Can someone help me win my homework

Answer:

I didn't understand the question..but here is the definition

Explanation:

Definition of Stelar System:

According to the older botanists, the vascular bundle is the fundamental unit in the vascular system of pteridophytes and higher plants. ... Thus the stele is defined as a central vascular cylinder, with or without pith and delimited the cortex by endodermis.

Answer:

Explanation:

Secondary energy resources are those which do not occur naturally but which are obtained from one or more of the primary energy resources. Example: Petrol or gasoline, electrical energy from coal burning, hydrogen obtained by electrolysis of water etc. Non-commercial source of energy: Firewood, cow dung , and vegetable wastes.

Answer:

The kingdom Plantae consists of four major plant groups on land: bryophytes (mosses), pteridophytes (ferns), gymnosperms (cone-bearing plants), and angiosperms (flowering plants). Plants may be categorized as vascular or nonvascular. A vascular plant has tissues for transporting water or sap. Nonvascular plants do not.

Answer:

true

Explanation:

The fatty acid chains are the uncharged, nonpolar tails, which are hydrophobic. Since the tails are hydrophobic, they face the inside, away from the water and meet in the inner region of the membrane.

The statement "the tail portion of the phospholipid molecule is hydrophobic" is definitely true.

Phospholipid may be defined as an amphipathic molecule that is constructed from four components. They are fatty acid, a platform to which fatty acids are attached, a phosphate, and an alcohol attached to the phosphate.

The molecule of phospholipid has a polar head and a non-polar tail. The polar head is known as hydrophilic and a non-polar tail is known as hydrophobic.

Such types of tails move away with water, hence they are significantly found at the inner side of the membrane and form a type of barrier.

These tails of phospholipids are typically uncharged which expel water and separates the internal contents of the cell from its outer environment.  

Therefore, the statement "the tail portion of the phospholipid molecule is hydrophobic" is definitely true.

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First, I read that so incorrectly. Awkward.

An organism's environment affects its physical and self traits by making them adapt. Charles Darwin had discovered this theory with the finches. Places that were harder to get food would make these finches physical change over evolution to help them survive. It changes the animals habits depending on their resources. If a bird eats berries but there is no berries then the bird will have to change its diet or it will die.

Answer:

Refrigeration in Food Preservation and Processing ... The aim of all food preservation methods is to slow down processes that cause deterioration of quality and wholesomeness. Refrigeration applications are equipment that transfers heat from the product or enclosure (refrigerated cabinet or room) to the colder refrigerant.

Answer:

The aim of all food preservation methods is to slow down processes that cause deterioration of quality and wholesomeness. Refrigeration applications are equipment that transfers heat from the product or enclosure (refrigerated cabinet or room) to the colder refrigerant

Explanation:

Answer:

wind causes by unequal heating of the earth

Explanation:

Because,ocean currents are driven by wind, water density differences and tides.Oceanic currents discribe the movement of water from one location to another.

Hope it helps...

Answer:

Explanation:

In addition to playing this structural role, the cytoskeleton is responsible for cell movements. These include not only the movements of entire cells, but also the internal transport of organelles and other structures (such as mitotic chromosomes) through the cytoplasm

Answer:

D)clues about the past climate of Earth

Explanation:

The fossil record certainly has gaps, mostly because the conditions required to create fossils have been rare ever since life began on Earth. A very small percentage of animals that have lived and died ever became fossils. Thus, many pieces of the puzzle are missing; some will never be found.

Answer:

The answer is B: been reduced three fold and the population is experiencing genetic drift

Explanation:

I took the exam.

Answer:

C: The frequency of b has been reduced three-fold. The population is experiencing genetic drift.

Explanation:

I just took the test

Answer:

100% will be black

Explanation:

black is a dominant trait

Answer:

chemicals

Explanation:

The nose and the tongue are two of the five sensory organs (others being skin, eyes, ears). These organs contain certain cellular structures called SENSORY RECEPTORS, which respond to different stimulus in the environment.

Nose and tongue are two organs that possess a type of sensory receptor called CHEMORECEPTORS. Chemoreceptors are receptors that respond to chemical stimuli. In other words, the receptors in the nose and tongue are stimulated by chemical substances e.g. food chemicals for TONGUE, chemicals in air for NOSE.

Answer:

B

Explanation:

It is less than 1.4 million years old

Based on the absolute dating of the rock layers in this photograph, a scientist could conclude about a fossil found in area A is that it is less than 1.4 million years old.

Fossils may be defined as the dead and organic remains of the past organisms which are preserved deep in the soil over a long period ago.

The fossil found in area A is very recent from the evolution point of view. The deeper the layer, the oldest is the fossil.

Area A of the fossil is synthesized after the time period of 1.4 million years ago, hence the fossil present in that area would be less than 1.4 million years old.

