. What organ is able to extract dissolved oxygen from water?

Answer: True

Explanation:

DNA is a biological evidence. It is a heredity material which is present in all organisms on earth. The DNA in humans can be taken as sample from nails, bones, blood, skin, hair and other sources.

The DNA samples can be taken so as to establish the identity of the culprit, victim or any one which is associated with crime.

The DNA evidence has applicability as a potent evidence in the court of law. Thus utmost care should be taken to preserve it's integrity until it is analysed and presented in the court of law.

Thus the DNA evidence should be collected and preserved in airtight containers so as to prevent the entry of airborne pathogens like bacteria, virus these can contaminate the sample evidence and can make the evidence not of any use.

Answer:

False

Explanation:

It can encourage growth of mold, so the samples should have ventilation.

SciGame Gamma is a math game focusing on geometry concepts including mathematical rules and theorems for high school students.

SciGame Gamma is a mathematical game designed to improve students' understanding and skills in geometry. In this game, players are presented with geometric shapes and angles, and they have to solve problems related to area, perimeter, angles, and geometric properties.

Players must apply mathematical rules and theorems to correctly answer questions and progress through the game. By engaging with SciGame Gamma, students can enhance their geometric reasoning and problem-solving abilities in a fun and interactive way.

The functional group found in both fatty acids and amino acids is the carboxyl group (-COOH).

A functional group is a specific group of atoms or bonds within a molecule that are responsible for its characteristic chemical reactions. Functional groups provide a means of predicting the reactivity of organic molecules and play a crucial role in organic chemistry.

Some common functional groups include alcohols (OH), carboxylic acids (COOH), amines (NH2), and alkanes (C-C). Understanding functional groups is essential for predicting the behavior of organic molecules and designing chemical syntheses. They are key to understanding the chemistry of many biologically important molecules such as proteins, carbohydrates, and lipids.

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Sapiens is the most specific taxonomic level in the classification system as mention in the question. This is because the species are the most specific taxonomic level in classification system which indicates that the sapiens are the species that make species are most specific taxonomic level.

Eukarya is domain. Animalia is kingdom. Chordata is phylum. Mammalia is class. Primates is order. Hominidae is family. Homo is genus and sapiens is specie therefore it is described that the species are most specific.

There are taxonomic levels are explained: Kingdom, phylum, class, order, family, genus, specie.

The answer is varied tidal action

Answer:

The correct answer is "Varied tidal action".

Explanation:

Varied tidal action refers to the presence of tides with different sizes and forces along a coast. This coastal dynamics characteristic limits the abundance of aquatic organisms because organisms must survive tidal action. Varied tidal action interferes with the adaptation of the aquatic organisms, as only a few organisms can survive this characteristic such as sea stars, sea urchins and sea cucumbers.

Answer:

Male (X Chromsome)

Explanation:

The mother is usually homozygous, meaning she has two of the same chromosome, so her offspring will get the same chromosome from her regardless. However, the father is heterozygous, meaning he has different chromsomes. Him passing down one or the either will determine the sex.

For example, in humans the mother passes the X, and then the father determines if it is a boy (passes down Y), or if it is a girl (passes down X).

The nervous system receives and sends electrical signals throughout the body.

The nervous system is the part of an animal that contains several nerves and specialized cells called neurons which receives and sends electric signals between various parts of the body. The nervous system is composed of the central nervous system (brain and spinal cord) and the peripheral nervous system (somatic and the autonomic nervous systems).

The answer is A whether the blastopore ultimately develops into a mouth or anus

i know because i just took a test and passed with this same question

Answer:

A. whether the blastopore ultimately develops into a mouth or an anus

Explanation:

The higher invertebrates are divided into two evolutionary lines named protostomes and deuterostomes based on whether the blastopore ultimately develops into a mouth or an anus. Blastopore is the first developement opening of archenteron (rudimentary alimentary canal) which appears during gastrula stage. If during embryonic development, the blastopore develops into mouth then the animal is known as protostome whereas development of anus from blastopore will make the invertebrate a deuterostome.

Invertebrates like annelids, arthropods and molluscs are examples of protostomes while echinoderms are examples of deuterostomes.

The given statement is False.

The rock cycle is equally important to the plants, animals and human beings. Rocks, soil and minerals are very important for the plants as it gives life to other organisms on earth. Humans beings are also dependent of rocks for many of its essential purposes. Animals also use cave made of rocks as a source of shelter.

Thus, rock cycle is equally important to living organism.

Final answer:

The rock cycle is fundamental to living organisms, affecting soil fertility, climate, and the carbon cycle, and it helps in understanding life's history through fossils. The statement is indeed false.

Explanation:

The statement that the rock cycle is not important to living organisms is indeed false. The rock cycle plays a crucial role in shaping the planet's surface, providing essential minerals and nutrients for soil development, which in turn supports plant growth and the broader ecosystem. Rocks also contribute to the regulation of atmospheric gases through processes such as weathering and erosion, which impact climate and living conditions for organisms.

Rocks host fossils that help scientists understand the history of life on Earth. Moreover, the rock cycle interacts with other cycles like the carbon cycle, influencing the global carbon budget and thereby affecting all life forms that depend on carbon for their biological processes.

The rock cycle can be described as a dynamic process involving the formation, breakdown, and reformation of rocks. Through igneous, sedimentary, and metamorphic processes, rocks are continuously transformed over vast timescales, although they may seem static to the human eye.

Movement of molecules through a membrane by filtration depends on hydrostatic pressure.

The correct answer is A. hydrostatic pressure.

Filtration is the movement of molecules through a membrane due to the force of pressure. In this case, hydrostatic pressure pushes molecules across a membrane. This process is commonly observed in the kidneys, where blood pressure pushes small molecules like water and solutes out of the blood and into the nephrons, which are specialized structures involved in urine formation.

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There are three types of carbon fixation in plants - C3, C4, and CAM fixation. C3 and C4 plants open their stomata during the day while CAM plants open stomata during the night. Mostly, plants fix carbon during the day. However, plants in arid locations, such as cactuses, use CAM carbon fixation because of adaptation to water deficiency. Their stomata are closed during the day and water loss is reduced. In the night when is colder, stomata open and carbon dioxide enters through stomata.

Answer:

In a cactus, carbon is fixed only during the night.

Explanation:

In the Calvin cycle, CO2 is transformed into carbohydrates. This happens in three stages: carbon fixation, reduction, and regeneration. It takes six cycles to produce a single glucose molecule.

In the Calvin cycle, carbon dioxide (CO2) molecules are used to produce carbohydrates like glucose (C6H12O6) thanks to the energy and reducing power of ATP and NADPH. This cycle in plants involves three stages. The first stage is fixation, where carbon dioxide is incorporated into an organic molecule by the enzyme RuBisCo.

Then, reduction occurs as the organic molecule is reduced with the help of NADPH. Finally, in regeneration, the cycle restarts as RuBP is regenerated. To produce a single glucose molecule, the Calvin cycle needs to be completed six times, until six carbon dioxide molecules are fixed.

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The discovery of cells was made possible by the invention and improvement of the microscope in the 17th century, particularly by Antonie van Leeuwenhoek. His work led to discoveries of bacteria, protozoa, and spermatozoa, allowing future advances in biological research.

The significant advance in technology that made the discovery of cells possible was the invention of the microscope. In the 17th century, two Dutch spectacle makers, Hans and Zacharias Janssen, invented a basic microscope with a magnifying glass. However, it was the development and improvement of the microscope, particularly by Antonie van Leeuwenhoek, that allowed for the detailed visualization of cells. Leeuwenhoek's microscopes had better clarity and greater magnifications compared to previous models, which led to his discovery of bacteria, protozoa, and spermatozoa. Furthermore, his work paved the way for future explorations into the cellular world.

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The answer is False

adults do not have about five times the number of connections that a 3 yr old has

Answer : Option B) Nonhuman life in an urban ecosystem differs from that in an undeveloped forest ecosystem.

Explanation : From the above information given, it can be simply concluded that humans have changed the environment around them. The human habitats are very different from the nonhuman life habitats. They have their own ecosystem designed for their comfort. This impacted the nonhuman life as they have different ecosystem in cities than in the forests.

The correct answer is (d) It would have more carbon dioxide.

The green plants that is present in the environment utilizes the carbon dioxide present in the environment. This carbon dioxide is utilized in the process called photosynthesis, and as a result of that oxygen is released into the environment. If there would have lesser number of plants that carry out photosynthesis then the amount of carbon dioxide will increase in the atmosphere.

Foxes make various noises like howls, screams, and squeaks, used for communication purposes. Deer also communicate through sounds like bleats, grunts, and barks, put to use based on the situation or interaction.

The sounds that animals make vary greatly. For example, foxes produce a range of noises that include howls, barks, screams and squeaks, often described as a sound between a bark and a scream. Foxes use these diverse sounds for communication, including attracting a mate or signaling danger.

On the other hand, deer make a different variety of sounds, including bleats, grunts, and barks. A doe (female deer) often uses a gentle, drawn-out bleat to call her fawns (babies) to her side. A buck (male deer) might use a strong grunt or a light spar to communicate with other deer.

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The two types of effectors in the body are muscles and glands, with muscles contracting or relaxing and glands secreting substances in response to stimuli. These responses, which can be voluntary or involuntary, are critical for maintaining homeostasis and are regulated through negative or positive feedback mechanisms.

Types of Effectors and Their Responses

The two types of effectors in the body which respond to stimuli are muscles and glands. Muscles respond to stimuli by either contracting or relaxing, while glands respond by secreting substances. These responses are crucial for maintaining homeostasis, the body's stable internal environment. For example, when the body needs to cool down, sweat glands (effectors) release sweat. Similarly, when blood glucose levels are low, cells in the liver (effectors) release glucose to raise the levels.

Responses can be voluntary, controlled by the somatic nervous system, as in the contraction of skeletal muscles; or involuntary, controlled by the autonomic nervous system (ANS). The ANS is further divided into the sympathetic and parasympathetic divisions, each initiating specific physiological responses. The sympathetic division typically produces a 'fight or flight' response, while the parasympathetic division promotes a 'rest and digest' state.

Feedback regulation plays a significant role in how effectors respond to environmental changes. Negative feedback reduces the original stimulus, while positive feedback increases it, both essential for homeostasis.

1. C. Metaphase (Chromosomes line up at the equator and spindle fibers attach to the centromeres of the chromosomes.)

2. F. Cytokinesis (Division of the cell cytoplasm once mitosis is complete)

3. E. Telophase (Before cytokinesis, 2 nuclear envelopes form around each set of chromosomes.)

4. A. Interphase (Before Mitosis begins, the cell prepares for division by increasing in size and duplicating the DNA.)

5. D. Anaphase (Sister chromatids are separated by spindle fibers and the 2 sets of identical chromosomes are pulled to opposite ends of the cell)

6. B. Prophase (Chromosomes condense the nuclear membrane breaks apart and spindle fibers form.)

During metaphase (C), chromosomes align at the equator, and spindle fibers attach to their centromeres, preparing for the subsequent separation.

Following mitosis, cytokinesis (F) takes place, dividing the cell's cytoplasm into two distinct daughter cells. In telophase (E), nuclear envelopes form around each set of chromosomes before cytokinesis begins.

Interphase (A) marks the period before mitosis, where the cell grows, duplicates its DNA, and readies itself for division. Anaphase (D) involves the separation of sister chromatids, pulled by spindle fibers to opposite ends of the cell.

Lastly, in prophase (B), chromosomes condense, the nuclear membrane breaks apart, and spindle fibers form, initiating the process of mitosis.

The sequence reflects the chronological order of events during cell division, illustrating the intricate and precisely orchestrated stages of the cell cycle.

The true information is that lipids are a type of fat, as option A shows.

Lipids are a type of fat that can have different names and forms, but they are always formed by molecules with hydrophobic heads formed by fatty acids and a hydrophilic tail formed by glycerol.

Lipids store energy that will be quickly used by the human body to carry out metabolism.

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Answer:

The process of photosynthesis makes glucose, which is used in cellular respiration to make ATP. In the process of cellular respiration, glucose is converted into carbon dioxide and water that is used in the process of photosynthesis.

The product of one process is the reactant of the other process, the chemical reaction of respiration is exactly opposite to the chemical reaction of photosynthesis.