what are cells surrounded and protected by?

Answers

Answer 1

Answer:

cells are surrounded by a structure called the cell membrane — which, much like the walls of a house, serves as a clear boundary between the cell's internal and external environments. The cell membrane is sometimes also referred to as the plasma membrane.

Answer 2

Answer:

The plasma membrane, or cell membrane

Explanation:


Related Questions

HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP



Answers

I think it is B but I am not so sure

The diagram below summarizes an important process.
Mpho
Which process does the diagram summarize?
Interphase
O A. The Calvin cycle
B. Meiosis
O C. Mitosis
O D. The cell cycle

Answers

Can’t see a diagram.

Answer:

The cell cycle

Explanation:

de que sustancia esta lleno el cromosoma

Answers

Answer:

Los cromosomas están compuestos por dos cadenas largas de polinucleótidos asociados a proteínas histonas

Explanation:

Un cromosoma es una molécula lineal de ácido desoxirribonucleico (ADN) la cual está compuesta por dos cadenas de nucleótidos dispuestas en forma de doble-hélice. En el ADN, cada nucleótido está formado por una azúcar desoxirribosa, un grupo fosfato y un tipo de base nitrogenada (los cuatro tipos de bases nitrogenadas que forma nucleótidos en la molécula de ADN son Timina, Guanina, Citocina y Adenina). La molécula larga de ADN en doble hélice se encuentra asociada a proteínas histonas para formar las fibras de cromatina. Aproximadamente 150 pares de bases de la molécula del ADN se encuentran enrolladas con las histonas H2A, H2B, H3 y H4 (dos subunidades de cada una) para formar un nucleosoma, la unidad básica de la cromatina. Finalmente, es importante indicar que la molécula de ADN contiene regiones no codificantes y regiones codificantes, es decir, fragmentos de ADN los cuales son utilizados como templados para producir moléculas de ARN mediante un mecanismo conocido como transcripción. Los ARN mensajeros (ARNm) son un tipo especial de ARN sintetizados a partir de fragmentos codificantes de ADN conocidos como 'genes'.  Posteriormente al proceso de transcripción, estos ARN mensajeros sirven a su vez como templados para la síntesis de proteínas en los ribosomas, mediante un mecanismo conocido como 'traducción'.

What is a difference between endocrine and exocrine glands?

A.
Endocrine glands secrete hormones into the bloodstream and exocrine glands secrete products into ducts.
B.
Endocrine glands produce nutrients for cells and exocrine glands absorb minerals for cells.
C.
Endocrine glands secrete products into ducts and exocrine glands secrete hormones into the bloodstream.
D.
Endocrine glands absorb minerals for cells and exocrine glands produce nutrients for cells.

Answers

Looks like the answer is A!

Answer:

the answer is ️

endocrine gland secretion hormones

exocrine gland secretion product into ducts like sweat gland, mammary gland, salivary gland

Human sperm and egg cells have ____ chromosomes.
A. 42

B. 21

C. 23

Answers

Answer:

They each have 23 chromosomes

Explanation:

Answer:

C. 23

Explanation:

Human sperm and egg cells have 23 chromosomes.

State two similarities and two differences between an
amoeba and a plant cell:

Answers

Answer:

S: Both are eukaryotic (1) and contain a cytoplasm + vacuole (2).

D: Amoebas lack a cell wall (1) and are not photosynthetic organisms (2).

Explanation:

Which of the following is a FALSE statement about fungi?
A. Fungi may be multicellular or unicellular

B. Fungi are heterotrophs

C. Fungi have a cell wall made of chitin

D. Fungi are autotrophs

Answers

D

fungi are not autotrophic as they lack chloroplast

Answer:

D. Fungi are autotrophs

Explanation:

Fungi are autotrophs is a false statement about fungi. Fungi are heterotrophs.

What is the name of one convection cell that forms because of the Coriolis effect? How does the air move in that convection cell?

Answers

Answer:

Hadley CellsWarming air causes it to ascend. The cool air will sink. The action eventually results in a convection cell, with air rising, traveling to the side, dropping, and returning. This heat-driven air movement circulates heat throughout the atmosphere.

OAmalOHopeO

Which two substances are among the four major types of organic compounds made by living things?
A:Carbohydrates
B:Potassium
C:Water
D:Proteins

Answers

Carbohydrates and proteins

What is the biology behind the improvement of strength in the human body? describe

Answers

Answer:

Due to its function to fight against disease.

Explanation:

Improvement of strength in the human body is very important because strong body helps in fighting against diseases. Strong body helps in doing physical activities and also helps in protecting itself from every type of harm. Weak human body can't fight against diseases due to weak immune system so we can conclude that improvement in human body is necessary for survival, development and health of human.

]
Enzymes can speed up chemical reactions because they can absorb excess energy.
True
False

Answers

Answer:false

Explanation:

Mark Brainliest please

Answer is False

The single most important property of enzymes is the ability to increase the rate chemical reactions occurring in living organisms, a property known as catalytic activity. Enzymes speed up the rate of reactions because they lower energy required to get to the transition state of the reaction.

List Name two material resources and give an
example of how each is used.

Answers

Answer:

Wood : used for building tables and chairs, and sometimes houses

Plastic: used in a way wheir we put drinking water in it, or grocceries.

Explanation:

Hope this helps!!!

Answer:

sand and cotton. Sand is a raw material that is used in making a clear window glass.  such as socks and shirts, are made from cotton.

hope it helps

Which is the path of sperm from the testes to the urethra?

Answers

Answer:

Sperm then travels through the deferent duct through up the spermatic cord into the pelvic cavity, over the ureter to the prostate behind the bladder. Here, the vas deferens joins with the seminal vesicle to form the ejaculatory duct, which passes through the prostate and empties into the urethra

Answer:

epididymis, vas deferens, seminal vesicles , prostate gland, urethra

Would you predict more earthquakes in areas where tectonic plates are colliding or where they are moving apart?
PLSS HELPP MEEE

Answers

Answer:

Maybe where they are colliding because when they collide there is going to be a wave of impact that will go to the surface

Explanation:

In fruit flies, red eye color (R) is
dominant over brown eye color(r).
What percentage of offspring would be
expected to have brown eyes if parent
one is Rr and parent two is rr?

Answers

Answer:

50%

Explanation:

¿POR QUÉ ES TAN IMPORTANTE PARA LAS ESPECIES EL OLFATO?

Answers

El olfato es vital para la supervivencia de la mayoría de humanos y animales, ya que les permite rastrear alimentos y agua, encontrar pareja e incluso comunicarse.

Explanation:

una pregunta porque puedes hablar español si esto es de ingles este Braylin

Which of the following is NOT a characteristic of life?If you explain too I give you a brainlist.
A.Made of one or more cells
B.Movement
C.Requires Energy
D.Adapts over time

Answers

B. Movement because not all living things are able to move.
I suppose it’s B, although technically all organisms have some type of physical movement, even plants. That being said the others are absolutely necessary for life so I’d imagine your teacher means walking, swimming, running, etc for movement.

The only organisms (if you call them that) that don’t have cells are viruses, which an argument still continues on whether they are alive or not.

All cellular processes require energy therefore all life requires energy.

All organisms go through adaptations given a long enough period.

PLS ANSWER NOWWWWWWWWWWWWWWWWW

Answers

Sunlight - 9th down > Needed to chemically change water...

Population - 10th down > More than one organism of the same species...

Community - 3rd down > Different populations in a specific area...

Trophic Pyramid - 4th down > Shows the energy transfers of populations...

Food Web - 6th down > Shows the feeding relationships of the food chains...

Decomposer - 8th down > Helps dead things to chemically change...

What are three real life examples of diffusion and the Cells ? ​

Answers

Answer:

living organisms

Oxygen and carbon dioxide, dissolved in water, are exchanged by diffusion in the lungs:

hope it helps

Elizabeth has always believed that people’s thoughts can help heal them. She wants to help people use positive thinking to positively affect their illnesses. What type of psychology would be MOST appropriate for Elizabeth to study? A. human factors psychology B. industrial psychology C. health psychology D. sports psychology

Answers

Answer:

health psychology

hope it is helpful to you

What do you notice about the speed of electrons through the short circuit?

Answers

No picture, no observation = no way to answer this.

prairie dogs north america Indirect relationship (between keystone species and other organisms): Preservation Status:

Answers

Answer:

Indirect relationship.

Explanation:

There is indirect relationship between keystone species and other organisms because both species affect each other not directly but indirectly. The keystone predation was the most common of the indirect effects on other abundance of other species. The predation of keystone species decrease the population of keystone species which indirectly increases the population of competitors in that environment.

Based on what you know about the relationship between the burning of fossil fuels (coal, oil, gasoline) and CO2, how could this also contribute to the cyclic nature of CO2 concentrations throughout the year?

Answers

Explanation:

levels of the carbon dioxide in the atmosphere rise and fall each year as plants through photosynthesis and respiration take up the gad in the spring and summer and release it in fall and winter. Now the range of that cycle is expanding as mire carbon dioxide is emitted from burning fossil fuels and other human activities

*Hope this Helps*

help me ls 20 points !!! i will mark brainliest just someone help me quick

Answers

Answer:

Mutations and sexual reproduction is the right answer

Hope it helps:)

Please mark me the brainliest if you won't mind:)

Which hormone is involved in female puberty, pregnancy, and menopause?

Answers

Estrogen is involved in all three.
Estrogen plays a big role in reproductive and sexual development, including:
puberty
menstruation
pregnancy
menopause

How does connective tissue provide support the body?

Answers

Answer:

Connective tissues perform many functions in the body, but most importantly, they support and connect other tissues; from the connective tissue sheath that surrounds muscle cells, to the tendons that attach muscles to bones, and to the skeleton that supports the positions of the body.

Explanation:

Which process is similar to binary fission?Which stage of the cell cycle involves cell growth and DNA replication?

Answers

Answer:

mitosis

Explanation:

i took the test and got it right :) hope this helped

PLEASE HELP! WILL MARK BRANLIEST!
The amount of carbon today is the exact amount that has always been on Earth. T or F

Answers

Answer:

False

Explanation:

Every time, the amount of carbon increases depending on the population that has grown on our planet. Carbon is a chemical substance that is created by human activities which are wood, coal, natural gas, gasoline, and oil, If it is burned, Carbon dioxide is released and mixing it in the air and continuously adds for as long as they keep doing it.

Thank you! ^^

I NEED HELP ASAP
click on the picture to help

Answers

Answer: 1- Central nervous system, thalamus.

2- Because the hypothalamus is part of an unit called Hypothalamus - adeno/neuro hypophysis, that unit synthesizes hormones.  

3- Through different cores like supraoptic, paraventricular, etc.

4- Specific hormones (polypeptides, proteins, derived from amino acids, steroids). Those hormones travel in arterias or veins to the diana organs.

5- pituitary gland/ hypophysis

Explanation: -

Energy from food must be transformed into the bonds of
before it can be used by cells
A)
ATP
B)
GNC
NADP
D)
cellulose

Answers

The answer is ATP. ATP is the universal energy for all chemical reactions.glad to be of assistance
Other Questions
" Ethics" are best defined as. Help me please The question is in the picture above.. (5x-3)=(3x+27) I dont understand Nunca _ a Irlanda.Hemos ViajadoViajaramosEstamos ViajandoViajado Math help please urgent PLEASE HELP ME, THANK YOU!!EXPLAIN YOUR ANSWER FOR BRAINLIEST A prism with an volume of 148 cubic cm is dilated by a factor of 5.5.The volume of the dilated prism is ___ cubic cm.(this is just a word question) Exam Lesson Name: Introduction to Design TechnologyExam number. 700796RR> Exam GuidelinesExam InstructionsQuestion 8 of 20 :Select the best answer for the question8. Cycling through the design process to create several models that incrementally improve a solution is called what?O A. Six SigmaB. Success criteriaC. Just-in-time productionD. Iterative designMark for review (Will be highlighted on the review page)Type here to searchOBiS Determine the horsepower required to compress 1 lbm/min of ethylene oxide from 70 oF and 1 atm to 250 psia. The compressor has an efficiency of 75%. The molar heat capacity of ethylene oxide is given by Cp 5. A celebrated photographer who chronicled the hardship of the Great Depression was Determine: minimum, maximum, median, 1st quartile, and 3rd quartile10, 12, 7, 9, 4, 15, 20, 21 Please helpp I will mark brainliest!! Consider the systems of equations:y=4/5 x3y=4/5 x+1Without graphing, determine and explain how many solutions you would expect this system of equations to have. 37 + (-37) im looking for the answer En cul de las apariciones de la Virgen en Ftima pidi ella la devocin de los cinco primeros sbados consecutivos? how would both the Dutch and the Native benefit from the sale and purchase of land in Manhattan? 26.Which one of the following is not a vector quantity?(2)A) accelerationC) displacementE) instantaneous velocityB) average speedD) average velocity Excessive use of artificial opiates, such as morphine, can cause the brain to shutdown its production of *(BRAINLIEST TO THE WISE ONE WHO GETS THIS CORRECT!)*The intense feeling of sorrow associated with loss is called _____. A. contentment B. loss C. grief D. entitlement A force of 20 N acted on a 5 kg object, moving it a distance of 4 m. How much work was done on the object? The ratios a: B and B :c are equivalent to one anotherSelect all the statements that must be true