Is it True or false?

Is It True Or False?

Answers

Answer 1
False, plant cells have cell walls while animal cells do not. Both however, have cell membranes.

Related Questions

the words ""antigen"" and ""virus"" are interchangeable.

Answers

Answer:

False

Explanation:

A virus (which is a pathogen) has a lot of antigens on its surface, so they can't be used interchangeably.

Which of the following statements is false?

*Pressure on the sciatic nerve causes carpal tunnel.
The "funny bone" is really a nerve.
All spinal nerves are mixed nerves.
A dermatome can be formed by a spinal nerve or cranial nerve.

Answers

Answer:

a. Pressure on the sciatic nerve causes carpal tunnel.

Explanation: is the correct answer that is the false statement

Which of the following processes does not contribute to carbon cycling?
A. Condensation
B. Photosynthesis
C. Combustion
D. Respiration

Answers

Answer:

A. Condensation

Explanation:

Condensation is the process that does not contribute to carbon cycling. It is the process by which water vapor in the air is changed into liquid water.

Answer:

A. condensation

Explanation:

#carry on learning

Which one of the following tissues is illustrated by the sketch?
A. xylem C. Collenchyma
B. Parenchyma D. Epidermis

Answers

The answer is b) parenchyma D. Epidermis

what evidence can be cited from the fossils to reconstruct climate change over time?

Answers

Answer: When studying the museum’s collection of plant fossils for information about the climate, Wing and Barclay start with plant leaves.

Roughly 56 million years ago, during a time called the Paleocene Eocene Thermal Maximum (PETM), Earth’s average temperature rose four to eight degrees Celsius in less than 10,000 years. The cause was geologic processes releasing trillions of tons of carbon dioxide into the atmosphere. The dramatic shift in global climate forced massive upheaval in ecosystems around the world.

“It’s the best analogue for the climate change we’re experiencing today,” Barclay said.

Fossil plants and their leaves from the PETM show that ecosystems shifted massively because of the rapid increase in global temperature. But global warming during the PETM did not come from humans. So, scientists today are working on ways to extrapolate information from that period and apply it to the even faster and more drastic events of today.

_________ is the study of the means by which living organisms both obtain and utilize the nutrients they need to grow and sustain life.

Answers

The answer is Nutrition

Which of the following choices best describes ‘ovulation?'
A. An egg is released from the ovary.
B. An embryo sinks into the uterus lining.
C. The sperm and egg nuclei fuse.
D. The ejection of sperm through the penis.

Answers

Answer:

An egg is released from the ovary

Ovulation is a crucial process in the female reproductive system, occurring as a part of the menstrual cycle. It involves the release of a mature egg (ovum) from one of the ovaries. The correct option is A. An egg is released from the ovary.

1. **Menstrual Cycle**: The menstrual cycle is the regular hormonal cycle that occurs in women of reproductive age. It typically lasts around 28 days, although the length can vary from woman to woman. The cycle is divided into different phases, with ovulation occurring during one specific phase.

2. **Follicular Phase**: The menstrual cycle begins with the follicular phase, where hormones, primarily follicle-stimulating hormone (FSH) and luteinizing hormone (LH), are released by the pituitary gland. These hormones stimulate the growth and maturation of follicles in the ovaries.

3. **Ovarian Follicles**: Within the ovaries, multiple tiny sacs called ovarian follicles contain immature eggs. Each month, one of these follicles becomes dominant and continues to grow while others degenerate.

4. **Mature Follicle Development**: As the dominant follicle grows, it secretes estrogen, a hormone that prepares the uterus for a potential pregnancy. The rising estrogen levels also trigger a surge in luteinizing hormone (LH) around the middle of the menstrual cycle.

5. **Ovulation**: The LH surge triggers the final stage of ovulation. It causes the mature follicle to rupture and release the mature egg from the ovary. The egg is swept into the fallopian tube by tiny hair-like structures called cilia.

6. **Fertilization**: The released egg remains viable for about 12-24 hours. If sexual intercourse occurs during this time and sperm are present in the fallopian tube, fertilization may occur. Fertilization is the process where the sperm penetrates the egg, resulting in the formation of a zygote (fertilized egg).

7. **Implantation or Menstruation**: If the egg is not fertilized, it will eventually disintegrate, and hormone levels will drop. This leads to the shedding of the uterine lining, causing menstruation to occur. On the other hand, if fertilization occurs, the resulting zygote will undergo several divisions and travel down the fallopian tube to the uterus, where it may implant into the uterine lining and develop into a pregnancy.

Ovulation is a crucial event in the female reproductive cycle, marking the release of a potential egg for fertilization. It is a key factor in determining fertility and the ability to conceive a child.

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which enzyme catalyzes the elongation of a dna strand

Answers

DNA polymerase
Elongation. During elongation, an enzyme called DNA polymerase adds DNA nucleotides to the 3′ end of the newly synthesized polynucleotide strand.

How do the oxygen (O2) and carbon dioxide (CO2) levels change over time?
What is always true about the total amount of O2 and CO2 in the test tube?
What happens when the CO2 reaches zero?

Answers

Answer:

Over a vast amount of time, millions of years, the earth gradually cooled. When the temperature dropped enough, water vapor condensed and went from a gas to liquid form. This created clouds. From these clouds, the oceans formed and the oceans absorbed a lot of the carbon dioxide in the atmosphere.

Explanation:

what is the primary function of the chlorophyll pigment?

Answers

Answer:

to absorb light—usually sunlight.

Explanation:

Chlorophyll's job in a plant is to absorb light—usually sunlight. The energy absorbed from light is transferred to two kinds of energy-storing molecules. Through photosynthesis, the plant uses the stored energy to convert carbon dioxide (absorbed from the air) and water into glucose, a type of sugar.

Does “survival of the fittest apply to domesticated animals? Why or why not? *

Answers

Answer:

Yes.

Explanation:

This survival of the fittest is instinct helps domestic animals live. Just because an animal is domesticated, does not mean that instincts go away. Those instincts like hunting may get suppressed, but not taking away.

Answer:

Survival of the fittest does not apply to domesticated animals. This is because these animals don't live in the wild so they don't have to run after things and kill them. Their food comes out of a tin and is provided by human beings. They don't have any predators so their lives are seldom at risk. Thus, they don't need to be fitter or more powerful than other animals in any way.

Lets take the example of pet dogs. We keep them for our support or simply because we enjoy their company. We provide them with food, shelter etc. and protect them. Since, we basically do everything for them; they need not evolve into a stronger, more powerful species.

However, in the case of stray dogs, they have to fight for their survival. They have to fight with other dogs for food and shelter. Hence, survival of the fittest will apply here as the strongest dog gets to eat.

Hope this helps.

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How much atp is produced in cellular respiration.

Answers

Biology textbooks often state that 38 ATP molecules can be made per oxidized glucose molecule during cellular respiration (2 from glycolysis, 2 from the Krebs cycle, and about 34 from the electron transport system).

If enzyme 2 is denatured (destroyed) the levels of which substance will increase.

Answers

Answer:

Higher temperatures disrupt the shape of the active site, which will reduce its activity, or prevent it from working. The enzyme will have been denatured .

hope it helps :D

When a star becomes a red giant it will
1.shrink
2.shrink and cool
3.shine hotter
4.expand and cool

Answers

Stars spend approximately from a few thousand up to 1 billion years as a red giant. The helium in the core eventually runs out and the fusion process stops. The star then shrinks until a new helium shell reaches its core.

Therefor the answer is 2.shrink and cool

I hope this helps!

Answer:

Shrink an cool I took the test

what do you understand by the term reproductionwhat do you understand by the term reproduction

Answers

Answer:

Reproduction is the manufacturing of offspring. There are  primary forms: sexual and asexual reproduction. In sexual reproduction, an organism combines the genetic statistics from each of its mother and father and is genetically unique. In asexual reproduction, one parent copies itself to shape a genetically same offspring.

Explanation:

Make sure to rewrite it in your own words, don't get caught cheating (for those who are.)

Complete this sentence. The increased ________ in ocean waters has decreased its pH, making it more acidic.
nitrogen
carbon
salt
heat

Answers

Answer:

Carbon?

Explanation:

I remember that carbon can be toxic if it's increased

Answer:

carbon

Explanation:

A woman who has had five preganacies tests positive for HIV by Western blot. What is the most likely reason for this result

Answers

Explanation:

Multiparous women often have HLA antibodies. The Western blot antigens are derived from HIV grown in human cell lines having HLA antigens. A cross reaction with HLA antigen(s) in the Western blot could have occurred.

Plant cells that give rise to two cells, one of which is free to differentiate into various kinds of cells that contribute to the plant body, are called

Answers

Answer:

meristematic cells

Explanation:

What is the function of parenchyma cells?

Answers

Answer:

help in storage and support

Which of the following characteristics do homologous chromosomes exhibit?.

Answers

Homologous chromosomes carry alleles of the same traits and therefore, carry the genetic information for the same trait.

Homologous chromosomes are a pair of chromosomes with the same gene sequence but of different origins - one paternal and the other maternal.

Thus, homologous chromosomes carry the same traits, although could be of different forms. For example, one of the chromosomes might carry a gene for tallness while the other might carry a gene for shortness even though both tallness/shortness represent a gene for height.

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In experiments with competitive barnacle species distributed along upper and lower intertidal zones, researchers found a trade-off between ability to _____ and ability to _____.

Answers

In this case, researchers observed a trade-off between the ability to tolerate harsh dry conditions and the ability to colonize deeper water. This type of trade-off can increase the fitness of only one phenotypic trait.

An evolutionary trade-off can be defined as an evolutionary mechanism where a trait can increase its adaptive fitness in the detriment of decreased adaptive fitness in another phenotypic trait.

In trade-offs, the evolutionary adaptive processes cannot optimize a given trait without compromising another.

A well-known example of an evolutionary trade-off is the balance between the number of eggs that a bird can produce in a determined clutch.

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12. A primate's ability to hold objects in its hands/feet is an evolutionary development that allowed it to
A. walk upright B. use simple tools C. gather food D.create elaborate social systems

Answers

Answer:

Its B I took the test

Explanation:

This is the start of a muscle and is the non moving end.

Answers

Answer:

What questions should you ask when analyzing how a character develops a theme? Check all that apply.

How does the character react to conflict?

How is the character changed by conflict?

When does the climax occur in a play?

Is the theme relatable to people around the world?

What lessons does the character learn based on the resolution of the conflict?

Explanation:

What questions should you ask when analyzing how a character develops a theme? Check all that apply.

How does the character react to conflict?

How is the character changed by conflict?

When does the climax occur in a play?

Is the theme relatable to people around the world?

What lessons does the character learn based on the resolution of the conflict?

The moveable end of the muscle that attaches to the bone being pulled is called the muscle's insertion, and the end of the muscle attached to a fixed (stabilized) bone is called the origin.

The mitochondria are defective and do not produce sufficient protein to synthesize microtubules in the cilia and flagella.

Answers

Answer:

The mitochondria are defective and do not produce sufficient protein to synthesize microtubules in the cilia and flagella. The plasma membrane of the alveoli is not permeable to carbon dioxide during respiration because it is too hydrophobic. The cells do not produce functional motor proteins in flagella and cilia.

What is a possible pH of acid rain?
07.0
6.9
04.3
10.5

Answers

4.3 because when it comes in contact with sulfur dioxide or nitrogen oxide it makes it more acidic and the normal ph of rain is between 5.0 and 5.5.

which macromolecule provides the building blocks for recovery and repair in forming new muscle?

Answers

Proteins provides the building blocks for recovery and repair in forming new muscle

What will most likely happen if a sound wave moves from the air through a solid?

It will increase in frequency.
It will decrease in speed.
It will increase in speed.
It will decrease in wavelength.

Answers

Answer:

C

Explanation:

It will increase in speed.

Hopes this helps you.

The speed of sound waves will increase from air through a solid.

What is effect of medium on wave speed?

The speed of a wave increases with increase in density of a medium.

Sound waves travel fastest in solids and slowest on gases.

Therefore, the speed of sound will increase on moving from air to a solid.

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What is the function of the following organelles?

Nucleus
Cell membrane
Plasma membrane
Mitochondria
Vacuole
Endoplasmic reticulum
Cell wall
Chloroplasts
Ribosomes
Cytoplasm


Are the following organelles found in plant cells, animal cells, or both?

Nucleus
Cell membrane
Plasma membrane
Mitochondria
Vacuole
Endoplasmic reticulum
Cell wall
Chloroplasts
Ribosomes
Cytoplasm

Answers

Answer:

Explanation:

The nucleus controls and regulates the activities of the cell (e.g., growth and metabolism) and carries the genes, structures that contain the hereditary information

The the cell membrane, provides protection for a cell. It also provides a fixed environment inside the cell, and that membrane has several different functions.

The plasma membrane is the same as a cell membrane

Mitochondria are membrane-bound cell organelles (mitochondrion, singular) that generate most of the chemical energy needed to power the cell's biochemical reactions. Chemical energy produced by the mitochondria is stored in a small molecule called adenosine triphosphate

​Vacuole. A vacuole is a membrane-bound cell organelle. In animal cells, vacuoles are generally small and help sequester waste products. In plant cells, vacuoles help maintain water balance.

The endoplasmic reticulum can either be smooth or rough, and in general its function is to produce proteins for the rest of the cell to function. The rough endoplasmic reticulum has on it ribosomes, which are small, round organelles whose function it is to make those proteins.

The cell wall surrounds the plasma membrane of plant cells and provides tensile strength and protection against mechanical and osmotic stress. It also allows cells to develop turgor pressure, which is the pressure of the cell contents against the cell wall.

In particular, organelles called chloroplasts allow plants to capture the energy of the Sun in energy-rich molecules; cell walls allow plants to have rigid structures as varied as wood trunks and supple leaves; and vacuoles allow plant cells to change size.

A ribosome is a cellular particle made of RNA and protein that serves as the site for protein synthesis in the cell. The ribosome reads the sequence of the messenger RNA (mRNA) and, using the genetic code, translates the sequence of RNA bases into a sequence of amino acids.

The cytoplasm is the gel-like fluid inside the cell. It is the medium for chemical reaction. It provides a platform upon which other organelles can operate within the cell. All of the functions for cell expansion, growth and replication are carried out in the cytoplasm of a cell.

lab report interdependence of organisms. plz someone tell me the project i need everything not just the data

Answers

Answer:

Introduction Purpose: Explore the interdependence of organisms by  

performing an experiment with lima bean plants and earthworms. Question: How can the presence of one species benefit another in  

the same ecosystem?  

Hypothesis: If plants grow in soil containing worms, then the  

plant growth will be greater, because worms help decompose organic matter and distribute it through the soil in a form that plants can use.

Explanation:

At each step of the food chain, how much energy is used by the organism and how much is stored in their tissues?

Answers

90% of the energy is used up between levels, and the remaining 10% stays in the tissues to be passed on.
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