which one of these exhibits a notochord at some stage in its development.

A. a cat
B. a hydra
C. a brittle star
D. a tapeworm

A mistletoe is a leathery-leaved parasitic plant that grows on apple. oak, and other broad leaf trees.

C biomass. hope this helps

i think it might be detritus

Answer :- Option 2 90 mm is correct.

Explanation :-

10.5 - 1.5 = 9.0 cm

So the length of the earthworm is 9.0 cm as seen from the scale.

1 cm = 10 mm

Thus, to convert 9.0 cm to mm

we need to multiply 9 by 10

9 X 10 = 90

So the answer is 90 mm.

The fireman being pushed back by the hose when water is turned on is an example of Newton's third law of motion, where for every action there is an equal and opposite reaction. This can be seen in activities such as running, swimming, and car acceleration.

The scenario of a fireman feeling the hose push him backwards when he turns on the water exemplifies Newton's third law of motion. According to this law, for every action, there is an equal and opposite reaction. Here are some everyday applications of this principle:

In the case of the fireman, when the water rushes out of the hose in one direction, it applies a force on the fireman in the opposite direction. This reaction force is what pushes the fireman backwards.

The scenario describes Newton's Third Law of Motion: For every action, there is an equal and opposite reaction.

When the fireman turns on the water, the water rushes out of the hose in one direction, and the hose pushes back with equal force in the opposite direction, which the fireman feels as a backward push. Newton's Third Law explains the interaction of forces between two bodies: as the water is expelled forwards, the hose and the fireman are pushed backwards. This is a direct result of the conservation of momentum, where the momentum of the water flowing in one direction must be balanced by an equal momentum in the opposite direction, experienced by the hose and subsequently the fireman. This reactive force is why handling a high-pressure hose can be challenging and requires strength and stability.

Prey populations rapidly increase. This is followed by an increase in the predator population: As predators eat the prey, their population goes down because there is less to eat and the predator population also goes down.

The answer is; D

Cold air mass from the surrounding, which is denser than warm air in the local system, moves in to replace the rising  warm air. This rushing cold air mass pushes the warm air further up the atmosphere  and causes the warm air mass to cool and form clouds. This condensation process is an exothermic process that further warms up the upper atmosphere hence creating a low pressure system in the region.    

The correct answer  is Transfer RNA.

Answer:

A

Explanation:

tRNA brings the amino acids to the ribosomes to complete protein synthesis.

Meiosis is the process that produces sperm and eggs by reducing the gamete cell's number of chromosomes from diploid to haploid.

Meiosis is a type of cell division that occurs in sexually reproducing organisms. It is responsible for producing haploid sperm and egg cells, which are needed for sexual reproduction. The process involves two rounds of division, called meiosis I and meiosis II, that results in four daughter cells, each with half the number of chromosomes as the parent cell. In the first division, homologous chromosomes are paired and separated, resulting in the formation of two haploid cells.

In the second division, the remaining chromosomes are separated, resulting in the formation of four haploid cells. This reduction in chromosome number is necessary for the proper formation of zygotes during fertilization and the maintenance of chromosome number in the offspring.

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The correct answer is : Mitosis, cell growth and differentiation.

Plants increase in height due to the activity of meristem or meristematic tissue. Meristems are tissues which have capacity to divide throughout their life. Meristems are located in the apical meristems, shoot apex and root apex. Meristems divide through mitosis. The daughter cells  enlarge, stretch and differentiate into other types of cells as they mature. This causes some plants to increase in height.

Final answer:

Some plants grow in height through mitosis, cell growth, and differentiation in the meristems. Mitosis provides new cells, which then enlarge and differentiate into specialized tissues, and this process contributes to the plant's overall growth.

Explanation:

Plant Growth and Development

Some plants increase in height due to changes in specialized regions of cells in the tips of their branches, primarily through processes such as mitosis, cell growth, and differentiation. Mitosis is the mechanism behind cell division in the meristems, which are areas of rapidly dividing unspecialized cells. This process produces new cells that can then grow in size and differentiate into specialized plant tissues like xylem and phloem. Cell growth often refers to the enlargement of the cell, particularly through the expansion of the vacuole. Differentiation is the process by which cells become specialized in structure and function to contribute to the various tissues in the plant.

Meristematic tissue plays a key role in plant growth. This tissue is composed of small, unspecialized cells that have the potential to divide and differentiate. Growing plants rely on the meristems for the continuous supply of new cells that will eventually expand and become specialized, pushing the plant upwards and increasing its overall size. The actual growth of plants generally occurs in areas adjacent to these meristems.

wax represents rock. different colors means different types of rock. the squeezing n folding represent rocks being compressed n folded together. heating in pan is rock getting heated. the whole experiment demonstrates how metamorphic rock is formed.

The student's experiment demonstrates the rock cycle process by using colored wax shavings to represent different rocks and minerals and simulating the pressure, heat, and cooling that rocks experience.

The rock cycle is a continuous geological process that describes how rocks are formed, transformed, and recycled over time. It involves three main types of rocks—igneous, sedimentary, and metamorphic—changing through processes like cooling and solidification, erosion and sedimentation, and heat and pressure, creating a dynamic Earth's crust.

The student's experiment most likely demonstrates the process of the rock cycle. The colored wax shavings represent different types of rocks and minerals, while the squeezing and folding actions simulate the pressure and heat within the Earth that cause rocks to undergo changes. Heating the pile until the wax melts represents the melting of rocks, while cooling it overnight represents the solidification of molten rock.

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The answer is; Divergent boundary zone; volcanic activity; fissure zones

The mid-Atlantic ridge is a divergent boundary. Such a boundary, that majorly occurs in ocean beds, is exhibited by signs of ocean-floor spreading. As the two plates move away from each other, the magma from the mantle rises to fill the void. Mountain ranges form along the boundary due to the numerous fissures between the two plates.

Answer:

its a

Explanation:

I believe the answer tis true. I think it's a solar panel.

12) B. The organism would suffer as its cells would be less able to provide the energy needed to carry out life functions.

13) D. The central vacuoles in the cells lose water and can no longer help support the cells.

14) A. It acts as a framework inside the endoplasmic reticulum and keeps it from collapsing.

15) D. The cell's energy level will diminish as the enzyme decreases.

16) C. Whales are able to conserve oxygen better than humans.

17) A. Glycolysis  

18) i dont know this one but maybe B

19) B. It is turned into more chlorophyll for the plant.

20) B. The chloroplasts would be unable to generate ATP.

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Final answer:

Cell structure and transport refer to the components of cells and the mechanisms they use to move substances across the cell membrane. This includes the semi-permeable cell membrane structure, passive and active transport processes, and role of the cytoskeleton in cell organization and movement.

Explanation:

Cell Structure and Transport

The study of cell structure and transport mechanisms is a fundamental aspect of high school Biology. Cells are the basic units of life, and understanding their structure and function is essential for grasping wider biological concepts. The cell membrane plays a crucial role in maintaining a cell's environment through its selective permeability, which allows certain substances to pass while excluding others, contributing to cell homeostasis.

Components of Cell Structure

Key components include the cell membrane, cytoplasm, cytoskeleton, and in eukaryotic cells, organelles such as the nucleus, mitochondria, and endoplasmic reticulum. The cytoskeleton helps organize the cell, enables cell movement, and transports materials.

Transport Across Cell Membranes

Transport mechanisms across the cell membrane include passive transport (such as diffusion and osmosis), which does not require energy, and active transport, which does require energy to move substances against their concentration gradient. Additionally, bulk transport methods like endocytosis and exocytosis move large particles or volumes.

Extinction refers to the eradication of an entire Species. Hope this helped!

Final answer:

Extinction is the eradication of an entire species from Earth, with no living members remaining. It can result from specific extinction events or be part of a mass extinction, which affects many species over a short geological time period.

Explanation:

The term extinction refers to the complete elimination of an entire species, signifying that no members of the species remain alive anywhere on Earth. An extinction event could be a specific occurrence that causes the disappearance of a species, such as environmental changes or human activities. While some extinctions occur isolatedly, a mass extinction is a more catastrophic event or environmental condition that wipes out the majority of species within a relatively short geological time frame, such as the Cretaceous-Paleogene extinction event that resulted in the demise of the dinosaurs. Historically, Earth has undergone several mass extinctions, and some scientists speculate that we may be experiencing another one, termed the Holocene extinction event, mainly due to human impact on the environment.

A nucleotide in DNA is made up of a deoxyribose sugar, a phosphate group, and one of the four nitrogenous bases. Any other element, such as an amino acid, is not part of a nucleotide in DNA.

A nucleotide in a DNA molecule comprises three components: a deoxyribose sugar, a phosphate group, and one of the four nitrogenous bases (adenine, thymine, guanine, and cytosine). Therefore, any element that is not one of these three could be considered as not a part of a nucleotide in a DNA molecule. For instance, the amino acid is not part of a nucleotide in DNA. Amino acids are the building blocks of proteins, not DNA.A nucleotide is composed of three main components: a nitrogenous base, a sugar molecule, and a phosphate group. In DNA, the four nitrogenous bases are adenine (A), thymine (T), cytosine (C), and guanine (G). The sugar molecule in DNA is deoxyribose. The phosphate group is a group of atoms containing phosphorus and oxygen. Therefore, the correct answer is phosphate group.

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The functional unit of the kidney is nephron. Kidney comprises two kinds of nephrons, each situated in distinct sections of the renal cortex, that is, juxtamedullary nephrons and cortical nephrons. A nephron constitutes of a renal tubule, renal corpuscle, and the associated network of capillaries. The nephron is accountable for eradicating waste from the body.  

The functional unit of lungs is alveoli. They resemble a cluster of grapes, they are thin and possess moist walls. They are a single layer of cells enveloped by a layer of capillaries. The main function of the lungs is respiration. The alveoli help one to breathe, by conducting the process of gas exchange.  

the answer is A. They are used as fuel.

The two parts of the mitochondria are the outer membrane (forming the boundary) and the inner membrane (folded to create cristae), with the inner membrane being crucial for energy production through the electron transport chain and ATP synthesis.

The two main parts of the mitochondria are the outer membrane and the inner membrane. The outer membrane forms the boundary of the mitochondrion and acts as a protective barrier. It contains porin proteins that allow the passage of small molecules. The inner membrane, on the other hand, is highly folded, forming structures called cristae that increase its surface area. This membrane plays a crucial role in energy production. It houses proteins and enzymes involved in the electron transport chain and ATP synthesis, which are key processes in cellular respiration.

The inner membrane is impermeable to most molecules and maintains an electrochemical gradient necessary for ATP production. Together, the outer and inner membranes of the mitochondria contribute to its function as the powerhouse of the cell, generating energy in the form of ATP.

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C is the correct answer they are asymmetrical.

Sponges, belonging to the phylum Porifera, don't have any particular symmetry. They do not exhibit radial or bilateral symmetry as seen in other animal phyla. Their body forms can vary widely.

The type of symmetry that sponges have is none. Symmetry in biological terms refers to the arrangement of body parts in relation to an axis or plane. The two types of symmetry common in animals are radial and bilateral, but these do not apply to sponges. Sponges, belonging to the phylum Porifera, do not have any particular symmetry, which means their forms can vary widely and lack a regular, mirrored arrangement of parts.

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1. Air quality – The higher the population in a city the higher the chances of reduced air quality due to increase per capita emissions.

2. Water usage – The higher the population density in a city, the harder it is to supply adequate clean water to everybody and the water quality may begin to drop

3. Waste management- Pollution begins to become a problem when the population in a city goes beyond its carrying capacity.

4. Land use – Urban sprawl becomes a problem when a high proportion of the city’s population is squeezed in a small portions of land

Carrying capacity is the maximum sustainable population size that an environment can support without deterioration. In U.S. cities, signs of reaching this capacity include increased pollution, water shortages, and housing issues.

Carrying capacity is defined as the maximum number of individuals of a population that an environment can sustain indefinitely without environmental degradation. It involves a balance between the population size and the available resources such as food, habitat, water, and the ability of the environment to recycle waste and nutrients. Human carrying capacity, specifically, refers to how many people can be supported by the Earth's resources without causing harm to the ecosystem.

In urban areas of the U.S., indications that a city may be reaching its carrying capacity can include:

While technological advancements can alter carrying capacity over time by improving the efficiency of resource use, it remains a crucial concept for policy development aimed at sustainability.

Mitosis because photosynthesis is the process of making glucose, interphase is in between the cell dividing process, and meiosis is division for sex cells.

Answer:

C.Mitosis

Explanation:

DNA is coiled into proteins,,,,which makes up ur DNA (about  6,400,000,000 basepairs (DNA building blocks) that make up your DNA) basically...and...The way DNA is packaged into chromatin is a factor in how protein production is controlled. so in your nucleus....AGAIN....DNA IS KEPT OR COILED AROUND PROTEIN YET KEPT IN UR NUCLEUS... :)

... i hope this helps somewhat..

chromosome is made up of DNA tightly coiled many times around proteins called histones. protein is kept inside your nucleus

Answer: requires no energy from the cell

Explanation:

There are two major ways that molecules can be moved across a membrane, and the distinction has to do with whether or not cell energy is used. Passive mechanisms like diffusion use no energy, while active transport requires energy to get done

Final answer:

Passive transport is a naturally occurring phenomenon that allows small molecules or ions to move across the cell membrane without the input of energy. It includes diffusion, osmosis, and facilitated diffusion.

Explanation:

Passive transport is a naturally occurring phenomenon in which small molecules or ions move across the cell membrane without the input of energy by the cell. It includes three main types: diffusion, osmosis, and facilitated diffusion. In diffusion, substances move from an area of higher concentration to an area of lower concentration down a concentration gradient. Osmosis is the movement of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration. Facilitated diffusion involves the use of carrier proteins or channel proteins to move substances across the membrane.

I'd say flagella.

Hope you find it helpful!

Prevailing westerlies belt is a global wind belt found in the middle latitudes.

Predominant winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude are known as the westerlies, anti-trades, or prevailing westerlies. They steer extratropical cyclones in this general way, beginning in high-pressure regions at horse latitudes and moving toward the poles.

Consequently, the polar easterlies are the result of air movement in the polar cell circulation. The predominant westerlies are the result of air movement in the circulation cell that exists between 60° and 30° north.

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Answer:

the answer to this is A.

Native gold is an element and a mineral

Short answer: Silver and Gold found in rock formations (mostly)

Water is a liquid solvent

Plant life has minerals in it, but plants are made mostly of organic cells.

Correct matching of invertebrates and its characteristics are as follows:

Sponges are animals which have many cell but no mouth, muscles , heart or brain. They are sessile and can not move from place to place like other animals do, filter feeding animals with an asymmetrical body plan.

Cnidarians are the animals with radial symmetry and stinging cnidocyte cells. These animals consists a special cell cnida which functions in preying catch and defense. example- jellyfish, anemone.

Flatworms are the worm like animal which do not consist a body cavity or coelom. example- fluke and tapeworms.

Roundworms or threadworms are segmented worms that can live in water or land. They consist a body cavity and internal organs. examples- pinworms and hookworms.

Mollusks are the animals which consist mentle, foot and and sometimes a shell. example- octopus, squids.

Echinoderms are the animals which have radial symmetry and an endoskeleton made out of calcareous plate. These animals live only in marine environment.These animals lack circulatory and excretory systems.

Arthopods are the animals with jointed legs and an exoskeleton made out of chitin. example- spiders, shrimps and crabs.

First is those with joined legs.

The second have a foot, and shells.

The third  are round-worms are segmented and have cavity.

Fourth have radial symmetry.

Fifth don't consist of body cavity

The sixth are unable to move from places.  

The seventh live in water environment.

The anthropoids are insects that have an exoskeleton and bilateral symmetry. They have no open circulatory system. The mollusks are snails, clams, and squids. They have bilateral symmetry.  The roundworms are heartworms and nematodes. They have a digestive system mouth and anus. The flatworms are tapeworms and most are parasitic are bilateral and are invertebrates.

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i believe it might be "implicitly"

Answer:

deep sea trench

Explanation: