Choose the CORRECT statement(s) concerning water.
water is a polar molecule
water is the most abundant molecule in the body
60-70% of total body weight of most organisms is water
due to hydrogen bonding, water molecules are cohesive
all of the above are correct

Because they are hydrophobic, lipids are a diverse group of compounds (true)

Lipids are a class of hydrophobic compounds that include fats, oils, waxes, phospholipids, and steroids. At their core, most lipids are hydrocarbons, which are molecules with many nonpolar carbon-carbon or carbon-hydrogen bonds. Because of the abundance of nonpolar functional groups, lipids have a hydrophobic ("water-fearing") character, and most lipids have low water solubility. Lipids can perform a variety of functions in biological systems, including energy storage, insulation, barrier formation, and cellular signaling, depending on their physical properties (encoded by their chemical structure). Most new biology students may be surprised by the diversity of lipid molecules and their range of biological activities. Let's start with a fundamental understanding of this class of biomolecules.

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Answer:

???????????

Explanation:

This population pyramid is still a graph showing displays the spread of ages among a population split down the middle among male and female population members.

age distribution, also known as age composition, is the proportion of people for each age group within a particular population in demographic research. A significant cause that age ranges vary among countries is because of variations in marriage rates or trends.

The distribution of people might be uniform, random, or in groups. A population is said to be homogeneous if it's evenly spaced, random if it isn't, and clustered when it is.

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The value of the equation illustrated as a+b-2c take 3a+2b-4c is 2c - b.

An equation is the statement that illustrates the variables given. In this case, two or more components are taken into consideration to describe the scenario. It is vital to note that an equation is a mathematical statement which is made up of two expressions that are connected by an equal sign.

Based on the information, from a+b-2c we are to take away a+2b-4c.

This will be illustrated this:

(a + b - 2c) - (a+2b-4c)

Collect like terms

a + b - 2c - a - 2b + 4c

a - a + b - 2b - 2c + 4c

-b + 2c

= 2c - b

The value is 2c - b.

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Complete question

From a+b-2c take away a+2b-4c

Answer: color, cleavage, clarity, durability, and crystal system

Explanation: color - distinctly green color that ranges between bluish green and slightly yellowish green.

cleavage - one direction of imperfect cleavage

clarity - almost every natural emerald has eye-visible characteristics that can be inclusions, surface-reaching fractures, or healed fractures. Treatments to fill the fractures with oils, waxes, polymers, flux and other materials to reduce their visibility has been common practice for hundreds of years.

durability - emerald is very hard, but almost all specimens have inclusions and surface-reaching fractures that compromise their durability

crystal system - hexagonal

During gastrulation, Cells migrate from the ectoderm to form the mesoderm, resulting in the formation of three cell layers. The correct option is B

After fertilization of the egg, a crucial process known as gastrulation takes place throughout the early stages of embryonic development. It involves the reorganization and differentiation of embryonic cells, resulting in the development of the endoderm, mesoderm, and ectoderm, the three germ layers. All the different tissues and organs in the growing embryo are derived from these germ layers.

The endoderm, mesoderm, and ectoderm are formed during gastrulation by a series of cellular and morphological changes that occur within the blastula.

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The parallel variation of Heliconius melpomene and Heliconius erato butterflies, as shown in Figure 1, can be discussed in terms of their pros and cons.

Pros:

1. Genetic Diversity: The presence of multiple races within each species (with parallel counterparts) indicates a high level of genetic diversity. This diversity can contribute to the adaptive potential of the species, enabling them to better respond to changes in their environment.

2. Ecological Adaptation: The parallel variation suggests that each race has adapted to specific ecological conditions. This adaptation allows the butterflies to occupy different niches within their habitat, reducing competition between races and potentially enhancing their overall survival and reproductive success.

3. Evolutionary Potential: The parallel variation observed in Heliconius melpomene and Heliconius erato provides an opportunity to study the mechanisms of speciation and evolutionary processes. By comparing the characteristics and behaviors of parallel races, researchers can gain insights into the factors driving divergence and the formation of new species.

Cons:

1. Hybridization Risk: The presence of parallel races in sympatry increases the likelihood of interbreeding between different races of the two species. Hybridization can potentially lead to genetic mixing and loss of distinct characteristics, jeopardizing the integrity of each species.

2. Increased Complexity: The parallel variation can make it challenging to identify and classify different races, as there may be overlapping traits and intermediate forms. This complexity can hinder accurate species identification and make it difficult to understand the evolutionary relationships between races.

3. Conservation Concerns: The conservation of Heliconius butterflies becomes more complex when considering the parallel variation. Each race may have unique ecological requirements, making it crucial to protect the specific habitats and resources associated with each race in order to ensure their survival.

In conclusion, the parallel variation of Heliconius melpomene and Heliconius erato butterflies presents both advantages and challenges. The genetic diversity, ecological adaptation, and evolutionary potential are positive aspects, but the risks of hybridization, increased complexity, and conservation concerns should also be taken into consideration when studying and conserving these butterfly species.

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Answer:

It is an exergonic reaction, with much of the energy lost as heat, which potentially might damage cells

Explanation:

Cellular respiration is an important process carried out by the cells of living organisms in order to supply energy needed for their various cellular functions. Cellular respiration generally involves the breakdown of the stored energy in glucose molecules (in the presence of absence of oxygen).

However, since the process of cellular respiration releases energy as chemical energy (ATP) and majority as heat energy, it is said to be an EXERGONIC REACTION i.e energy-releasing. This hear energy released can damage living cells, which is a major setback to cellular respiration.

Im answering here to not only agree to the other person answering before me. I am also here to allow you to post brainliest for the other guy

Answer:

It provides support and maintains the cells shape.

Explanation:

Scientific laws are summaries or declarations that include a wide variety of observations and experimental findings. On the other hand, scientific theories offer explanations for findings and observations. Therefore, laws define what occurs, and theories explain why it does.

A fact is a straightforward observation, but a law is a statement (typically a mathematical equation) describing the relationship between facts. A scientific theory is different from a scientific fact or law in that it explains "why" or "how." A scientific law is an account of an occurrence. That occurrence can be explained by scientific theory.

In other words, while scientific laws predict what will happen in a natural event, scientific theories are ideas that explain natural events. The functions of scientific laws and hypotheses differ.

A scientific law foretells the outcomes of particular initial circumstances. It may tell you what color hair your unborn child would have or how far a baseball will travel when launched at a specific angle. In contrast, a theory seeks to offer the most plausible justification for why events take place the way they do.

A hypothesis may use gravity to explain the parabolic flight of a baseball or dominant and recessive genes to explain how brown-haired parents produced a red-headed child. Simply put, a theory suggests why something occurs while a law predicts what will happen.

Although the growth of one frequently spurs advancement on the other, a theory will never mature into law. we constantly propose, criticize, update, or even replace our scientific theories.

Even if there may still be gaps in our understanding, scientists tend to favor the hypothesis that can explain the majority of the facts after more research. Even false notions can be useful.

Modern chemistry was developed from discredited alchemy, and medicine advanced much before we fully comprehended the functions of germs and viruses. Nevertheless, improved ideas frequently result in fascinating new findings that were unthinkable in the past.

Furthermore, we shouldn't take it for granted that all of our scientific hypotheses will hold up over time. It only takes one unexpected outcome to upset the current quo.

A current scientific theory is not made weaker by its susceptibility to some hypothetical superior explanation, though. Rather, it protects science from becoming unquestionable dogma. A good scientific law is like a well-tuned machine that does its job flawlessly but doesn't know why it accomplishes it that way.

A strong scientific theory resembles a battered but unbowed warrior who runs the risk of losing if they can't overcome or adjust to the next challenger. Though they are distinct, science requires both laws and theories to grasp the big picture.

Scientific laws are distinct from theories in that they typically describe a more limited range of circumstances. The link between two particular forces or between two substances that are changing during a chemical reaction may be explained by scientific law. Theories usually cover a wider range of topics and concentrate on the how and why of natural events.

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Answer:

I think it's A

must lie btn a clearly defined interval

Continues variable must be between a clearly defined the interval about continuous variables. Thus,option A is correct.

A continuous variables is define as a function which continuous varies in a given interval for instance, if a variable over a non-empty range of the real numbers is continuous, then it can take on any value in that range.

Types of continuous variables:

There are two types of continuous variables which are mentioned below:-

1:- Instant variable

2:- Ratio variable

Instant variable

A variable can be defined as the distance or level which are varies between given interval.

Ratio variable

Ratio variable is another type of continuous variables which has only one variation in given interval.

Therefore, continues variable must be between a clearly defined the interval about continuous variables. Thus, option A is correct.

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A bacterial strain that does not produce the enzyme X would be able to grow on medium that has been supplied. Nutrients II, III, and IV are all necessary for growth.

The tRNA is 3'-UAC-5' on one end and binds to an mRNA codon that is 5'-AUG-3' on the other end through complementary base pairing. The amino acid methionine, which is the one the mRNA codon AUG specifies, is carried by the opposite end of the tRNA.

As a result, information moves from DNA to RNA to protein during the expression of a gene that codes for proteins. The main tenet of molecular biology is that information flows in one direction.

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Title: Effects of Mindfulness-Based Interventions on Stress and Anxiety in College Students: A Meta-Analysis

Background: Mindfulness-based interventions (MBIs) have been increasingly used to address stress and anxiety in college students. However, the effectiveness of these interventions remains unclear. This meta-analysis aimed to evaluate the effects of MBIs on stress and anxiety in college students.

Methods: A systematic literature search was conducted, and a total of 12 studies were included in this meta-analysis. The quality of the studies was assessed using the Cochrane Risk of Bias tool. A random-effects model was used to estimate the effect sizes of MBIs on stress and anxiety.

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Answer:

D

Explanation:

D: the effect of environment on gene expression.

Answer:

B: a mutation that occurs in the presence of sunlight

Explanation:

The color of these corn kernels is due to exposure of sunlight. Explanation: The corn kernels stay yellow if they are not exposed to sunlight and turn red when they are.

Hope this helps :)

Answer:

I think the answer is hypothesis

Answer:

There is no cartilage but there is epithelium

Explanation:

The pharynx of the human respiratory system does not contain cartilage.

The pharynx,  part of the human respiratory system, is a muscular tube that connects the nasal cavity and mouth to the larynx and esophagus. It serves as a passage for  air and food. The gorge is made up of several regions, each with its own distinctive features.

The nasopharynx, the top part of the throat, contains no cartilage. Instead, it is lined with pseudostratified ciliated  epithelium.This special epithelium helps to trap and transport mucus along with any particles or pathogens in the digestive system for elimination.

These regions also lack cartilage but  are lined with  stratified squamous epithelium. This type of epithelium provides protection from mechanical stress and potential abrasion caused by the passage of food and other substances down the pharynx.

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Answer:

Eukaryotic

Explanation:

This is the answer on edge 2021

If someone does not have freckles, it suggests that their genotype lacks the genetic variants associated with freckle formation. Freckles are a result of the interaction between genetic factors and exposure to sunlight.

The presence or absence of freckles is determined by variations in genes related to pigmentation, specifically the MC1R gene.

The MC1R gene plays a role in regulating the production and distribution of melanin, the pigment responsible for determining skin, hair, and eye color.

Certain variants of the MC1R gene are associated with increased melanin production, leading to the formation of freckles in response to sun exposure.

If an individual does not have freckles, it suggests that they do not carry the specific genetic variants associated with freckle formation. This can be inferred from the absence of freckles in their phenotype.

However, it is important to note that the absence of freckles does not necessarily mean the complete absence of genetic variants related to pigmentation.

There could be other genetic factors influencing their skin pigmentation and melanin production, which may result in different phenotypic traits.

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Answer:

Heredity

Explanation:

i have no idea

GL

Answer:yes it's Heredity

Explanation:

Answer:

Principles of Geology, which influenced Darwin, was written by Charles Lyell

Explanation:

Answer:

Humans eat food for various reasons, including providing energy to the body, obtaining essential nutrients, maintaining health, experiencing pleasure, participating in social and cultural events, and dealing with emotional stress. The reasons are influenced by a variety of factors such as individual preferences, cultural norms, and emotional state.

The process of digestion involves several tissues, organs, and biological systems, which work together to break down food and absorb nutrients. These systems include the digestive system, the circulatory system, the nervous system, and the endocrine system.

The mouth, oesophagus, stomach, small intestine, large intestine, pancreas, liver, and gallbladder are among the organs that make up the digestive system. These organs work together to digest food, break it down into its component parts, and absorb nutrients.

The mouth and stomach break down food mechanically, while the small intestine and pancreas break it down chemically. The liver produces bile, which helps to break down fats, and the gallbladder stores and releases bile as needed.

The circulatory system is also involved in digestion, as it transports nutrients from the small intestine to the rest of the body. The nutrients are absorbed into the bloodstream and transported to the liver for processing.

The digestive, circulatory, nervous, and endocrine systems work together to break down food, absorb nutrients, and regulate digestion.

The nervous system helps to regulate digestion by sending signals to the digestive system to stimulate or inhibit the release of digestive enzymes and hormones. The vagus nerve, which connects the brain to the digestive system, plays an important role in this process.

The endocrine system produces hormones that regulate digestion, such as insulin and glucagon, which help to control blood sugar levels. These hormones are produced by the pancreas and released into the bloodstream.

All of these systems work together to ensure that food is broken down and nutrients are absorbed efficiently. For example, the digestive system breaks down food into small enough particles for absorption, while the circulatory system transports the nutrients to the rest of the body.

The nervous system and endocrine system regulate the digestive process to ensure that it occurs at the right pace and that nutrient absorption is optimized.

These systems must work together to ensure that the body can extract the nutrients it needs from food and maintain overall health.

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Answer:

Yes, some cells are able to move on their own. This type of movement is known as cell motility, and it is a crucial aspect of many biological processes, such as embryonic development, wound healing, and immune response.

There are different mechanisms by which cells can move. Some cells, such as bacteria and sperm cells, have flagella or cilia that allow them to swim or move through fluids. Other cells, such as white blood cells, use a process called amoeboid motion, where they extend and retract membrane protrusions to move forward.

In addition, some cells are able to migrate through tissues and organs by sensing and responding to chemical cues in their environment. This type of movement is known as chemotaxis, and it allows cells to move towards or away from specific chemicals.

So, in summary, while not all cells are able to move on their own, many types of cells have the ability to move through various mechanisms.

Explanation:

Answer:

In explanation.

Explanation:

What is the definition of that device which makes work easier that is called a simple machine?

-A simple machine is any device that makes work easier by changing force. Machines that consist of two or more simple machines are called compound machines.

How? There are many ways simple machines make work easier:

-The wheel and axle is a machine in which the wheel is attached to a central axle.

1. Machine makes work easier by changing the amount of force you need to exert.

2. The distance over which the force is exerted.

3. The direction in which you exert your force by increasing the distance through which force is applied.

4. Changing the direction of applied force, by multiplying the force of speed of the energy applied.

-Hope this helps.

Answer:

Explanation:

vPoint Source - a source of water discharged to surface water through a discrete point - generally through a pipe, ditch, or channel.

Nonpoint Source - Nonpoint sources, such as parking lots or athletic fields, discharge runoff water to groundwater or surface water; runoff does not come from  a pipe, ditch, or channel. These sources may contain pollutants such as pesticides, motor oil, and soaps.

Navigable Waters of the United States  For the purposes of the Clean Water Act, the term "navigable waters" includes:

all waters used in commerce, including groundwater;

all interstate waters including wetlands, mudflats, and sand-flats; and

all other waters such as lakes, rivers, streams, wetlands and sloughs.

EPA policy states, "The majority of facilities in the U.S. have the potential to discharge to navigable waters."  The Supreme Court decision in (2006) requires the Army Corps of Engineers and the EPA to determine whether there is a "significant nexus" between a navigable waterway and an area a spill might affect.  In June of 2007, EPA and the Army Corps of Engineers released provisional interpretive guidance regarding the "significant nexus” question. According to this guidance, the agencies will assert jurisdiction over traditional navigable waters, wetlands adjacent thereto, and relatively permanent tributaries thereof. The agencies will generally not assert jurisdiction over swales and ditches that lack routine water flow. Finally, the agencies will apply the "significant nexus" requirement and make a case-by-case, fact-specific analysis on impermanent tributaries and other wetlands.

Additional executive orders were issued 2015 in 2019.  Under the 2019 proposal, traditional navigable waters, tributaries to those waters, certain ditches, certain lakes and ponds, impoundments of jurisdictional waters, and wetlands adjacent to jurisdictional waters would be federally regulated. It also details what are not "waters of the United States," such as features that only contain water during or in response to rainfall (e.g., ephemeral features); groundwater; many ditches, including most roadside or farm ditches; prior converted cropland; stormwater control features; and waste treatment systems.

Could the requirement for one or more NPDES Discharge Permit apply to my campus?

If your campus discharges pollutants directly to navigable waters of the United States through a point source, you must obtain an NPDES permit or redirect the flow of the waste.

Stormwater releases from certain activities require an NPDES permit. The most common activities on college campuses requiring NPDES permits for stormwater are construction activities disturbing more than 1 acre, hazardous waste storage areas operating under the Resource Conservation and Recovery Act permit system, steam-generating power plants, and airports. See Stormwater section below.

Regulations issued by local water authorities, or Publicly Owned Treatment Works (POTWs), not NPDES permits, govern discharges into sanitary sewer systems. See Sewer Use (POTW) section below for more information about requirements for using POTWs for commercial or industrial waste disposal.

What do I have to do related to NPDES Discharge Permits?

Determine where wastewater flows from buildings and processes on your campus. Any industrial or commercial operation (e.g., ice rink melt pits, floor drains, and vehicle wash stations) that discharge into a water of the United States may require an NPDES permit. If required, you must obtain such a permit from the appropriate regulatory agency, probably your state environmental agency.

French drains, dry wells, and septic system leach fields are different from point source discharges because they do not immediately affect surface water. Some state and federal environmental agencies manage these systems under the Underground Injection Control program, part of the Safe Drinking Water Act. See Safe Drinking Water Act for more information.

Details of NPDES