Therefore, based on the absolute dating of the rock layers in this photograph, a scientist could conclude about a fossil found in area A is that it is less than 1.4 million years old.

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Answer:

Its B

Explanation:

because the car would have to SLOW down and change velocity while it turns

Answer:

B

Explanation:

Car B will have to slow down when turning the corner.

I took the quiz! I hope this helps! :D

first left (up) trachea

first left (down) diaphragm

right (up) bronchiole

right (down) alveolus

Answer:

B - by comparing DNA from the blood cells with DNA from suspects!

Explanation:

DNA fingerprinting is a laboratory technique used to establish a link between biological evidence and a suspect in a criminal investigation.

A DNA sample taken from a crime scene is compared with a DNA sample from a suspect.

If the two DNA profiles are a match, then the evidence came from that suspect. (from www.genome.gov )

Hope this helps! :]

A forensics expert has obtained a sample of human blood from a crime scene, DNA fingerprinting may be useful by comparing DNA from the blood cells with DNA from suspects, which is option B.

DNA fingerprinting is a technique used to identify individuals based on their unique DNA profiles, and by analyzing the sequence of nucleotides in an individual's DNA, forensic scientists can create a DNA profile that is unique to that individual. So to identify the person who left the blood at the crime scene, forensic scientists would analyze the DNA in the blood sample and create a DNA profile, and then find out the criminal based on the DNA fingerprinting.

Hence, DNA fingerprinting may be useful by comparing DNA from the blood cells with DNA from suspects, which is option B.

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Answer:

A magnetic storm is a period of rapid magnetic field variation. It can last from ... When these events occur, we can experience a truly large magnetic storm

Explanation:

The event that should be resulted by the magnetic force is the needle of a compass points toward Earth's North Pole.

It is treated like the attraction or the repulsion that should occur between the particles that are electrically charged due to its motion.

It is termed as the basic force that should be held responsible for the impacts like action related to the electric motors and the iron magnets for the attraction purpose.

Therefore, the above should be the answer.

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Answer:

Chloroplasts?

Explanation:

search it up

Answer:

Vacuole <Mitochondria

Explanation:

Any infectious disease (genetic, bacterial, and viral) can be prevented by vaccinations. Therefore, option D is correct.

Vaccinations are primarily designed to stimulate the immune system and provide protection against specific pathogens that cause diseases. They work by introducing harmless components of the pathogen, such as inactivated or weakened viruses or bacteria, or their components (antigens), into the body.

This exposure allows the immune system to recognize and mount an immune response against the pathogen without causing the actual disease.

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Answer:

Both parents

Explanation:

Punnett squares will show that for each trait (eye color, hair color, hair type, etc.) there are at least 3 different options (for a 2x2 Punnett square). I've also seen 4x4 Punnett squares where two traits are used.

Explanation:

F = ma

= 4000 × 4

= 16000Joules

or 16KJ

Answer:

low level of fitness means the individuals have little or no adaptations.

while adaptations are those changes that help an organism to struggle and survive. it increases the survival rate of an organism. adaptations are the changes in DNA in the form of mutations and recombinations. it increase immunity of an organism and improve its fitness.

Explanation:

Answer: We can ignore both A and B as they are not actions at all

And C is ruled out because it isn't Marlene's action it's Tami's therefore the answer is D. D also develops Marlene's character as it shows her anxiety and her caring nature towards her cat.

Hope this helps, and please mark me brainliest! >//<

Answer:

it is D. because A. and B. are just thoughts and C. is about Tami.

Answer:

True

Explanation:

Answer: C

Explanation:

A specific DNA segment is amplified via PCR from a complicated combination of starting material, commonly referred to as template DNA, hence option C is correct.

The reaction's simplicity and the relative case of the practical manipulation procedures are what's behind it. The reaction needs some knowledge of the flanking DNA fragment's sequence in order to be amplified.

Taq polymerase is the name of the heat-tolerant bacterium from which the DNA polymerase normally used in PCR was derived (Thermus aquaticus). T. aquaticus resides in hydrothermal vents and hot springs.

The primers are used in accordance with the sample or target DNA. The procedure, which entails numerous cycles in which copies are created, likewise uses DNA and Taq polymerase.

Therefore, the three fundamental phases are "denaturation," "annealing," and "extension."

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Answer:

Explanation:

Boil a pot of water that has been tested with a stainless steel dish that sits adequately on top of the pot, without falling in. When the water boils, turn off the stove, which eliminates the ignition source, then pour your ethanol into the bowl, and place it on top of the hot water pot

Answer:

Boil a pot of water that has been tested with a stainless steel dish that sits adequately on top of the pot, without falling in. When the water boils, turn off the stove, which eliminates the ignition source, then pour your ethanol into the bowl, and place it on top of the hot water pot.

Explanation: