Juan and Carol were studying invertebrates in biology. They knew that segmented or earth worms preferred a dark, moist habitat. During this lab, they would be investigating the responses of organisms called planaria or Dugesia tigrina. These were simple flatworms that still had a one-way digestive system and a very simple nervous system. Juan and Carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. They shined a light on the dish. Next, they removed the paper and placed a small amount of chicken liver at one end of the dish. They added a few large salt crystals to the water. Finally, they added drops of hot water to the cool water in the petri dish. Their results can be seen in the data table. According to their experiment, all BUT one conclusion is valid. A) Planaria are a fresh-water organism only. B) Planaria are consumers and may be carnivores. C) Planaria have specialized cells to detect light intensity. D) Planaria have specialized cells that detect temperature change. answer and you get all my points plzzz

Answers

Answer 1

Answer:

A) Planaria are a fresh-water organism only.

Explanation:

Planaria are a fresh-water organism only. Although the planaria moved away from the salt crystals, it may be because of the concentration of salt rather than its presence. There are both fresh water and salt water species of planaria. The other three conclusions are supported by the data.

Answer 2

Planaria are consumers and may be carnivores is the correct. Thus option B is correct

What is a planaria?

Planaria  also called cross-eyed worms.

They are the tiny group of  flatworms belongs to phylum Platyhelminthes.

They are free-living organisms in fresh water bodies.

The body are small, measuring around 3 to 15 mm , have a soft, leaf-shaped body covered cilia and spade-shaped head with two eyes

It is otherwise called as flatworms under the ancient class of Turbellaria which is in the branch of Platyhelminthes.

Planaria can sense and respond different stimuli like light where e eyespots can detect light and allow the organism  to react to it.

It can sense Chemical by the help of  their head regions allow them  to smell.

The auricles of the head region can sense touch and allow  them to respond.

Thus option B is correct

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Related Questions

The text box below contains facts about salmon:
juvenile salmon migrate from freshwater streams and rivers to the ocean.
in the ocean, juvenile salmon d.r.i.n.kk. salt water.
Special cells on the salmon's gills called chloride cells help the salmon to excrete salt.

How do populations of juvenile salmon respond to changes in salinity as they migrate?
The juvenile salmon utilize special structures but do not alter their behavior.
The juvenile salmon alter their behavior and utilize special structures.
The juvenile salmon utilize special structures to alter their behavior.
The juvenile salmon alter their behavior but do not utilize special structures.

Answers

Answer:

due to the salmons body and biology the salinity doesnt matter because they can change whats around them using the salt from inside their body

Explanation:

they both utilize and alter behavior

The populations of juvenile salmon respond to changes in salinity as they migrate the juvenile salmon utilize special structures to alter their behavior. Therefore, option C is correct.

What is salinity ?

The amount of dissolved salt in a body of water is known as salinity. It makes a significant contribution to conductivity and influences many aspects of the chemistry of natural waters as well as the biological activities that take place there.

In soils and seas, primary salinity is a natural occurrence. Salt lakes, salt pans, salt marshes, and salt flats are a few examples of naturally occurring salty landscapes. Salting caused by human activity, typically land development and agriculture, is known as secondary salinity.

Salinity is the buildup of salt to a degree that harms the built environment and the ecosystem in general. While there are many areas of the Australian terrain that are naturally salty, human activity has the potential to raise salt levels. Water and salinity go hand in hand.

Thus, option C is correct.

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HELP PLS!!! (PSYCHOLOGY) I'LL GIVE YOU BRAINLIEST IF UR RIGHT!!

Nate is a teacher who has been in the dassroom for 25 years. When a new teacher is hired, he offers to be a mentor because he loves helping new teachers get inspired about working with children. He wants to help make sure that the teaching profession remains high quality. How would Erikson MOST likely describe Nate's efforts?
A.) Nate is working en generativity.
B.) Nate is working on ego integrity.
C.) Nate is working on intimacy.
D). Nate is working on acceptance​

Answers

Answer:

A.) Nate is working on generativity

Explanation:

Generativity is the ability to provide care or concern for younger or older genrations. Nate offers to be the mentor because he loves helping the new teachers get inspired about working with children. According to Erik Erikson theory of psychosocial development, generativity can refer to "making your mark" or impact on the world through creating or nurturing things that will outlast in an individual/individuals.






Answer and I will give you brainiliest

Answers

Answer:

Answer is in picture.

Explanation:

Hope it is helpful.....

Here! Copy this lol
Click image/:

Muscle tissues are made of specialized unitss called?

Answers

Answer:

Each skeletal muscle fiber consists of a bundle of myofibrils, which are bundles of protein filaments. The filaments are arranged in repeating units called sarcomeres, which are the basic functional units of skeletal muscles.

Explanation:

Answer:

skeletal muscle

Explanation:

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Which animal will use a hollowed-out tree stump as a home?
O A) a beaver
OB) a bear
OC) an eagle
OD) a rabbit

Answers

i think it would be a rabbit
B: A bear
Bears hibernate in roots, rock crevices, And hollow trees. Sometimes the den is not much larger then the bear

Which symbol represents a dominant allele?


t

Tt

T

tt

Answers

Answer:

Tt

Explanation:

Select the correct answer. Which statement is an example of a focused topic? A. Fruits from rainforests are known to heal diseases that affect people around the world. B. Fruits from rainforests are enjoyed by people all over the world. C. Fruits from rainforests are part of a healthy diet. D. Fruits from rainforests in the Amazon are effective remedies for the common cold.

Answers

Answer:

I think D

Explanation:

Answer:

D. Fruits from rainforests in the Amazon are effective remedies for the common cold.

Explanation:

list five women rights​

Answers

Women's Suffrage. ...
Sexual and Reproductive Rights. ...
Freedom of Movement. ...
Intersectional Feminism. ...
Gender Inequality. ...
Gender-Based Violence. ...
Sexual Violence and Harassment. ...
Workplace Discrimination.

In rabbits, black fur (B) is dominant to white fur (b) A purebred black furred male is bred with a female that had the recessive white fur

Answers

Answer:

BB x bb

Bb

Bb

Explanation: When a purebred dominant trait is bred with a purebred recessive trait then the offspring will always have the dominant and recessive trait.

How does the length of the axon in a relay neurone differ from the axon in both a sensory and a motor neurone

Answers

Answer:

Relay neurons are interneurons that connect brain regions and near neurons, so their axons are shorter than the ones of a motor or sensory neurons which need to be very long as they travel long distances to reach target organs

gene mutations can occur
a. exposure to chemical mutagens
b. exposure to gamma radiations

Answers

Answer:

b

Explanation:

3 This is the menstrual phase wherein pregnancy is possible.
c) menstrual phase
d) ovulation phase
a) Tollicular phase
b) luteal phase
wires a woman for pregnancy.​

Answers

Answer:

ovulation phase

Explanation:

The ovulation phase is the only time during your menstrual cycle when you can get pregnant. You can tell that you're ovulating by symptoms like these: a slight rise in basal body temperature

d) ovulation phase

Its called ovulation due to the egg leaving to ovary to then be fertilized by a sperm. Although it is possible for a woman to get pregnant during anytime in her cycle. I hope this helped a bit.

WILL GIVE BRAINLIEST.Read the passage. Seth sat at the piano, and I saw him take a deep breath. Sweat was dripping off of his brow, and his left hand was twitching slightly—the obvious result of nerves. He took another deep breath and slowly, painfully exhaled. Then, he gently placed his hands on the keys and his fingers began to move gracefully up and down the keyboard. What emerged was the most beautiful music I had ever heard. Why is this passage an observation? It tries to reflect the everyday lives of ordinary people. It describes an event the writer has witnessed. It reveals a deep truth about a character. It portrays the physical appearance of a person.

Answers

Answer:

2.

Explanation:

it describes an event the writer has witnessed

Which process BEST explains how DNA is replicated?
A)
DNA is conservative. The original strands of nucleotides do not separate. A
copy composed of two new strands containing all of the new DNA base
pairs is produced to come together.
DNA is semi-conservative. The original strands of nucleotides do not
separate. A copy composed of two new strands containing all of the new
DNA base pairs is produced to come together.
B)
DNA is semi- conservative. The original strands of nucleotides do not separate. A copy composed of two new strands containing all of the new DNA base pairs is produced to come together.
C)
DNA is semi-conservative. The two strands of nucleotides separate. It
produces two copies of the original DNA molecule, each of which contains
one of original strand, and one new strand.
D)
DNA is dispersive. The original DNA chain breaks and recombines in a
random fashion before the double helix structure unwinds and separates to
act as a template for messenger RNA synthesis.

Answers

Answer:

C)

DNA is semi-conservative. The two strands of nucleotides separate. It

produces two copies of the original DNA molecule, each of which contains

one of original strand, and one new strand.

The statement that best explains the process of replication is statement C.

What do you mean by DNA replication?

DNA replication may be defined as the process by which a molecule of DNA is duplicated, where a parental strand gets divided into two daughter strands.

DNA is semi-conservative. The two strands of nucleotides separate. It produces two copies of the original DNA molecule, each of which contains one of the original strand, and one new strand.

Therefore, the statement that best explains the process of replication is statement C.

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Match the body systems and interaction descriptions:
1. Circulatory and Respiratory
2. Digestive and Circulatory
3. Nervous, Muscular, and Skeletal
4. Circulatory and Integumentary
5. Muscular and Digestive
6. Respiratory and Muscular
7. Circulatory and Skeletal
8. Excretory and Circulatory
9. Nervous and Integumentary
10. Muscular and Circulatory

_. Nutrients pass into the circulatory system to be carried to body cells
_. Lungs supply oxygen carried by blood to cells of the body
_. Production of blood cells in bone marrow
_. Chewing, swallowing and movement of food through the digestive tract
_. Pumping of the heart & blood
_. Daily movement and coordination
_. Kidneys remove wastes from blood
_. Cooling through dilation of blood vessels near the surface of the skin
_. Sense of touch
_. Movement of the diaphragm in breathing

Answers

2. Nutrients pass into the circulatory system to be carried to body cells

1. Lungs supply oxygen carried by blood to cells of the body

7. Production of blood cells in bone marrow

5. Chewing, swallowing and movement of food through the digestive tract

6. Pumping of the heart & blood

3. Daily movement and coordination

8. Kidneys remove wastes from blood

4. Cooling through dilation of blood vessels near the surface of the skin

9. Sense of touch

10. Movement of the diaphragm in breathing

There are numerous parts to the human body. Every physical portion serves a distinct purpose.

What is body systems and their interaction?

There are numerous parts to the human body. Every physical portion serves a distinct purpose. To better comprehend how the human body's components interact with one another and work together as a whole, scientists divide the body into systems. A group of bodily parts that cooperate to carry out a specific task is known as a body system.

For instance, the integumentary system, that shields the body from its surroundings, is made up of the skin, hair, and nails. Another instance of an organ that guards the body is the immune system.

1. Lungs supply oxygen carried by blood to cells of the body

2. Nutrients pass into the circulatory system to be carried to body cells

3. Daily movement and coordination

4. Cooling through dilation of blood vessels near the surface of the skin

5. Chewing, swallowing and movement of food through the digestive tract

6. Pumping of the heart & blood

7. Production of blood cells in bone marrow

8. Kidneys remove wastes from blood

9. Sense of touch

10. Movement of the diaphragm in breathing

Therefore, there are numerous parts to the human body. Every physical portion serves a distinct purpose.

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Provide an explanation for why the indigo dye did not adhere to the different fibers in your test fabric. You will need to do a little bit of outside research on what chemicals make up some of the fibers. You may also need to do some research on intermolecular forces and why some interactions are stronger than others. Please make your explanation at least 500 words in two or more paragraphs. At least one in-text citation is required along with a list of your source(s) in your preferred citation style (MLA, APA, ACS, Chicago Style, etc.).

Answers

Answer:

Due to lack of bonds.

Explanation:

The indigo dye did not adhere to the different fibers because the indigo dye did not make bonds with the fiber, it only attached to it physically for temporary period of time. The reduced state is also necessary for indigo because indigo cannot dissolve in water, but when it is reduced it can soluble and able to get inside a fiber to make physical bond with the fiber. Some interactions are stronger than others because of the presence of strong bond between the two different materials so strong bonding makes the materials to attach with each other for a long period of time or permanently.

I NEED HELP ON BOTH ANSWER AS QUICKLY AS POSSIBLE!!
Bc

Answers

Answer:

What do you need help with?

Figure out which step in the scientific method is being used.
"If eating celery burns more calories than the celery contains, then I will lose weight if I eat lots of celery."

Answers

Answer:

Hypothesis

Explanation:

It uses an if then system, which is commonly used when creating hypothesises.

What do you observe about the structure
of the white blood cell? How do you think
this is related to its function of trapping
pathogens in the body?
Please help I’ll give brainlyiest

Answers

Answer:

White blood cells engulf and digest pathogens and any other unknown material in the blood and tissues. They engulf the pathogen into a vesicle called a phagosome. This fuses with a lysosome and the enzymes break down the pathogen.

White blood cells foremostly recognize any pathogen or foreign substance in the body and then engulf it with the help of receptors like Toll-like receptors. Finally, the killing of antigen takes place by phagocytosis.

What do you mean by Pathogens?

Pathogens may be defined as any microorganisms which are capable of inducing diseases in other living organisms.

After engulfing, the antigen is packed under a vesicle known as a phagosome. This phagosome is then treated with lysosomes to form a structure known as phagolysosomes.

Thes phagolysosomes are responsible for the breakdown of antigen, which is then presented by MHC molecules to perform perforin-granzyme mediated killing of antigen.

Therefore, it is well described above.

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Codons are found on
while anticodons are found on
mRNA, RNA
DNA, mRNA
mRNA, DNA
tRNA, mRNA

Answers

Answer:

Anticodons are found in tRANA

Codons are found in RNA

Can I get brainliest?

The number of different species in an area is called species diversity or _________.

Please help, I'll give brainlist...​

Answers

Answer:

Explanation:

biodiversidad

Please Help!!!
How many ATP can be obtained from the complete beta-oxidation and metabolism of one 16-carbon fatty acid molecule?​

Answers

Answer:

read ex

Explanation:

129 ATP

Platinum is a catalyst humans use in fuel cell. Although for green energy humans use some bacteria that releases enzymes such as hydrogenase to perform functions as platinum in fuel cell. This is an example of
a. Biofilm
b. Biosensing
c. Biomimicry

Answers

Answer:

B

Explanation:

90% of people marry there 7th grade love. since u have read this, u will be told good news tonight. if u don't pass this on nine comments your worst week starts now this isn't fake. apparently if u copy and paste this on ten comments in the next ten minutes you will have the best day of your life tomorrow. you will either get kissed or asked out in the next 53 minutes someone will say i love u

Which of the following best explains why the biosphere is a key component of the Earth’s systems?
a.
The biosphere is a key component of the Earth’s systems because it is a common concept to many disciplines in science.
b.
The biosphere is a key component of the Earth’s systems because the seasonal cycles directly affect primary productivity.
c.
The biosphere is a key component of the Earth’s systems because it helps drive the other systems by interacting with and exchanging matter and energy with the other spheres.
d.
The biosphere is a key component of the Earth’s systems because it has evolved to create the chemical composition of the planet we know today.


Please select the best answer from the choices provided

A
B
C
D

Answers

B, The biosphere is a key component of the Earths system.

Answer:

c. The biosphere is a key component of the Earth’s systems because it helps drive the other systems by interacting with and exchanging matter and energy with the other spheres.

Explanation:

The modern cell theory doesn't say

A all living things are multicellular

B cells are the smallest living unit in all organisms

C all cells come from other cells

D all living things are made of cells

Answers

Answer:

A

Explanation:

Modern cell theory states: cells are the basic unit of structure and function for all living things, all cells come from preexisting cells, and all living things are made from cells. It does not state that all living things are multicellular, in fact there are plenty of unicellular organisms. Therefore the answer is A.

In _______, _____________ ___________, looked at a piece of cork under his
microscope and called what he saw cells.

Answers

Answer:

1665

Robert hooke

Answer:

In 1665, Robert Hooke looked at a piece of cork under his

microscope and called what he saw cells.

Explanation:

Robert Hooke performed several experiments on the work of the cell theory and overall was the first scientist to discover them and coin the name of cells.

Hope that this helped out! (●´ω`●)

Explain why it is always necessary to de-starch a plant​

Answers

Because of the soil sediments

What’s the use of short tandem repeat?

Answers

Answer: Ok So A short tandem repeat is a microsatellite with repeat units that are 2 to 7 base pairs in length, with the number of repeats varying among individuals, making STRs effective for human identification purposes.STRs are extremely useful in applications such as the construction of genetic maps (49), gene location, genetic linkage analysis, identification of individuals, paternity testing, as well as disease diagnosis 50., 51.. STR analysis has also been employed in population genetics.

Hope this helps have a awesome night/day❤️✨

Explanation:

Water lilies float on the surface of ponds. They grow in shallow ponds, so the roots of the plant can grow down into the mud at the bottom of the pond. Water lilies need about 4–6 hours of sunlight each day, and grow best in tropical areas.

Which statement best explains why water lilies cannot survive in the marine biome?
A.
The marine biome has an average yearly rainfall that is too high.
B.
The water in the marine biome is salt water rather than fresh water.
C.
The water in the marine biome is fresh water rather than salt water.
D.
The marine biome has an average yearly rainfall that is too low

Answers

Answer:

B

Explanation:

A is false

C is false

D is false

When California recently (June 2015) passed a law banning the personal belief exemption of routine childhood vaccines Jim Carrey recently posted (June/July 2015) a series of tweets about thimerosal (a form of mercury) used as a preservative in vaccines. Is it true that there is no convincing scientific evidence that thimerosal causes harm by the low doses of thimerosal in vaccines, except for minor reactions like redness and swelling at the injection site?

Answers

Answer:

Yes, there is no convincing scientific evidence that thimerosal causes harm by the low doses of thimerosal in vaccines, except for minor reactions like redness and swelling at the injection site

Explanation:

Thimerosal has been used safely as a vaccine additive, added to some vaccines to prevent germs like bacteria and fungi from growing in them dated since early 1930s. Though, Thimerosal contains mercury but the type of mercury doesn’t stays in the body, and is unlikely to make human fall sick.

Most people doesn't have any allergic reaction to it except for redness and swelling at the injection site as early mentioned and this is considered irrelevant when compared to effect of vaccine when contaminated by germ which could cause serious illness or death.

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