Answer:
true
Explanation:
the condenser lens is the size of the electron beam and the main objective lens is to focus the beam on the sample
so that scanning electron microscope have two projector lens
sorry if its not correct
how do floods affect abiotic and biotic factors
Water is important to every organism. A great portion of chemical reactions that organisms use take place in water, so without water, organisms would not be able to metabolize anything. ... Primary consumers (herbivores) would suffer twofold as their prey (the plants) die and their water source disappeared.
What happens to the moon if Earth’s mass decreased?
answer:
if earth's mass decreased, then the moon would go further away.
explanation:
the gravitational force of earth depends on its massif the mass decreased, then the gravitational force would also decrease which means that the moon would go further awaygravity is the reason why the moon is close to the earth and why we can see it at nightIn order to determine the rate of photosynthesis (the conversion by plants of carbon dioxide and water into glucose and oxygen), the oxygen gas emitted by an aquatic plant is collected over water at a temperature of 293 K and a total pressure of 754.8 mmHg. Over a specific time-period, a total of 1.31 L of gas is collected. The partial pressure of water at 293 K is 17.55 mmHg. What mass of oxygen gas (in grams) forms
Answer:
1.6896 grams
Explanation:
Given that:
Total pressure = The pressure of [tex]O_2[/tex] + partial pressure of [tex]H_2O[/tex]
∴
The pressure of [tex]O_2[/tex] = Total pressure - partial pressure of [tex]H_2O[/tex]
= (754.8 - 17.55) mmHg
= 737.25 mmHg
At standard conditions:
1 mmHg = 0.00131579 atm
∴
737.25 mmHg will be: (737.25*0.00131579) atm = 0.970065928 atm
P ≅ 0.97 atm
The temperature (T) = 293 K
Volume (V) = 1.31 L
Using ideal gas equation
PV = nRT
0.97 × 1.31 = n × 0.0821 × 293
[tex]n = \dfrac{0.97 \times 1.31}{0.0821 \times 293}[/tex]
n = 0.0528
mass of oxygen [tex]O_2[/tex] = no. of moles * molar mass
= 0.0528 * 32
= 1.6896 grams
A scientist discovers a new organism and is trying to classify it. Which observations would most likely indicate that
the organism is an animal?
It is multicellular and can move itself from place to place.
It is heterotrophic and unicellular.
It makes food from sunlight and is eukaryotic.
It is prokaryotic and can move itself from place to place.
Answer:
i think that the answer from your choices would be that
its multicellular and can move itself from place to place.Explanation:
A scientist discovers a new organism and is trying to classify it likely indicate that the organism is an animal, It is multicellular and can move itself from place to place.
Which is multicellular organism?Multicellular organisms are those composed by multiple cells. They are typed in 13 major groups of terrestrial living beings, including animals, plants, fungi, ciliates, algae, and foraminifera.
Thus, option "B" is correct.
To learn more about multicellular organism click here:
https://brainly.com/question/24381583
Which option describes adaptation?
Select one:
A. Parents pass their genes to their offspring,
B. Only the strongest individuals in a population are likely to survive.
C. Over time, populations gain traits that make them more suited for the
environment
D. if there are enough resources, the population will grow
Answer:
C
Explanation:
Adaptation was first purposed by Charles Darwin, he stated that as the environment changes the animals will gain adaptations suitable for the environment. Therefore, C is the correct answer.
Have a nice day.
My eyesight is weak plzz tell me how can i improve?❤
Answer:I will gladly love to help you but what can I improve you with.
Explanation:
Auroras occur in the
a. troposphere
b. stratosphere
c. mesosphere
d. thermosphere
Please select the best answer from the choices provided
C
because they happen in the north or south pole
Answer:
c. mesosphere
Explanation:
HELP
Oldest to youngest
Answer: Oldest to Youngest: B,E,C,D,A
Explanation: Hope that helped! :)
(I HAVE 20min TO ANSWER THIS, NEED HELP) Based on the field lines, what are the charges of the
objects?
OX: positive
Y: negative
OX: negative
Y: positive
O X: negative
Y: negative
OX: positive
Y positive
Answer:
X: positive
Y: positive
Explanation:
The charges of the objects are:
OX: positive
Y: negative
The concept of electric field lines is a way to visualize the electric field around a charged object or group of objects. Electric field lines point in the direction of the electric field at each point, and the density of the lines corresponds to the strength of the electric field.
By following the direction of the field lines, we can make an inference about the relative charge of the objects. For example, field lines that originate from a positive charge will terminate on a negative charge, while field lines that originate from a negative charge will terminate on a positive charge.
Therefore, based on the field lines, we can determine that:
Option 1 is incorrect, as the field lines terminate on a negative charge.
Option 2 is incorrect, as the field lines originate from a negative charge.
Option 3 is incorrect, as the field lines originate from a negative charge and terminate on a negative charge.
Option 4 is correct, as the field lines terminate on a positive charge.
Learn more about charges at:
https://brainly.com/question/3412043
#SPJ7
A scientist has discovered a new plant species in the Amazon rainforest. She tells her fellow scientists that the plant she
has found produces a cone. What might they say about how this plant is different from an angiosperm?
It's because it does not depend on insect pollination.
What results from meiosis of a diploid cell?
Answer:
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell
Explanation:
Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome. ... The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.
define what an intron and exon is
How do we know that humans
are causing the Earth to warm
and the climate to change?
Explanation:
we can track climate patterns back to us on earth and the excessive use of fossil fuels and other gasses contribute to this - its basically proven that we are the reason climate change is a thing. climate will change by itself by us humans are causing this to be much faster than it should be
What do you see happening in the graph 65 million years ago?
Answer: The dinosaurs go extinct.
Explanation: It literally says right there
Which nation did the United States compete with during the Space Race?ChinaJapanthe Soviet Unionthe United KingdomMark this and return
Answer: Soviet Union
Explanation:
Answer:
I think it's "The Soviet Union"
Small, nonpolar hydrophobic molecules such as fatty acids
a. pass readily through a
membrane's lipid bilayer
b. diffuse very slowly through the lipid bilayer
c require special channels to enter a cell
d. are actively transported across cell membranes
c. must enter the cell via endocytosis
Answer:
a. pass readily through a membrane's lipid bilayer
Explanation:
Small, nonpolar hydrophobic molecules such as fatty acids pass readily through a membrane's lipid bilayer.
Small, nonpolar hydrophobic molecules such as fatty acids pass readily through a membrane's lipid bilayer. Therefore, the correct option is option A.
The hydrophilic (water-loving) heads of the two layers of phospholipids in the lipid bilayer face outward towards the aquatic surroundings, while the hydrophobic (water-hating) tails point inward towards one another. The hydrophobic tails of phospholipids share characteristics with nonpolar hydrophobic compounds like fatty acids. These tiny molecules can easily dissolve in the hydrophobic area of the lipid bilayer because of their hydrophobic nature.
Therefore, the correct option is option A.
To know more about fatty acids, here:
https://brainly.com/question/31752492
#SPJ6
Question 7
In prokaryotic cells, the ribosomes:
O A. synthesize proteins
O B. synthesize nucleic acids
O C. synthesize sugars
O D. synthesize fatty acid
Answer:
[tex]\boxed {\boxed {\sf A. \ Synthesize \ proteins}}[/tex]
Explanation:
The ribosomes are small organelles made of RNA and proteins. Its function is the same in both prokaryotic and eukrayotic cells: protein synthesis.
The process begins in the nucleus. The DNA and genetic information is housed here. Certain sections are transcribed and copied to make messenger mRNAs that can fit through the nucleus and pores to travel out to the ribosomes.
The ribosomes use the mRNA in a process called translation. They match each set of 3 nucleotides (a codon) in the mRNA to 1of 20 different amino acids. A special sequence of amino acids forms, the molecule folds, and a protein is formed.
So, a ribosome is the main site for protein synthesis and the correct choice is A.
Giving brainlist PLSS help
5. A student examines the winged insect shown below. Order Go 103 Mantodea Raphidioptera Coleoptera Dichotomous Key Sep Characteristics Insect has an extremely long prothorax (neck) Insect has a short or no prothorax Forelegs come together in a "praying" position Forelegs do not come together in a "praying" position Wings are armor-like with mermbranous hind Wings undereath Wings are not armor-like Wings are triangular in shape Wings are not triangular in shape and head is elongated Insed lacks a proboscis (long, slender snout) and has long filaments at abdominal up Insect has a proboscis and lacks long filaments at abdominal tip Go to 4 Go te 5 Mecoptera Ephemeroptera Lepidoptera Based on the dichotomous key, in what order should this insect be classified? A. Mantodea B. Raphidioptera C. Coleoptera D. Lepidoptera
Answer:
I’m not sure if it’s correct but I thinks it’s A
Explanation:
Looked it up online
Answer:
Its C - Coleoptera
Explanation:
Definition: This is an organism that has two identical alleles for the same genetic trait.
Answer:
the answer to that would be a heterozygous organism.
Explanation:
Are viruses living or non- living?
Provide short explanation
No links please
Answer:
Virus are non living Things :)
What do a Salamander and a Tuna have in common? *
Answer:
DNA structure
Explanation:
zfzgzv hv jvc ncxgheagkz j my
Multiple Choice
Which of the following describes the best way that feed can be modified in order to decrease the need
for antibiotics?
A.mix in organ meats from other animals
B.allow the animals to forage some of their own food
C.include roughage and elements of a natural diet
D.add hormones or other additives to the feed
orgain foods are natural and are believed to protect feom diseases and to be of higher quality. What is the most likely factor keeping organic foods from completely replacing conventional foods? a) greater cost b) health concerns c) environmental issues d) greater availability
Answer: A greater cost
Explanation: just took the test
The following diagram shows the branching tree diagram for some animals.
A slanting line is shown. There are five lines drawn vertically on this line at equal intervals. Shark, Frog, Kangaroo, Lion and Chimpanzee are written on top of each vertical line in order from left to right. Common Ancestor is written on the left end of the line. There is a black circle between each pair of these vertical lines. The first black circle is before Shark and says Vertebrae. The second black circle is between Shark and Frog and says Lungs. The third black circle is between Frog and Kangaroo and says Mammary gland. The fourth black circle is between Kangaroo and Lion and says Placenta. The fifth black circle is between Lion and Chimpanzee and says Large brain.
Which two organisms share the least number of derived characteristics?
Frog and kangaroo
Kangaroo and chimpanzee
Lion and chimpanzee
Shark and chimpanzee
Answer:
Shark and a Chimpanzee
The two organisms that share the least number of derived characteristics are Kangaroo and chimpanzee.
What is branching tree diagram?Branching tree diagram is a diagram that illustrate different groups or taxonomic group of organisms and how they are connected to each other.
Therefore, The two organisms that share the least number of derived characteristics are Kangaroo and chimpanzee.
Learn more about branching tree diagram below.
https://brainly.com/question/9067701
#SPJ6
Extracellular signal molecules that are hydrophilic must bind to a cell-surface receptor in order to signal a target cell to change its behavior. These are examples of hydrophilic hormones in animals: A. tyrosine-derived epinephrin and norepinephrin B. insulin and glucagon C. serotonin and melatonin (tryptophan-derived mammalian neurotransmitters D. All of the above E. None of the above
Answer:
The correct answer is - D. all of the above.
Explanation:
Hydrophilic hormones are the hormones that can not pass through the cell membrane as they are poorly lipid-soluble and cannot pass through cell membranes and bind the receptors present on the surface of the membrane.
Insulin and glucagon are peptide hormones that bind to a receptor in the target cell's membrane surface. Norepinephrine and epinephrine are catecholamines that are hydrophilic in nature. Seratonin and Melatonin are also bound on the surface receptor due to their hydrophilic nature.
Elephants live grouped in herds. This is why it is so difficult for a lone elephant living at a circus or exhibit. What type of population distribution do we call animals that live in herds, schools or other groups?
A
random
B
uniform
C
clumped
D
density cluster
Answer:
clumped
Explanation:
Uniform dispersion is observed in plant species that inhibit the growth of nearby individuals. Random dispersion occurs with dandelion and other plants that have wind-dispersed seeds that germinate wherever they happen to fall in a favorable environment. Clumped dispersion is seen in plants that drop their seeds straight to the ground, such as oak trees, or animals that live in groups, such as schools of fish or herds of elephants.
Which characteristic do both viruses and bacteria have in common?
A. They contain a nucleus and organelles.
B. They make their own food,
C. They require a host cell to reproduce.
D. They contain nucleic acids such as DNA and RNA.
Answer:
:D
Explanation:
In many large mammal populations, highways can be barriers to movement - individuals rarely cross them. One solution to this problem has been to install overhead bridges for wildlife to safely cross. The goal is to increase gene flow between the populations on either side of the highway. Which of the following would you expect to see if the bridge is successful in its goal?
a) The two populations would have different mutation rates
b) We would see fewer heterozygotes in both populations
c) Higher levels of drift would occur after the bridge is installed
d) The two populations would become more genetically similar
e) Both populations would decrease in size
Answer: c. Higher levels of drift would occur after the bridge is installed
Explanation:
Based on the information given in the question, if the bridge is successful in its goal and overhead bridges are installed for wildlife to safely cross, then there'll be higher levels of drift after the bridge is installed.
Since the highways are barriers to the movement of the wildlife, overheard bridges will bring about movement on the other side of the highway and this will result in and increase in drift between both parts of the highway. This will also help in the increase of gene flow between the populations.
Therefore, the correct option is C.
if anyone has done this assignment before and knows the answers please help I’ll mark brainliest
Answer:
1. I will put a.c in home and drink cool and stay cool
2. I will drink ginger tea and coffee
it will automatically do when I eat some hot things it will warm when I eat cool I feel chill ☺️