Answer:
It should be true
Explanation:
online health class and quick double check
The most direct method by which an ion or molecule can move across a cell membrane is by ____________.A. using an integral protein.B. a sodium-potassium pump.C. simple diffusion. D. active transport.E. osmosis.
Answer:
C. Simple diffusion
Explanation:
Simple diffusion from a high to low concentration is the most direct method that ions or molecules can move across a cell membrane.
Through this method, no proteins are required for transport, and no energy is used.
The ion or molecule being transported directly moves across the cell membrane, without any other factors involved.
So, the correct answer is C. Simple diffusion
Which point in this graph shows the beginning of a period of exponential
growth?
С
Population size-
B
Time
O A. Point C
ОО
B. Point D
C. Point B
PREVIOUS
Answer:
C. Point B
Explanation:
The exposed curve represents a logistic growth model. Population growth depends on density. Natality and mortality depend on the population size, meaning that there is no independence between population growth and population density.
When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate. The population per capita growth rate decreases as population size increases. The population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.
K is a constant that equals population size at the equilibrium point, in which the natality and the mortality rate get qual to each other.
Referring to population size as N, when
N<K, the population can still grow. N approximates to K, the population´s growth speed decreases. N=K the population reaches equilibrium, N>K, the population must decrease in size because there are not enough resources to maintain that size.The sigmoid curve represents the logistic growth model.
Point A: During this period, the population size is relatively stable. Little growth is expressed. Point B: At the beginning of this period, population growth increases softly. The more individuals are in the population, the more that reaches sexual maturity and get to reproduce, leaving fertile offspring. This fertile offspring also get to reproduce and leave more fertile individuals. At the end of the period, the curve shows a sharp slope, reflecting the significant increase in the population reproductive rate. Point C: At the beginning of this period, the population keeps on growing exponentially. But at the end of the period, the curve tends to stabilize, meaning that the population stops growing in size so fast. The population slow and gradually reaches the equilibrium point, K.Point D: The population got to stabilize.Answer:
POINT A
Explanation:
Just took the test :)
A certain animal species has either curly tails (C) or straight tails (c) and either hazel eyes (H) or blue eyes ( h). What are the possible genotypes of an animal with curly tails and blue eyes
Answer:
CChh
Cchh
Explanation:
Cc or CC can be a genotype for curly tails because both have a dominant allele for curly tails
hh can be a genotype for blue eyes because there are two recessive alleles for blue eyes that are present
Three color receptors that responded in an opponent-process fashion had been proposed by ______; this arrangement was later verified by ______ in monkeys.
This question seems to be incomplete. However, there is enough information to find the right answer.
Answer:
Three color receptors that responded in an opponent-process fashion had been proposed by Hurvich and Jameson; this arrangement was later verified by DeValois in monkeys.
Explanation:
In "An opponent-process theory of color vision" (1957), Hurvich and Jameson developed the opponent-color system. In "Color Vision Mechanisms in the Monkey" (1960), De Valois confirmed the existence in monkeys of color-opponent ganglion cells in the retina and color-opponent cells in the lateral geniculate nucleus of the thalamus. De Valois himself states in his research that there´s a clear close parallel between the behavior of what he calls "on-or-off cells" and the findings o Hurvich and Jameson.
What happens to predator populations when prey populations are scarce? Why?
Egg fertilization happens in the?
Umm.. Hi there! Can someone please help me out with this? (only for those who know the answer)
Bcoz I really need this rn :(
even though it is multiple choice, I still need your explanation for your answers. Thanks!!
DUEEEE AFTERRR LUNCHH! :(:(:(:(
If your answer is NONSENSE it will be deleted as soon as possible!
But if your answer is CORRECT, HELPFUL, HAS AN EXPLANATION, I'll chose your answer as the BRAINLIEST ANSWER!
Atomic size increases down a group and descreases across a period because when going down a group number of shells of elements increases and across periods number of shells stay the same but the number of electrons increases which will cause too much weight on the atom and it gets diminished. so according to that:
3. A
4. B
5.C( because noble gases are stable)
1.A
2.C
Answer:
3. (a)
4. (c)
5. (c)
1. (a)
2. (b)
Explanation:
3.
from left to right across a period the atomic size decreases because the nuclear charge increases while the no. of valence shells remains constant. The strong electrostatic force between the nucleus and the electrons draws the outermost shell inwards resulting in decrease of atomic radius from left to right.
so, the answer is a. atomic radius of elements decreases from left to right.
4.
