Answer:
The membrane is selectively permeable because substances do not cross it indiscriminately.
Explanation:
Which example best describes a reflex action?
A. going for a walk outside
B. bending down to lift a heavy object
C. eating food when hungry
D. coughing when the throat is irritated
Answer:
D
Explanation:
coughing when the throat is irritated
if a single gene has 3 or more alternative forms, this is called
Hi there! Your answer is "multiple alleles."
Have a great rest of your day!
Please, could someone help me with this?
1. abortion
2. testing cosmetic products on animals
hope this helps :)
which muscle functions in extensions of the digits of the hand?
Who developed the classification system that contained five levels and two kingdoms?
Aristotle
Linnaeus
Whittaker
Woese
Answer:
Linnaeus
Explanation:
hope it helps
-thank you
the plasma membrane of skeletal muscle is called the:
Answer:
Muscle Fiber or the sarcolemma
Explanation:
which contains sarcoplasm, the cytoplasm of muscle cells.
What muscle type is located in blood vessels?
a
cardiac muscle
b
striated muscle
c
skeletal muscle
d
smooth muscle
Answer:
d.smooth muscle
Explanation:
Blood vessels contain only smooth muscle cells. These muscle cells reside within the tunica media along with elastic fibers and connective tissue
Answer:
d smooth muscle
Explanation:
Involuntary muscle that is found within the intestines, throat, uterus, and blood vessel walls.
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Which of the following genetic crosses follows the Mendelian inheritance?
A) P generation: brown lab x black lab; F1 generation: yellow lab
B) P generation: A blood x B blood; F1 generation: AB blood
C) P generation: Red-eyed fly x Red-eyed fly; F1 generation: White- eyed fly
D) P generation: Widows peak x straight hair-line; F1 generation: Widows-peak
Explanation:
The key principles of Mendelian inheritance are summed up by Mendel's three laws: the Law of Independent Assortment, Law of Dominance, and Law of Segregation.
what is the main difference between a mrna and trna?
mRNA is the connection between Gene's and proteins while tRNA provides correct amnio acids to the ribosomes.
In what stage do cells spend most of their life
Answer:
the interphase stage
info at
https://www.genome.gov/genetics-glossary/Cell-Cycle#:~:text=A%20cell%20spends%20most%20of,mitosis%2C%20and%20completes%20its%20division.
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which type of microscopy allows us to clearly view the internal contents of cell structures smaller than 200 nm?
Because the cell structures are so small, to clearly view them, requires a microscope that has a higher power of magnification than light microscopes can prove. This is usually an Electron Microscope.
Electron microscopy (EM) is a technique used to obtain high-resolution images of biological and non-biological specimens. It is often used to investigate the detailed structure of tissues, cells, organelles, and macromolecular complexes. (UMass Chan Med School Website)
17. What two headed muscle comes together with the soleus to attach to the heel?
The gastrocnemius muscle
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what by-product of anaerobic respiration makes this possible
Answer:
The end products of anaerobic respiration are Lactic acid or ethanol and ATP molecules. Anaerobic respiration takes place in the absence of oxygen and is seen in lower animals. During the process of Anaerobic Respiration in prokaryotes, there is a breakdown of glucose to produce energy for cellular activities.
Explanation:
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why is it advantageous for cells to switch to anaerobic fermentation in the absence of oxygen
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How cells extract energy from glucose in the absence of oxygen. In yeast, anaerobic reactions produce alcohol, while in your muscles, they form lactic acid.
it is advantageous for cells to switch to anaerobic fermentation in the absence of oxygen because Anaerobic processes in yeast produce alcohol, whereas they produce lactic acid in your muscles.
What is anaerobic fermentation?
Generally, Once the oxygen is removed from the fermentation vessel and replaced with N2, CO2, etc of the fermentation, anaerobic fermentation begins.
In conclusion, Anaerobic processes in yeast produce alcohol, whereas they produce lactic acid in your muscles.
Read more about Mammals
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where are the proteins of the electron transport chain located in a eukaryotic cell?
Answer:
In eukaryotes, the electron transport chain is located in the inner mitochondrial membrane. In prokaryotes, it is located within the plasma membrane
the antibiotic penicillin which made from fungi is harmfull for bacterias?
Answer:
From 1945–1955 the development of penicillin, which is produced by a fungus, along with streptomycin, chloramphenicol, and tetracycline, which are produced by soil bacteria, ushered in the antibiotic age.
Explanation:
Hope it helps you..!
suppose you and a friend are making iced tea using identical glasses. You both use the same amount of water, and the water temperature is the same in both glasses. Explain how you can tell who added more ice tea mix to the glass.
Answer:
Iced-Tea Problem
220 g of 35˚C tea (water) is poured over 250 g of -10˚C ice.
What happens...
The warm water (tea) will cool down to 0˚C. As it cools the ice will heat up to 0˚C and then start to melt.
There is plenty of ice however and only a portion of it will melt. Find the amount of ice that melts into water
and you’ll know the final composition and even the dilution factor on the tea.
Cool tea water down to 0˚C
4.184 J/g˚C · 220 g · 35˚C = 32216.8 J removed to cool tea to 0˚C
Warm ice up to 0˚C
2.09 J/g˚C · 250 g · 10˚C = 5225 J to heat ice up to 0˚C
This heat comes from the cooling water, so substract this amount off the total above
32216.8 - 5225 = 26991.8 J of heat that will MELT the ice
mass of ice melted = 26991.8 / 334 = 80.8 g of ice melted
220 g + 80.8 = 300.8 g of water
250 g - 80.8 = 169.2 g of ice
final mixture for
my glass of iced
tea all at 0˚C
220.0 g original tea
300.8 g final tea
The dilution factor is simply the original volume
over the final volume (or masses here ). = .731 or 73.1%
of the original
concentration
If I’m going to get a dilution of 73.1%, I should
compensate by mixing my tea in 26.9% LESS
volume than the directions state. So I will not dilute
the tea to 2 quarts (64 oz), but rather to 1.462
quarts (46.8 oz).
It’s hot and I want a glass of iced tea as soon as possible. The directions for my tea say to boil some water,
add 2 tea bags (these are the big bags), steep for 4-5 minutes, then add enough water to make 2 quarts which
turns out to be a pitcher of tea. However, if I make this tea the exact concentration I want now, when I pour
it over ice the ice will melt (because the tea will still be quite warm) and my tea will be too dilute. So I
calculate how much stronger I should make the tea KNOWING I will pour the warm tea over ice to make
my glass of iced tea.
(a). What is the final temperature and composition of the glass of iced-tea?
(b). What will be the concentration of the tea relative to the original concentration?
(c). How concentrated should I mix the tea knowing that it will be diluted when
poured over the ice?
(a)
(c)
(b)
only 73.1% of the full
amount to compensate
for dilution
What do the arrows mean on a food web or food chain
Answer: It represents the flow of energy in an ecosystem. It indicates which direction the energy and nutrients will flow. It shows the relationship between organisms.
Does galena occur naturally
Answer:
Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important ore of lead and an important source of silver. ... It is often associated with the minerals sphalerite, calcite and fluorite.
Explanation:
Hope this helps
Line is defined as a
a. a geometric shape that is open and moves from one point to another.
b. a slowly curving path along a plane.
C. a path through space.
d. The distance or area between around, above, below,and within objects.
Please select the best answer from the choices provided
Ο Α
ОВ
OD
Answer:
A is the answer
Explanation:
a line is a infinetly thin infinetly long straight line.
what is the last structure of the air passageway in your lungs
Answer:
Bronchioles
Explanation:
You inhale through your nose and the air is filtered. It goes down the pharynx. It goes through the larynx. A "door" called the epiglottis opens during breathing. Then it enters the trachea. (windpipe) It goes through the bronchus. The tertiary bronchi branch into fine tubules called bronchioles, the last passageways for air. Air ends its pathway in the ________. (I bet you can guess because you're so smart!) They're surrounded by capillaries that connect the pulmonary arteries and veins. This enables the transfer of oxygen and carbon dioxide.
I hope this helped!!! Good luck on the test/quiz/project/homework/etc. you're working on! If you want I can give you a l!nk to the article I used. If not, it's fine too. Have a great day!
74 POINTS!!!!!!!!
Do you think we should attempt to
quantify and assign market values
to ecosystem services and other
entities that have only non-market
values? Why or why not?
Answer:
yes
Explanation:
yes because I like the same thing cuz you just like doing like what you have to do and I did it already and I got it a
Convert 10 cm to meters and express the answer to the correct number of significant digits.
A) 0.10 m
B) 0.1 m
C) 100 m
D) 1 m
Answer:
B. 0.1
Explanation:
Trust me
Answer:
(b) 0.1 m
Explanation:
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IM THE DUMMEST PERSON ALIVE
plz help me on this it’s due today
Answer:
Help with what boo?
Two things acting upon each other
Answer:
The meaning of force? or gravity pulling the object towards the Earth.
the vitamin that poses the greatest risk for toxicity is:
In the stable food chain shown below, what would you expect to happen initially if you were to suddenly double the population of rabbits?
A food pyramid, top to bottom: hawk, snakes, rabbits.
a.
The populations of the other three species would also increase.
b.
The populations of the other three species would decrease.
c.
The grass population would decrease. The snake population and hawk population would increase.
d.
The grass population and hawk population would decrease. The snake population would increase.
Please select the best answer from the choices provided
A
B
C
D
Answer:
she is wrong , its c
Explanation:
The grass population would decrease. The snake population and hawk population would increase.
The correct answer is option C. . If you were to suddenly double the population of rabbits, the grass population would decrease due to overgrazing by the increased rabbit population.
What will happen in result to it ?As a result, the snake population and hawk population would increase due to the increased availability of prey. This is known as a trophic cascade, where changes in one trophic level affect the populations of other trophic levels in the food chain.
Option A and B are unlikely as doubling the population of rabbits would not necessarily cause the populations of the other three species to increase or decrease in a straightforward manner.
Option D is incorrect as there is no direct relationship between the rabbit population and the hawk population in this food chain.
Learn more about population control at :
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which phyla do crinoids and sea cucumbers belong to?
what is the name used to refer to the clogged xylem tissue?
The name used to refer to the clogged xylem tissue is heartwood in contrast to sapwood, a term for the dead, clogged xylem cells near the center of a tree. Heartwood has been the tree as the main column of support.
What is xylem?Xylem has been defined as the vascular bundle which has been used to transport water and other minerals from the root part to other parts of the plant. The main function of the xylem and phloem is to transport water and minerals from root to other parts of the plant.
The last common ancestor of the gymnosperms and angiosperms possessed the same characters such as the pollen, seeds, and the vascular tissue.The gymnosperms are a group of plant that are known as seed- producing plants such as Ginkgo, gnetophytes, cycads etc.
Angiosperms has been the plant that produces flowers and having seeds enclosed within their fruit. Gymnosperms have no production of flowers and fruits and they contain bare seeds on the surface of their leaves.
Therefore, The name used to refer to the clogged xylem tissue is heartwood in contrast to sapwood, a term for the dead, clogged xylem cells near the center of a tree. Heartwood has been the tree as the main column of support.
Learn more about xylem on:
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