Answer:
i thinks
Explanation:
400x
0.4mm
lens
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
In which of the scientific classifications are all the
animals grouped
Which of these statements are true about diffusion
A. It is how gas exchange occurs in the blood cells in the circulatory system
B. It is when particles move from an area of low concentration to high concentration
C. It is how white blood cells travel around in the body to find viruses and bacteria
D. It is how sunlight gets absorbed into chloroplast in plants for photosynthesis
Answer: c
Explanation:
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
The islets of Langerhans are surrounded by
A-exocrine cells that produce digestive fluid.
B-endocrine cells that produce digestive fluid.
C- exocrine cells that produce glycogen
D-B and C
PLEASE HELP ME ITS REALLY URGENT CAUSE I HAVE EXAMS TOMORROW!!!
Answer:
A-exocrine cells that produce digestive fluid.
Explanation:
The pancreas is composed of both exocrine cells (capable of producing digestive enzymes) and endocrine cells (involved in the production of hormones that control glucose homeostasis). The islets of Langerhans are clusters or 'islands' of pancreatic endocrine cells, which consist of α-cells that produce glucagon, β-cells that secrete insulin and δ-cells that produce somatostatin. These islets are surrounded by: 1-exocrine cells called 'acini' that produce digestive enzymes such as chymotrypsin, trypsinogen, lipase, and elastase; and 2-bile ductules, which are tubes that carry bile from the liver and the gallbladder through the pancreas.
Quadrupedal monkeys __________ Group of answer choices have long arched spines for flexible movement when leaping. hold their bodies parallel to the ground (pronograde posture) when walking have narrow rib cages with scapula on the side, limiting the range of motion in the shoulder All of these traits characterize quadrupedal monkeys
Answer:
All of these traits characterize quadrupedal monkeys
Explanation:
Quadrupedal monkeys have long arched spines that is used for flexible movement when jumping to a height. They hold their bodies parallel to the ground because of pronograde nature means these monkeys walking with the body by using four legs. While walking they have narrow rib cages with scapula on the side that limits the range of motion in the shoulder.
Identify the molecule that is not a compound
Answer:
dear, your question seems to be incomplete.......plz ask it again
Which of the following is the best definition of the term nonrenewable
resource?
A. A resource that can be replaced naturally within a reasonable time
period
B. An inexpensive resource
C. An expensive resource
D. A resource that takes many years to replace
Which one A or D help me pls
Answer
D.
Explanation
Non renewable resources such as coal, if not used sustainably will get over fast and coal is used for many purposes, if this resource gets over it will take hundreds of years to come back
Answer:
D). A resource that takes many years to replace.
Explanation:
Trust me
What is the answer with explaining
Answer:
EeWw
Explanation:
The allele for the earlobe is depicted as e while that of the hairline is w.
A parent that is homzygous recessive for earlobes (ee) and homzygous dominant for hairline (WW) would have the genotype eeWW.
The other parent that is homzygous dominant for unattached earlobes and homzygous recessive for hairline would have the genotype EEww
eeWW x EEww
During meiosis, each genotype will form gametes.
eeWW: eW, eW, eW, eW
EEww: Ew, Ew, Ew, Ew
These gametes will randomly unite during fertilization to produce offspring. Since the same gametes are formed by each parent:
eW x Ew
offspring
100% EeWw (see the attached image for the Punnet's square)
The genotype of all the children would be EeWw and would phenotypically be with unattached earlobes and dominant hairline.
Viral or bacterial germs that invade body cells are called _____.
phagocytes
pathogens
white blood cells
lymphocytes
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 phenomenon is called a revision why did it happen
Answer:
help in studying
Explanation:
What is the probability that a hybrid individual with the genotype AabbCcddEeFf will produce a gamete that has the genotype abCdeF
Answer:
6.25%
Explanation:
Find the number of different gametes that can be produced
number of gametes produced = 2^n
n is the number of allele pairs that are heterozygous
there are 4 heterozygous allele pairs, these are: Aa, Cc, Ee and Ff
2^4 = 16
abCdeF is one of the 16 genotypes that could be produced
to find the percentage, divide 1 and 16 and multiply by 100
1 ÷ 16 = 0.0625
0.0625 × 100 = 6.25
a) explain covalent bond and hydrogen bond with an example of each (4marks)
b)state three(s) importance of surface tension and example( 6marks)
Answer:
Covalent bond is a primary chemical bond formed by the sharing of electron pairs. Covalent bonds are strong bonds with greater bond energy. Hydrogen bond is a weak electrostatic attraction between the hydrogen and an electronegative atom
Calculate the number of neutrons in atoms of the isotope 3919K
With working out
Answer:
20 neutrons
Explanation:
In the atom of an element, there exists three subatomic particles namely; proton, neutron and electron etc. The sum of the number of neutrons and number of protons (a.k.a atomic number) in an atom makes up the mass number.
In this question, an element was given as follows: 39- 19 K meaning that the mass number is 39 but the atomic number is 19.
Hence,
no of. neutrons = mass no. - atomic no.
39 - 19 = 20 neutrons.
Which refers to the distance from the midpoint to the highest point for a transverse wave?
are amino acids associated with proteins
Answer:
Yes
Explanation:
Amino acids create proteins
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
Our eyes are always the same size from birth
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✍︎☔︎ᴍᴀᴛʜᴅᴇᴍᴏɴǫᴜᴇᴇɴ☔︎
✍︎ᴥ︎︎︎ᴄᴀʀʀʏᴏɴʟᴇᴀʀɴɪɴɢᴥ︎︎︎
✍︎ꕥᴋɪᴍ ᴀʀᴀꕥ
What is immigration?
A. When animals leave an ecosystem
B. When animals are born in an ecosystem
Ο Ο Ο O
C. When animals move into an ecosystem
D. When animals die in an ecosystem
Answer:
C. When animals move into an ecosystem
Explanation:
Which critter trait is affected by an environmental factor, such as light, temperature, or
diet? Explain.
Answer:
Tallness.
Explanation:
Tallness is the critter trait that is affected by an environmental factor, such as light, temperature, or diet because the organism remains short if they are not getting food properly as well as temperature. Food provides essential nutrients that contribute in the growth of organism. Suitable temperature of the body allows the different functions in the body to be done which directly affects the growth of the body and the organism becomes taller.
heavenly bodies that travel around a planet are called satellites or moon which planet has no satellite or moon
A. mars and venus
B. jupiter and venus
C. jupiter and mars
D. mercury and venus
Answer:
i think its A. i dunno if it is btw have a nice day
Answer:
D. Mercury and Venus
Describes vitamin D levels and problems
Answer:
Vitamin D is essential for strong bones,because it helps the body use calcium from the diet.
List three potential effects of errors occurring during meiosis.
Errors can occur during meiosis producing gametes with an extra or missing chromosome. The consequences of this following fertilisation depend on which chromosomes are affected. Often the embryo is not viable, but some of these errors can lead to trisomy conditions or sex chromosome disorders.
Explanation:
:)
When you pushed the diaphragm up what change occurred in chest cavity pressure? Explain how this change in chest cavity pressure affected the lungs.
Answer:
positive pressure
Explanation:
Exhalation is a passive process during which the intercostal muscles and the diaphragm relax. The ribs move downward and inward, while the diaphragm rises. This movement causes the chest to decrease in size and positive pressure to build inside the chest cavity. The positive pressure pushes air out of the lungs.
What is limiting factor
Answer:
limiting factors are often referred as a lack of a particular resource .
Why do you think type 2 diabetes occurs so much more often than other inheritable diseases? Propose a hypothesis for why this allele has not been eliminated by natural selection.
Which type of species best describes a mouse: opportunistic or equilibrium? Explain why a mouse or rat population would continuously grow while other mammals (cheetahs) are nearly extinct.
Answer:
This allele has not been eliminated by natural selection because it may confer an adaptive advantage for particular environmental conditions
Mice and rats are opportunistic species. These species can rapidly adapt to different environmental conditions, while cheetahs are unable to adapt to changing environments.
Explanation:
An allele is a gene variant that may be beneficial, neutral, or deleterious for a particular environment. Different alleles are not eliminated by natural selection against other alleles (even when a priori seem to be deleterious) because they confer a selective advantage in a given environment. For example, the allele for sickle cell anemia is caused by a point mutation which is lethal in homo-zygous individuals, but heterozygous individuals are less likely to die of malaria, thereby this allele has been positively selected in geographic areas where malaria is an endemic disease. Moreover, mice and rats are opportunistic species, i.e., they are species that rapidly adapt to varied living conditions. These species are characterized to have high growth rates and produce many offspring. On the other hand, the cheetah is a highly specialized species that is unable to adapt to changing environments. In consequence, cheetah populations are more prone to become extinct than rat and mice populations.
Are lizards reptiles or amphibians?
Answer:
Reptiles are turtles, snakes, lizards, alligators and crocodiles. Unlike amphibians, reptiles breathe only through their lungs and have dry, scaly skin that prevents them from drying out
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.
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.
