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xz_007 [3.2K]
3 years ago
14

Cells can regulate what they need or don't need to maintain their own health. True False

Biology
1 answer:
Yakvenalex [24]3 years ago
6 0
True. This is called cellular homeostasis. This happens when cells are able to produce and excrete materials within their environment to regulate processes like cellular respiration, phagocytosis, and pinocytosis. If cells are not able to do this, mutations and excessive cellular division may occur causing abnormalities in specific organisms.
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Hi! I am confused on how to do Q2. Anyone doing A-levels can solve that questions and explain? Thanks! <3
riadik2000 [5.3K]

Answer:

i) Glucose

ii) β(1-4) glycosidic bonds.

iii) Oxygen

Explanation:

Cellulose is an important structural carbohydrate found in plants. It forms a major component of the plant cell wall.

Cellulose is a polysaccharide formed by monomers of glucose.  These glucose monomers are joined together by covalent bonds called β(1-4) glycosidic bonds, which means that the 1st carbon of one glucose is bound to the 4th carbon of the next glucose. To make this arrangement,  every other glucose molecule in cellulose is inverted, which you can see in the diagram.

Glucose monomers contain carbon, hydrogen, and oxygen only. If you look at the pattern of the molecule (remembering every second glucose is inverted), you can see that Z must be O.

The functional group denoted by Z is oxygen. The OH groups on the glucose from one cellulose chain form hydrogen bonds with oxygen atoms on the same or on another chain, holding the chains firmly together and forming very strong molecules - giving cellulose its strength.

4 0
3 years ago
Which compartments make up the cardiovascular system
Ronch [10]
I'm not sure what you mean by "compartments", but the cardiovascular system consists of the heart, blood vessels, and approximately 5 liters of blood.
4 0
3 years ago
What happen to the brain and the brain cavity?
Gnoma [55]

Answer: OK so The ventricles of the brain are a communicating network of cavities filled with cerebrospinal fluid (CSF) and located within the brain parenchyma. The ventricular system is composed of 2 lateral ventricles, the third ventricle, the cerebral aqueduct, and the fourth ventricle (see the images below).Survival in untreated hydrocephalus is poor. Approximately, 50% of the affected patients die before three years of age and approximately 80% die before reaching adulthood. Treatment markedly improves the outcome for hydrocephalus not associated with tumors, with 89% and 95% survival in two case studies

<h2>hope this helps have a awesome night/day❤️✨</h2>

Explanation:

8 0
3 years ago
Driving without a seatbelt is an example of which of the six health risk behaviors?
sergiy2304 [10]
<span>Sedentary Lifestyle. The behavior that contributes to unintentional injuries and violence is a risk behavior such as driving without a seat belt, it is a risky behavior that can lead to death or serious injury in a car accident.</span>
8 0
3 years ago
How many atoms can a Carbon atom share?<br>A. One<br>B. Two<br>C. Three<br>D. Four<br>1<br>-​
Natasha2012 [34]

Answer:

D.4

Explanation:

It contains a carbon atom that bonds to six other atoms instead of the four we have been told carbon is limited to. Atoms form molecules by sharing electrons. Carbon has four electrons that it can share with other atoms

7 0
3 years ago
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