Argon has the largest atomic size. Yeah I know, I just said that the atomic radius decreases on moving across a period BUT Nobel gases are exception. In fact they have the largest atomic size in a period. This is because their valence shells are complete and this cause the internal electrons to repel each other thus pushing the valence shell away from the nucleus causing the atomic size to increase.
so the answer is c. Argon
5.
Halogens have the smallest radius in a period. Because their nuclear charge is greatest in a period.
so the answer is c. Halogens
CONCLUSION :-
1.
since, the atomic size increases down the group and decreases along a period the biggest elements are arranged in the bottom and in the left side of the periodic table.
so option a.
2. For metals the atomic radius is directly proportional to their reactivity
metals have to lose electrons in order to become stable and the easier they lose electrons the higher is their reactivity also that a metal will lose electrons easily if it's atomic radius is large so that the outermost electrons are loosely bonded and can be withdrawn easily.
so option. b.
Which of the following represents a normal
gamete?
A. Dd Rr
B. DRr
C. Dr
D. DdR
PLEASE HELP ME ITS REALLY URGENT,
WILL MARK AS BRAINLIEST!!
Answer:
C. Dr
Explanation:
Gametes only carry one allele for each trait
Describes vitamin D levels and problems
Answer:
Vitamin D is essential for strong bones,because it helps the body use calcium from the diet.
What is fossilized evidence of pollen most likely to reveal? 1a) whether the area was warm, swampy, grassy, or wooded
2a) whether the area was inhabited by people
3a) whether the area was inhabited by many animals
4a) whether dinosaurs lived in the area
__________ always pairs with _________.
Answer:
Adenine and Thymine, Cytosine and Guanine?
Explanation:
Answer:
I always pairs with my best friend
Explanation:
state 2 function of the kidney
ʕ•ﻌ•ʔ[tex]\huge\bold\pink{hello!!!}[/tex]ʕ•ﻌ•ʔ
HERE IS UR ANSWER
_____________________
The kidneys are powerful chemical factories that perform the following functions:
remove waste products from the body.remove drugs from the body.balance the body's fluids.release hormones that regulate blood pressure.produce an active form of vitamin D that promotes strong, healthy bones.HELP ASAP I WILL GIVE BRAINLIST
What is the pH of a solution with a 4.60 × 10−4 M hydroxide ion concentration? (4 points)
0.663
3.33
10.1
10.7
Answer:
10.7
Explanation:
According to this question, we have 4.60 × 10^-4 M hydroxide ion (OH-) concentration.
Since we were given the OH concentration, we first calculate the pOH of the solution, which is given as:
pOH = -log {OH-}
pOH = - log {4.60 × 10^-4}
pOH = - log {0.000460}
pOH = 3.337
pOH = 3.34
Given that; pOH + pH = 14
The pH of the solution = 14 - pOH
pH = 14 - 3.34
pH = 10.66
pH = 10.7
Answer:
The answer is 10.7
Explanation:
Which of the following statements correctly identifies and describes the type of covalent bond found between
oxygen and hydrogen in water molecules?
hydrogen bonds because hydrogen is more electronegative than oxygen
O polar covalent bonds because oxygen is more electronegative than hydrogen
O polar covalent bonds because hydrogen is more electronegative than oxygen
Answer: O polar covalent bonds because oxygen is more electronegative than hydrogen
Explanation:
In the water molecule the two hydrogen atoms and one oxygen atoms forms the chemical structure in this the covalent bond is formed between hydrogen and oxygen and this is formed due to sharing of electrons between hydrogen and oxygen and oxygen being electronegative requires two electrons to complete its valency which are provided by two electrons each from one hydrogen and the O polar covalent bond is formed by this way.
Answer:
d
Explanation:
edge 2020
PNS axons are vulnerable to cuts, crushing injuries, and other types of trauma. However, a damaged ____________ can regenerate if the ____________ remains intact and a critical amount of ____________ remains. The success of peripheral nervous system axon regeneration depends upon two primary factors: (1) the amount of ____________ and (2) the ____________ between the site of the damaged axon and the ____________ . The possibility of repair is ____________ with an increase in either of these two factors. Neurolemmocytes play an active role in regeneration
Answer:
The correct answer is - damaged, effector organ, neurilemma, damage, distance, cell body, decreased.
Explanation:
PNS axons are prone to cuts, and other types of injuries. A damaged axon can regenerate if the effector organ remains intact and a critical amount of neurilemma is found.
The degree of success of these axons regeneration depends upon factors that are (1) the amount of damage, and (2) the distance between the site of the damaged axon and the cell body it innervates The possibility of repair is reduced with an increase in either of these two factors. Neurolemmocytes play an active role in regeneration
If the stomata remain closed due to water loss, what happens to the concentration of CO2 and O2 in the leaf
Answer:
Fixation of oxygen occur instead of carbondioxide.
Explanation:
If the stomata remain closed due to water loss, the concentration of carbondioxide decreases and oxygen increases in the leaf because of the fixation of oxygen instead of carbondioxide by rubisco. The plant takes carbondioxide from the atmosphere when the stomata is open so when the stomata is closed there is no other way for getting carbondioxide into the leave so the oxygen is now being fixed by our rubisco enzyme to that five-carbon compound instead of carbon dioxide.
species separated by inability of hybrid offspring to produce offspring of their own
In which of the scientific classifications are all the
animals grouped
Give the reason for carrying out the following procedures when preparing wet mounts of plant to 1.) Making very thin sections.
Answer:
we should not cut .we should crop .we should give water
Write down Gibbs energy equation and indicate which one is change in enthalpy
What is limiting factor
Answer:
limiting factors are often referred as a lack of a particular resource .
PLEASE HELP!!!
What is the new mRNA strand formed by this gene?
TAG CTT GGC AT
Mode of action of aldehydes and Quaternary ammonium compounds is
Answer:
Aldehydes have antibacterial, antifungal, antiviral and sporicidal activity. These are helpful to destroy the spores of Bacillus subtilis and Clostridium sporogenes. Glutaraldehyde and formaldehyde are commonly used aldehydes in disinfectants.
Quaternary ammonium compounds work by denaturing the proteins of the bacterial or fungal cell, affecting the metabolic reactions of the cell and causing vital substances to leak out of the cell, causing death.
Which of these organelles prepares proteins to be fully functional?
A. Rough endoplasmic reticulum
B. Large vacuoles
C. Smooth endoplasmic reticulum
D. Chloroplasts
Rough endoplasmic reticulum
Answer:
Rough endoplasmic reticulum is among the organelles that are found in eukaryotic cells. The reason as to why it is called rough is because it has ribosomes attached to its surface. Its main function is to produce proteins.
Explanation:
The thin outer layer of the skin is called the _____.
endodermis
dermis
fatty layer
epidermis
The thin outer layer of the skin is known as the Epidermis. So, the correct option is D.
What is Epidermis?The epidermis, which is referred to as the skin's outermost layer, shields the body from the elements. Depending on the kind of skin, the epidermis can be as thin as.05 mm on the eyelids or as thick as 1.5 mm on the palms and soles of the feet.
The body is shielded by the epidermis from harmful substances like chemicals, pathogens (bacteria, viruses, fungus, and parasites), and ultraviolet (UV) radiation. The epidermis, which is the skin's outermost layer and gives skin its tone, serves as a waterproof barrier. The dermis, which lies underneath the epidermis, is made up of hard connective tissue, hair follicles, and sweat glands.
Thus, the correct option is D.
Learn more about Epidermis, here:
https://brainly.com/question/14276320
#SPJ7
How does the structure of a seed help to ensure the growth and
survival of the plant?
Answer:
Outer shell for protection, preventing any germs / orgasims / bugs getting into it?
Explanation:
Guess
Explain the role of cellular respiration in a cell.
Answer:
Every cell performs a type of cellular respiration as it is required to produce energy. The point of cellular respiration is to turn high-energy molecules, know as glucose, into ATP, a form of usable energy. There are two types of respiration, aerobic and anaerobic. Aerobic goes through 3 stages and produces the most ATP by using oxygen and releasing carbon dioxide. Anaerobic does the same job but only uses one stage and produces much less ATP. This process gives the cell energy and continues the carbon cycle.
Based on the dolphins, (mammals of the ocean), why
is it recommended that women who are going to
become pregnant, are pregnant, are nursing and/or
young children, not eat seafood and shellfish in large
quantities or more than 1x per week?
Answer:
Raw shellfish may be contaminated with harmful bacteria and viruses, and therefore carries a higher risk of food poisoning.
Explanation:
You’re naturally more susceptible to food poisoning during pregnancy because of changes to your metabolism and circulation, and as well as being unpleasant for you, food poisoning can increase the risk of premature delivery and infections in your baby
Look at the diagram below.
Х
Which best describes the structure labeled X in the diagram?
Answer:
C
Explanation:
Its transfer element through it channel
What form of government is the US federal government?
Answer:
democratic republic
Explanation:
