Answer:
The cell membrane is semi-permeable. (or selectively permeable). The unique structure of the cell membrane allows small substances (like oxygen or carbon dioxide) to easily pass through.
Explanation:
The principal components of the plasma membrane are lipids (phospholipids and cholesterol), proteins, and carbohydrate groups that are attached to some of the lipids and proteins. A phospholipid is a lipid made of glycerol, two fatty acid tails, and a phosphate-linked head group.
Answer:
Explanation:
Because the cell membrane is a selectively permeable membrane it decides what it will allow to pass through the membrane wall and what will not
From the giraffe story, give an example of the following:
1. Variation
2. Adaptation
3. A factor affecting the size of a population
Answer:
1. Each Giraffe's neck length is different
2. The tall neck Giraffes reproduced and their off spring inherited their genes
3. A drought occurred.
Explanation:
What is the highest possible elevation shown on the map?
Answer:
Point B
Explanation:
Someone please tell me the closest planet and the farthest in order 1-8
Answer:
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Explanation:
Answer:Closest to farthest: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
Explanation:
ANSWER QUICK PLS I WILL GIVE BRAINLYIST
At what point should health officials have started to control the spread of Ebola in West Africa? It needs to be an essay.
A scientist is extracting the DNA of a multicellular organism. He finds that 20% of the strands bases are Thymine. Based on Chargaff's rule, what percentage of the
strands bases would be Adenine?
A. 20%
B. 70%
C. 40%
D. 60%
Answer:
A. 20%
Explanation:
A DNA molecule consists of four nucleotides viz: Adenine (A), Thymine (T), Guanine (G), and Cytosine (C). According to Chargaff in his complementary base pairing rule, these nucleotides pair with one another in such a way that A bonds to T, while G bonds to C.
Based on Chargaff's rule, the amount of Adenine in the DNA is equal to the amount of Thymine while the amount of Guanine is equal to that of Cytosine i.e. A=T, G=C.
A + T + G + C = 100%
Hence, in this question, a scientist finds that 20% of the strands bases are Thymine. This means that the amount of Thymine in that DNA will also be 20%. S
Since A=T = 20% in accordance to Chargaff rule.
Erythrocytes (red blood cells)have no nucleus, mitochondria, orother organelles at maturity. Theseorganelles are ejected when the RBCenters the bloodstream, or shortlythereafter. Should this still beconsidered a cell? What will be theeffect of having no nucleus? In thesecells, the lack of mitochondria is anadvantage. Why?
Answer:
Erythrocytes are not considered true cells, because of their lack of a nucleus. The effect of having no nucleus makes their self-reproduction impossible, and the absence of mitochondria is a disadvantage because they have to obtain energy by alternative reactions.
Explanation:
Erythrocytes, or red blood cells, are the structure in charge of transporting gases in the blood. When these cells are mature, they have already lost their nucleus —in order to have space to house the hemoglobin molecule— which prevents mature red blood cells from being able to reproduce.
Additionally, red blood cells do not have mitochondria —the main energy generator in eukaryotic cells— so in order to obtain energy they need to perform lactic fermentation, with a lower enegetic yield, which may be a disadvantage, but sufficient for this structure to perform its function.
What dose the numbers on the map mean
Answer:
how far you need to go and the coordinate 55 south or something
Explanation: 55 south or something
DNA is always present in lysosomes. a. TRUE b. FALSE
Answer:
False
Explanation:
Lysosomes are membrane-bound vesicles that recycle waste products. They contain digestive enzymes that breakdown waste and recycle the components in the cell. For example, old cellular organelles, viruses or bacteria, large biomolecules.
They might sometimes contain DNA, but not always.
Which best describes the alternation of generations? Fertilization produces haploid spores. Meiosis produces a diploid zygote. A gametophyte is its diploid phase. A gametophyte is its haploid phase.
Answer:
A gametophyte is its haploid phase.
Explanation:
The statement that best-described alternation of generation would that a gametophyte is a haploid phase.
Alternation of generation is a type of life cycle that involves alternating between the diploid (2n) and the haploid phase of the same organism. The haploid gametophyte produces the male and female gametes that fuse together to form a diploid zygote during fertilization.
The zygote divides mitotically to give the diploid sporophyte. The latter undergo meiosis to produce haploid spores which then germinates to give rise to haploid gametophytes and the cycle is repeated.
Answer:
D. A gametophyte is its haploid phase.
Explanation:
On edge cuhzz
The differences between two molecules include the type of sugar that forms a section
of the molecules and the identity of one of the four nitrogenous bases that make up
another section of the molecules. These two molecules are -
A proteins
B lipids
C nucleic acids
D complex carbohydrates
1. How much force accelerate a bicycle and rider with mass 60 kg at 1.5 m/s?
Answer:
Force, F = 90 N
Explanation:
Given that,
Mass of the bicycle and rider, m = 60 kg
Acceleration of the bicycle and rider, a = 1.5 m/s²
We need to find the force acting on the bicycle and rider to accelerate. Let it is F. Its force is given by :
F = ma
F = 60 kg × 1.5 m/s²
F = 90 N
So, the force acting on the bicycle and rider is 90 N.
Cells use a molecule called
Choose...
to store and release energy like a battery. The energy is stored in chemical bonds between
Choose...
groups of the molecule, and the energy is released when the chemical bonds are broken.
Answer:
ATP & Phosphate
Explanation:
just took the quiz and got it right
Which is the process by which green plants use sunlight, water, and carbon dioxide to make food?
o photosynthesis
o cellular respiration
o anaerobic respiration
o fermentation
Where do ETC reactions take place
Please help 16 points
Answer:
its A
Explanation:
Carbon dioxide + water + energy from light produces glucose and oxygen
HELP PLEASEE
What is the difference in climates east and west of the Cascade Mountains in the Pacific Northwest?
There is more cloud cover and more rain in the east of the Cascade Mountains,
O There are colder winters in the west but milder winters in the east of the Cascade Mountains,
O There is more sunshine and less rain in the west of the Cascade Mountains
There are milder winters in the west but colder winters in the east of the Cascade Mountains,
Answer:
There are milder winters in the west and colder winters in the east
Answer:
There are milder winters in the west but colder winters in the east of the Cascade Mountains. or d/4th one
Explanation:
made it easier to read other one
B. What is the largest cell called?
This is the largest cell in the human body. In
contrast, the sperm cell is the smallest cell in
the human body.
HELP ASAP!!!
Help me please....pleaseeeeee
Answer:
B
Explanation:
When your body gets to the tempature of 98.8F you start to over heat and sweat.
does any one know whats wrong with my foot it has been in constant pain since yesterday now i dont know if it is a sprain or what plz help im in constant pain now i can hardly walk it is the long near the big toe right in the center of the long bone conecting to my ankle plz i need to know if i need to go to doctor.
Answer:
Yes. You need to go to the doctor.
Explanation:
Your foot could be doing this because the bone itself could be bruised or else it somehow got injured or is in some other type of pain.
What's the term that describes all the chemical reactions taking place in an orgasm
Answer:
Metabolism
Explanation:
The structure labeled "A" open and close the sites where the gases, carbon dioxide and oxygen, are exchanged during photosynthesis. What is the structure labeled A?
The structure A in the question seems missing but the given answer is based on the description given in the question.
Answer:
The gaseous exchange of carbon dioxide(CO2) and oxygen(O2) occurs through small, regulated openings called stomata during photosynthesis.
Therefore the Structure A is Stomata
A cell’s nucleus will divide during mitosis. Whaat process must happened before it can divide?
Function of trichocyst
Answer:
Just read this and summarize it
Explanation:
There you go!
Gravity causes a ball to fall is which law
What macromolecules provide instruction for growth
4. Food molecules diffuse through the wall of the intestines directly into the blood. Which two systems directly interact during this process? A respiratory and circulatory C immune and digestive B circulatory and muscular D digestive and circulatory
Answer:
D digestive and circulatory system
Quick question please help (: 40 points
Suppose a scientist found a new fossil that indicated it was a primitive mammal. Relative dating techniques place the age of this fossil at a much earlier time than mammals were thought to exist. What effect will this finding have on understanding of the history of life?
A.
The split between mammals and nonmammals in the tree of life needs to be shifted back.
B.
A new branch needs to be added to the tree of life.
C.
An existing branch on the tree of life needs to be removed.
D. Other fossils need to be retested to be sure that the ages assigned to them are not in error.
Answer:
d
Explanation:
which of the following cell is also called rechargeable battery. . primary cell., secondary cell,. dry cell., none of these.
Anyone looking forward to the holidays? that might be the only thing good out of this year
Which of the following types of fats are most associated with heat disease? (They tend to be solid at room temperature)
A. Monounsaturated
B. Polyunsaturated
C. Phospholipids
D. Saturated fats
Answer:
Saturated Fats
Explanation:
BRAINLIEST PLEASEEEEE
polyunsaturated
Explanation:
all dietary food contains(polyunsaturated)are solid