frequencies in a population remain constant.

It claims that the binomial expansion of the square of the sum of p and q can be used to describe the total genotype frequencies.

The following sum equals one: (p+q) ²= p²+ 2pq + q².

In this instance, "p" represents the frequency of the dominant allele, and "q," that of the recessive allele. The expression "2pq" represents the population's frequency of heterozygotes.

The frequency of the dominant allele is given by p+q=1, while the frequency of the recessive allele is given by q = 0.9 for a certain hereditary trait. Consequently,

p=1-q

P=1-0.9 = 0.1

p²= (0.1) =0.01 or 1% of the population has a homozygous dominant genotype.

The percentage of heterozygous dominant genotypes in the population as a whole is 4% (PQ)² = 2 X 0.1 X 0.2 ".

∴ (1+4)%

=5%.

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These descriptions of genetic expression are known as their phenotypes.

Phenotypes refer to the observable physical characteristics of an organism, such as height, hair color, and eye color, which are determined by both genetic and environmental factors.

Genotypes, on the other hand, refer to the genetic makeup of an organism, while pheromones are chemical signals produced by an organism, and latent maps are not related to genetic expression.

In summary, the physical descriptions of Brendan and Connor, including their height, hair color, and eye color, as well as their friendly and outgoing personalities, are examples of their phenotypes.

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Answer:

22+xx

Explanation:

xxxxxxxxxxxxxxxxx

An Adding sand on top of the leaves to model burial in sediments.  

Explanation:

I know because I'm different breed

As a first aider, in the event of an emergency, the first step would be to call 911 or the local emergency number immediately. After that, one must attend to the victim, which in this case is the six-month-old infant who has turned blue around the mouth. More than 100 words have been used to explain the following steps that should be taken if an infant is choking.

Call for Help The first step in responding to any medical emergency is to alert someone who can help. Dial 911 or your local emergency number if you're alone. For medical emergencies involving a baby or infant, it's always best to call 911 first, then begin providing medical aid.

Follow the Basic Steps of First Aid The following are the basic first-aid steps to follow when responding to a choking infant or baby: Position your infant or baby face down on your arm with their head lower than their body. Be sure to support their head and neck with your hand. Using the heel of your other hand, deliver up to five forceful back slaps between their shoulder blades.

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Answer:

There are many benefits of eating broccoli. These are some benefits: Packed With Vitamins, Minerals and Bioactive Compounds, Contains Potent Antioxidants That Offer Health-Protective Effects, Bioactive Compounds May Contribute to Reduced Inflammation, May Protect Against Certain Types of Cancer, Antioxidants and Fiber May Aid Blood Sugar Control, and May Support Heart Health in a Variety of Ways.

Answer:

B

Explanation:

This is because these parents solely have no hair on the back of their hands, and don't have the trait to possibly give their child hair on the child's hands.

Answer:

Beryllium is the element with the atomic number 4.

The best describe about the design for this experiment is random block design.

An experimental design known as a randomized block design divides the experimental units into units known as blocks. The experimental units inside each block are assigned the treatments at random.

We have a fully randomized block design when each block has at least one instance of each treatment.Each variety has 30 plants in total. This indicates that they are separated into a number of groupings that we will refer to as blocks.

Every plant in every block has the same type and quantity of soil in its pots, as well as the same amount of water and light exposure. This indicates that a treatment condition is given to each plant in each block.

The process is repeated by giving each plant in the teaching block a different treatment one at a time, which will lessen variability. The aforementioned claims make it quite evident that this is a randomized block design, which is when the experimenter or researcher splits individuals into smaller groups known as blocks.

In a manner that the variability within the blocks is less than the variability between the blocks. Thereafter, the participants within each block will now be randomly assigned to treatment conditions.

Hence, The best describe about the design for this experiment is random block design.

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Full Question : A biology student wants to determine if using a fertilizer would help promote growth of new babies in spider plants. The student has access to 90 spider plants of three varieties: green, variegated, and curly. They all are potted in the same amount and type of soil, given the same amount of water, and exposed to the same amount of light. After one year, the shoots will be counted for each plant.

Which of the following describes a random block design for this experiment?

A) The plants are numbered 01–90. Using a line from a random number table, the first 45 two-digit numbers, ignoring repeats and the numbers 91–99 and 00, represent the plants that will receive fertilizer. The remaining 45 plants will not receive fertilizer.

B) The plants are paired together based on similar size and numbered 1 and 2. Within each pair, a 6-sided number cube is rolled. If it lands on 1, 2, or 3, plant 1 receives the fertilizer and plant 2 does not receive fertilizer. If the cube lands on 4, 5, or 6, plant 1 does not receive fertilizer and plant 2 receives fertilizer. This is done for each of the 45 pairs of plants.

C) The plants are grouped based on variety. There are 30 plants of each variety. The plants within each variety are numbered 1–30, and the numbers are put in a random number generator. The first 15 unique numbers represent the plants in each variety that will receive fertilizer and the remaining 15 numbers will represent the plants in each variety that will not receive fertilizer.

D) The plants are grouped based on size. The 30 biggest plants are placed in one group and the 30 smallest plants in another other group. The remaining 30 plants are placed in a third group. For each group, a coin is flipped. If the coin lands on heads then the group will receive the fertilizer. If it lands on tails, then the group will not receive fertilizer. Repeat this procedure for the other two groups.

Answer:

anaerobic

Explanation:

Answer:

Fermentation is anaerobic respiration and happens without oxygen. Glucose is converted to two ATP, ethanol, and carbon dioxide. Yeast fermentation is used to make beer and wine

Explanation:

Hope it helps!

