what is the function of the pupil and Iris
The iris controls the amount of light that enters the eye by opening and closing the pupil. The iris uses muscles to change the size of the pupil. These muscles can control the amount of light entering the eye by making the pupil larger (dilated) or smaller (constricted).
Answer:
The iris controls the amount of light that enters the eye by opening and closing the pupil. The iris uses muscles to change the size of the pupil. These muscles can control the amount of light entering the eye by making the pupil larger (dilated) or smaller (constricted)
Explanation:
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Select all that apply. Head lice are tiny organisms that can be found on
the eyebrows.
the eyelashes.
the top of the head.
the lips.
the ears.
Answer:
1,2,3
Explanation:
Edg 2021
1. Which European countries sent explorers during the Age of Contact that
set foot in Texas? *
help me please, its biology i need help with the answer an why you chose that answer
Answer:
I think G if I’m wrong try F OR J
Explanation: tell me if I’m wrong
What will most likely occur if two different species of carnivores compete for the same requirements in an ecosystem
Answer:
One species would better adapt to fill that niche, and the other species would be forced to leave the ecosystem or die.
Explanation: I promise its right
Why do deserts tend to form on land at latitudes of 20-30 degrees north and south?
Answer:
Deserts can form even on tropical coasts beside cold ocean currents, such as the west coast of South America. The currents cool the air, which then rises and warms as it moves over land, drawing up moisture that is later precipitated as the air moves farther inland.
A housefly has 12 chromosomes, is it a gamete or a somatic cell?
Answer:
Explanation:
If a housefly cell had 12 chromosomes, then it would be a gamete or a somatic cell (circle one). If a human cell had 23 chromosomes, then it would be a gamete or a somatic cell
Tim does not need to factor his amino acid consumption into the total protein intake because they are components of protein, not full protein
Answer:
Yes.
Explanation:
Yes, amino acid can not be factor or broken down because it is the smallest unit of proteins. Proteins are made up of about 20 small amino acids. Proteins can be factor into amino acids but amino acids can't be factor into proteins because proteins are made up of amino acids but the amino acids does not formed from proteins so that's why Tim does not factor his amino acid into total protein.
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One of the bacteria in Model 1 has a tail-like structure.
a) What is the structure called?
b) What might be the purpose of this structure?
c) Based on your answer of the previous question, what might you infer about the absence of this structure in the other two bacteria cells?
From the bacterial model:
(a) the tail-like structure is known as the flagellum (plural, flagella)
(b) The primary function of the structure is to aid movement. It is moved in a whip-like version to propel the organism.
(c) Based on the absence of of flagellum in the other two bacteria, it means that they are not motile.
The presence of flagellum in bacteria is an indication that such bacteria are motile. The thread-like structure is whipped randomly in order for the organism to move and the absence of it in an bacterium is an indication that such a bacterium is not motile.
More on bacterial motility can be found here: https://brainly.com/question/23021688
write a different living and nonliving things found in rainforest mangrove swamp and coral reef ecosystem
living things are:-
trees plantshrubsfernsbeers deersbirds insects frogsnon living things are:-
water rain temperature soilairrocksIN CORALS REEFS:-living things are:-
fishes coralsmosssea turtlesseaweedslobsternon living things are:-
rock sunlight sandtemperature IN MANGROVE SWAMP:-living things are:-
crocodile monkeyslizardsmicrogramsnon living things are:-
sunlight temperature floodinghope it is helpful...plz mark it is brainliest.how did early cells get their food
Answer:
Through photosynthesis, organisms could use sunlight to make food from carbon dioxide and water.
They provided food for themselves
Explanation:
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What does number 2 on the diagram show?
Number 2 appears to be DNA.
Answer. The correct one is dna
hello help please i’ll mark brainliest!!!
Answer: The answer is A
The moon has moved past the 1st quater and is heading to the full moon
Answer: Than answer to this question is C
Explanation: The waxing gibbous moon is the last phase before the next full moon.
Put the steps of cloud formation in order. 1 should be the first step and 4 will be the
last step.
Rising air currents organize into "thermals"
Sunlight warms the surface and water evaporates
Warm, moist layer builds up between 1000 and 5000 feet
Water vapor in rising air parcels condenses to form clouds
The correct order in cloud formation include the following:
Sunlight warms the surface and water evaporates.Warm, moist layer builds up between 1000 and 5000 feet.Rising air currents organize into “thermals”Water vapor in rising air parcels condenses to form clouds.What is Cloud?They are generally formed high above the ground and are a visible mass of condensed watery vapour floating in the atmosphere.
The correct order in cloud formation can be seen above and is the most appropriate choice.
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Edrophonium is a drug the blocks cholinesterase from breaking down acetylcholine in the muscles. Why does this improve Annie's muscle function?
Answer:
Edrophonium is a drug used for the treatment of myasthenia gravis, a long-term neuromuscular disease that leads to varying degrees of skeletal muscle weakness, which results from antibodies that block or destroy nicotinic receptors at the junction between the nerve and muscle. By blocking cholinesterase, an enzyme which demolish acetylcholine, it increases the amount of acetylcholine in the neuromuscular junction improving the muscle weakness
It improves Annie's muscle function as a result of the acetylcholine not
being able to be broken down in the muscles.
Acetylcholine is a neurotransmitter that sends signals to the brain and other
parts of the body in the activation of the skeletal muscles.
The drug known as Edrophonium which blocks cholinesterase breaking
down acetylcholine in the muscles will thereby lead to more presence of
acetylcholine and a corresponding increase in the muscle functions.
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HELP!!...............
Answer:
option D
Explanation:
Answer:
bacteria do not interact with organisms, so they do not maintain or disrupt their health.
Is d
Explanation:
The number of wild horses, per square mile, in a prairie, is the horse population
5 points
Density
Dispersion
Size
Birth rate
calculate the Deer population for the
Answer:
d
Explanation:
ultiple Choice (1 point each). Identify the choice that best completes the statement or answers the question. b. 1. Thick fur on deer is not an example of coevolution. Why? ... d. predation. The number of wild horses per square kilometer in a prairie is the horse populations a. density. c. size. b. dispersion. d. birth rate. 13.
Explain how altitude affects ecosystems
Answer:
More specifically, biomes are determined primarily by temperature and precipitation and altitude is going to have effects on both temperature and precipitation. As altitude increases, temperature decreases. ... Thus, altitude is going to affect both temperature and precipitation which will affect the composition of biome.
The only type of human cell that is never replaced is ___. *
Answer:
The only type of human cell that is never replaced is Nerve cells.
Hope this helps you. Do mark me as brainliest.
The only type of human cell that is never replaced is nerve cell.
What is a nerve cell?Neurons are in charge of receiving sensory input from the outside world, sending action potentials to our muscles, and transforming and relaying electrical signals at every step in the process.
The nerve cell is the basic unit of communication in the nervous system (neuron). The cell body, a major branching fiber (axon), and numerous smaller branching fibers comprise each nerve cell (dendrites).
They do not divide in any way. There are only two exceptions to this rule: only two specific areas of the brain can produce new neurons. However, for the most part, the brain is unable to replenish dead neurons.
Thus, nerve cells are the ones that never gets replaced after getting injured.
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BT crops are developed by adding traits from which of the following organisms?
phytoplankton
bacteria
viruses
superweeds
Answer:
bacteria
Explanation:
'Bt' crops are genetically modified crops that contains a certain gene of a bacteria called Bacillus thuringiensis. The name of this GM or transgenic crop was coined from the bacteria used.
The gene coding for the toxic traits of the bacteria are added into Bt crops e.g cotton, hence, the crops become resistant to pest attack. Therefore, according to this question, BT crops are developed by adding traits from BACTERIA.
An alien has a mass of 75 kg and weighs 225 N. What is the acceleration
due to gravity on the alien's home planet? Don't forget units! *
Answer:
What is the median of the data displayed in this box-and-whisker plot?
42
49
54
57
Box-and-whisker plot ranging from 34 to 58 with ticks at increments of 1. Plot defined by points at 35, 42, 49, 54, 57.
Explanation:
if the first one is zero divide it
Can you guys pls help me?!!! It’s due tonight put them in order pls :)
PLS HELP!!
In a normal distribution, the number of organisms exhibiting a phenotype variant near the lowest value is(1 point)
-greater than the number exhibiting a variant near the highest value.
-greater than the number exhibiting a variant near the middle value.
-less than the number exhibiting a variant near the middle value.
-less than the number exhibiting a variant near the highest value.
Kamar is looking for his birth mother. Kamar knows that his blood type is AB and his father’s blood type is heterozygous A. What can Kamar assume about his mother’s blood type?(1 point)
-Kamar’s mother must be either AB or B because blood types AB is considered codominant.
-Kamar’s mother must be AB because blood type AB is inherited from one parent.
-Kamar’s mother must be O because the recessive allele allows for Kamar to get type A from his father.
-Kamar’s mother must be either A or O because blood type AB is considered incomplete dominant.
A statistician collects height data in inches for a school district. Which sample is most likely to produce a normal distribution?(1 point)
-Grade 10-12
Height Range 55 - 60 60 - 65 65 - 70 70 - 75
Frequency 4 9 8 4
-Grades 1-3
Height Range 30 - 35 35 - 40 40 - 45 45 - 50
Frequency 4 1 10 10
-Grades 7-9
Height Range 50 - 55 55 - 60 60 - 65 65 - 70
Frequency 11 5 6 3
-Grade 4-6
Height Range 45 - 50 50 - 55 55 - 60 60 - 65
Frequency 12 8 4 1
The different variants of a trait available to a gene are called(1 point)
-alleles.
-genotypes.
-polygenic traits.
-phenotypes.
A wolf populations’ undercoat thickness follows a normal distribution. Suppose climate change causes the winters to grow colder. Over many generations, the distribution of undercoat thickness in this population will likely(1 point)
-shift toward a thinner coat.
-shift toward a thicker coat.
-remain the same.
-no longer be normal.
HELPPPP PLEASE....
:)
1 is a: less than...middle value
2 is c: ab or b
3 is d: grade 10-12
4 is a: alleles
5 is a: ..... thicker coat
Explanation: just took this, these are the correct answers for MY quick check. could very well be different for yours. hope this helps though :)
The wolves undercoat will grow towards been thicker in order to protect the wolves from extreme cold conditions posed by the winter and this phenomena is called adaptation.
Blood types of offspring's are determined by the blood groups of both parents therefore if Kamara has a blood type AB his mother will mostly likely have either AB or B blood type.
Alleles are the different variants of a gene in living organisms but they are located at the same position on the chromosome.
Hence we can conclude that answers to the questions are as listed above.
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where are protein channnels that are used during facilitated duffusion loacated
Answer
Facilitated diffusion is the diffusion
Explanation
Facilitated diffusion is the diffusion of solutes through transport proteins in the plasma membrane
Hope this helps :-)
True or False: When a biotic factor dies, the molecules within that
organism enter into the nutrient cycle.
Answer:
Explanation:
True
When a biotic factor dies, the molecules within that organism enter into the nutrient cycle is a true statement.
Biotic factors:
There are two factors in a living system. Biotic and abiotic. all living organisms are biotic components. Plants, animals, and other living components are biotic components. Air, water, and sunlight are abiotic components.
Biotic and abiotic components together make the nutrient cycle. When biotic components die their molecules enter the nutrient cycle. Microorganisms act on the biotic component when they die.
They release carbon, hydrogen, and other molecules into the atmosphere when they die.
Therefore, When a biotic factor dies, the molecules within that organism enter into the nutrient cycle is a true statement.
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The reticular activating system is part of the____?
Answer:
Reticular activating system (RAS)
Explanation:
Answer:
midbrain
Explanation:
help please!!! asap!!
Answer:
Water
Explanation:
PLEASE HELP ONLY 5 mins left!!!!
Looking at the following template strand of DNA below, what would that mRNA molecule
look like?
DNA: TAC AGGT T C CAT
A.TACAGGTTCCAT
B. AUGUCCAAGGUA
C. UTGTCCUUGGTU
D. UACAG GUUCCAU
Question 13
What is condensation? Describe a way in which it can affect Earth systems.
12pt v
Paragraph
IB в I o Ауду т?у а
Answer:
Condensation is a process in which water vapors changed into liquid state.
Explanation:
Condensation is a process in which water that is present in the vapors form changed into liquid state. Condensation greatly affect Earth systems because this process is responsible for the precipitation on the earth. Condensation occurs in the atmosphere when warm air rises in the atmosphere, cools and unable to hold water vapor. As a result, water vapors condenses to form cloud droplets that falls in the form of rainfall.
please answer all the three questions
Answer:
1. Birds have feathers of different colours.
2. Woodpeckers have long beaks.
3. Sunbird is a non-migratory bird.
or
3. Sunbird is sedentary bird.
Explanation:
hope this helps and is right :)
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