Proteins are one of the most critical macromolecules found in living organisms, playing a wide range of roles. Proteins are made up of amino acids connected together in a particular sequence, which is dictated by the genetic code.

Proteins are one of the most critical macromolecules found in living organisms, playing a wide range of roles. Proteins are made up of amino acids connected together in a particular sequence, which is dictated by the genetic code. An amino acid is a molecule containing an amino group (-NH2) and a carboxyl group (-COOH).There are two isomers of amino acids: L-isomer and D-isomer. L-isomers are commonly found in living organisms, while D-isomers are rare or non-existent. For instance, only L-glucose is found in living organisms, even though D-glucose is also a stable isomer. When synthesizing proteins, only L-isomers are employed, and D-isomers are not used. This is due to the fact that protein biosynthesis is a natural process in which L-amino acids are specifically identified by ribosomes and integrated into protein molecules. Therefore, synthesizing protein with D-amino acids is not feasible. A protein consisting of only L-amino acids would have a linear structure with a well-defined three-dimensional shape, whereas a protein consisting of both D- and L-amino acids would have a distorted three-dimensional structure. In summary, D-isomers are rare and not commonly found in living organisms, while L-isomers are commonly found. Proteins are synthesized using L-isomers because they are specifically identified by ribosomes and produce well-defined three-dimensional structures. If D-isomers are added during protein synthesis, the three-dimensional structure of the resulting protein product will be distorted.

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nahh .. it's okay ..

to be honest, I wanna answer but hmm .. I don't ..

The statement that is TRUE is option a) Morphogen concentrations and gradients are remarkably important during development.

Morphogens are signaling molecules that play a crucial role in determining the fate of cells during embryonic development. They are responsible for creating concentration gradients in developing tissues, which in turn lead to the formation of different cell types. The concentration gradient of morphogens helps to establish positional information in developing tissues, which is essential for the proper patterning of the organism. For instance, the concentration gradient of the morphogen Sonic Hedgehog is critical for establishing the pattern of digits in developing limbs. The importance of morphogens during development is evident from the fact that mutations in genes encoding morphogens or their receptors can lead to developmental abnormalities or birth defects. Morphogens are signaling molecules that play a crucial role in the process of embryonic development. They are responsible for guiding the differentiation of cells into various types, depending on their concentration and location within a gradient. These gradients help establish the spatial organization of tissues and organs during development, ensuring proper formation and function. Therefore, the statement that "Morphogen concentrations and gradients are remarkably important during development" is true.

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The statement "Ozone in the lower atmosphere is beneficial to human health" is false. Ozone in the lower atmosphere, also known as tropospheric ozone, is actually a pollutant that can have negative health effects. It is formed from the reaction of nitrogen oxides and volatile organic compounds in the presence of sunlight, and is a component of smog. It can cause respiratory problems, and has been linked to an increase in asthma and other lung diseases.

Ozone in the lower atmosphere is false because ozone in the lower atmosphere does not exist naturally. Ozone is a molecule made up of three oxygen atoms (O3). Ozone is found in the Earth's stratosphere, which is the layer of atmosphere located 7-30 miles above the Earth's surface. This layer of the atmosphere is known as the ozonosphere and it is here that the ozone layer is located. Ozone in the stratosphere is naturally produced from the reaction of sunlight with oxygen molecules in the air. Ozone in the lower atmosphere, however, is not naturally produced.

Ozone in the lower atmosphere, or troposphere, is instead created by man-made sources. These sources include combustion of fossil fuels, such as those used in automobiles, power plants, and industrial processes. The burning of these fuels releases nitrogen oxides and volatile organic compounds into the air. When these compounds reach the atmosphere, they react with the sunlight and form ozone in the lower atmosphere.

The presence of ozone in the lower atmosphere is a problem because it is a harmful pollutant. Ozone in the lower atmosphere is harmful to human health because it can irritate the respiratory system and is linked to a variety of health problems.

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Answer:

The plasma membrane is a thin layer of lipid molecules that surrounds the cell and separates the inside from the outside. The fluid mosaic model describes the structure of the plasma membrane as a two-layered structure of phospholipids with embedded proteins. This model explains how the structure of the plasma membrane allows it to act as a selective barrier, regulating the movement of substances in and out of the cell.

Structure S in the plasma membrane is represented by the phospholipids, which form a lipid bilayer with hydrophilic heads facing outwards and hydrophobic tails facing inwards. The hydrophilic heads are in contact with the extracellular fluid and intracellular fluid while the hydrophobic tails are in the middle of the membrane. The phospholipid bilayer provides a barrier that separates the inside and outside of the cell, restricting the movement of hydrophilic and large molecules through the membrane while allowing the passage of small and hydrophobic molecules.

Structure T represents the integral membrane proteins that are embedded in the lipid bilayer. These proteins have different functions, such as transport of molecules, cell signaling, and catalyzing chemical reactions. The proteins also contribute to the selective permeability of the membrane by regulating the movement of specific molecules in and out of the cell. For example, channels and carrier proteins regulate the movement of ions and larger molecules through the membrane while receptor proteins receive signals from the outside of the cell and relay them to the inside of the cell.

In summary, the plasma membrane is mainly composed of phospholipids and proteins according to the fluid mosaic model. The phospholipids form a lipid bilayer that acts as a barrier, while the proteins embedded in the bilayer regulate the selective permeability of the membrane by facilitating the movement of specific molecules in and out of the cell.

Explanation: