How did eukaryotic cells originate?
Answer:The hypothesis that eukaryotic cells evolved from a symbiotic association of prokaryotes—endosymbiosis—is particularly well supported by studies of mitochondria and chloroplasts, which are thought to have evolved from bacteria living in large cells.
Explanation:
5 sources of food contamination
Answer:
Major contamination sources are water, air, dust, equipment, sewage, insects, rodents
Explanation:
Contamination of raw materials can also occur from the soil, sewage, live animals, external surface, and the internal organs of meat animals.
How is Uranus similar to Jupiter?
It has rings.
It has no moons.
It has a rocky surface.
It has methane in its atmosphere
.
Uranus and Jupiter both have rings, both have moons, but they are mostly gas planets, and both have some methane. I think id.k if that helped
Uranus is similar to Jupiter in that it has methane in its atmosphere. Therefore, the correct option is D.
What are Uranus and Jupiter?Both Jupiter and Uranus are planets in our solar system. Jupiter, the largest planet in our solar system, is located five planets from the Sun. Uranus, the third largest planet in our solar system, is located at a distance of seven planets from the Sun.
Both planets are gas giants, with atmospheres composed mostly of hydrogen and helium. Their upper atmospheres also include methane gas, which gives them a blue-green colour. However, there are many differences between Uranus and Jupiter. Although they are much less noticeable than Saturn's rings, Uranus has a system of rings and at least 27 moons. Compared to Jupiter, Uranus is smaller and has less mass.
Therefore, the correct option is D.
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The thin segment of the nephron loop's descending limb ________. The thin segment of the nephron loop's descending limb ________. is easily broken and replaced often aids in the passive movement of water out of the tubule aids in the passive excretion of nitrogenous waste helps to pack a greater number of nephron loops into a smaller space
Answer:
The correct answer is ''aids in the passive movement of water out of the tubule''
Explanation:
The nephron loop has a descending branch, which goes to the renal medulla, and an ascending branch, which goes back to the cortex. The nephrons of these kidneys can have loops of Henle of different dimensions. The thin segment of the loop has thin epithelial membranes, its cells are highly permeable to water, but not to solutes. The water that exits from the descending portion of the nephron loop into the medullary space is immediately reabsorbed by the peritubular capillaries, causing osmolality to increase in both the tubular fluid and the medullary interstitial fluid. The characteristics of the descending branch differ from one species to another, the normal thing is that in one way or another, the osmotic concentration of the urine that moves through it is balanced with that of the interstitial fluid.
I need help with this one too!!!
Answer:
EE is dominant ee is recessive, the probability of the child having ee is 25 percent
If a parent cell has 3 chromosomes before mitosis,how many chromosomes will each daughter cell have after mitosis and cytokinesis?
A.1.5
B.3
C.6
D.12
Answer:
B. 3
Explanation:
Mitosis is the process of reproduction of somatic/body cells. This means that the number of chromosomes the original (parent) cell started out with, will remain the same for the daughter cells.
Given that if a parent cell has 3 chromosomes before mitosis, then the 2 daughter cells produced will also have 3 chromosomes after mitosis and cytokinesis.
What control mechanisms might prevent cells from producing too much of the amino acid glycine?
Which is a nonrenewable resource? *
cotton
minerals
wool
air
When a person strikes and lights a match, potential energy in the match is transformed into which types of energy?
Answer: Kinetic Energy
Explanation:
Kinetic Energy is energy in motion, while Potential Energy is stored.
Which lake zone has phytoplankton?
A. Limenetic
B. Profundal
C. Benthic
D. Intertidal
Answer:
Option A is the correct one.
Explanation:
limnetic zone
The limnetic zone is the most photosynthetically-active zone of a lake since it is the primary habitat for planktonic species. Because phytoplankton populations are densest here, it is the zone most heavily responsible for oxygen production within the aquatic ecosystem
what happens when a light beam passes from air in water?
A The light speeds up
B all of the light is absorbed
C The light is bent and transmitted
D The light is reflected
Answer:
Refraction
Explanation:
C. The light is bent and transmitted
can someone help me fill this out?
Answer:
I Feel Bad For You My Dude
Identify the transformations of energy that take place in the diagram. Assume the girl in the diagram eats the corn to gain the energy to ride the bike.
Answer:
kinetic and solar energy
Explanation:
hope it helps
Answer: This is it!
Hope this helps
in what way are the digestive system and circulatory systems alike
a:They both perform the same function.
b: they are both structural systems.
c:they are both transport systems.
d:they both involve the same organs
What traits would help a predator be more “fit” to survive in each environment?
The environments it means are a white snowy place and a darker summer place. No links
A predator would likely be more fit if he could blend in with his surroundings, made minimal noise, had good hearing, and could move quickly.
What will make a predator fit in every environment?
Not simply color, but also possibly rough skin, sharp teeth, or claws to ward off predators, could have an impact on an individual's ability to survive.Microevolution (change in allele frequencies) can result via natural selection, with fitness-increasing alleles becoming more prevalent in the population.Reproductive success is measured by physical fitness (how many offspring an organism leaves in the next generation, relative to others in the group).It is the only method of evolution that may continuously lead to populations being more acclimated to, or better suited for, their environments, throughout time.Therefore, natural selection is the phenomenon for survival of the fittest.
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What’s the difference between a primary source and a secondary source?
A primary source was written by someone who actually experienced the event.
The difference is about where the source appears—online or in print.
Primary sources are shorter than secondary sources. The difference is about how closely the source relates to your topic.
PLEASE HELP ME!!!!!!!
Answer:
"A primary source was written by someone who actually experienced the event."
Answer:
"A primary source was written by someone who actually experienced the event."
Explanation:
Clownfish and sea anenome: the clownfish is protected and has a home. The sea
anemone gets nothing in return. What type of relationship is this?
parasitism
commensalism
carry capacity
mutualism
Answer:
mutualism
Explanation:
Cells make up larger pieces such as organs, _____and______.
Each cell performs different ____________.
What is the definition of a cell?
Answer:
Solution given:
Cells make up larger pieces such as organs, __tissues___and__organ systems____.
Each cell performs different functions like;
provide structure for the body, take in nutrients from food, convert those nutrients into energy, and carry out specialized functions.Cell is defined as a basic ,functional and structural unit of life.
Which type of reproduction is shown in the diagram above?
Answer: there’s no diagram…
Explanation:
What part of the excretory system transport urine from the kidneys to the bladder?
Answer:
Ureter
Explanation:
I need help in writing an essay about the rise of global temperatures over the past century
Answer:
Essay about the rise of global temperatures over the past century.
Explanation:
The rise of global temperatures over the past century is the major issue which occurs due to human activities. The use of fossil fuels in vehicles releases huge amount of carbondioxide gas in the air while burning. Carbondioxide gas is a green house gas which blocks the reflected solar radiation to go away in the space. These solar radiation remains in the surface which increases the surface temperature of the earth. This rising in the surface temperature is responsible for the melting of glaciers that leads to the rise of sea level which is a threat for coastal regions. This melting of glaciers also causes floods in the regions so that's why the it is a major issue.
In very dry environments, sand can pile into large dunes.
The wind causes ripples on the surface of the sand.
Fossilized ripples of windblown sand
What do fossilized dunes such as the one shown in the photo tell scientists
about the environment?
A. It was once cold and wet.
B. It used to be a glacier.
C. It used to be an ocean.
OD. It was once dry and windy.
Answer:
D
Explanation:
the picture has ripples and is dry and cracked, hence the envirmoment having to be dry and windy.
Answer:
It was one dry and windy.
Explanation:
Chloroplasts and mitochondria have something in common that supports the theory of endosymbiosis. What is it?
A) Mitochondria and chloroplasts are found in prokaryotes.
B) Mitochondria and Chloroplasts lack a nucleus.
C) Chloroplasts and Mitochondria are the same size as prokaryotes.
D) chloroplasts and mitochondria are similar in size.
Answer: A) Mitochondria and chloroplasts are found in prokaryotes.
Explanation:
Both mitochondria and chloroplasts contain their own DNA and ribosomes. The first endosymbiotic event occurred: The ancestral eukaryote consumed aerobic bacteria that evolved into mitochondria. In a second endosymbiotic event, the early eukaryote consumed photosynthetic bacteria that evolved into chloroplasts.
Darwin specifically studied the
on the Galapogas islands.
A. Finches
B. Flowers
C. Turtles.
D. Insects
Answer:
Explanation:
A. finches
darwin specifically studied the finches
on the galapagos islands.
What activities damage our lungs
Smoke: As we all know, cigarettes include toxic substances that trigger inflammation and destroy the lungs’ structure.1.
Mold: If too much moisture is present, mold can grow and become damaging to your airways. 2.
Chemicals: Inhaling chemical-filled air with things like noxious gas, chlorine, cleaning supplies and more can lead to threatening lung diseases.3.
Dust: Lung tissues can collect dust and particles over time which ends up injuring the airways.4.
Pollution: Not only can breathing in air pollutants cause irritation in your airways, but it also could lead to long-term lung damage.5.
Answer:
smoking and doing drugs
Provide an example of a mutation that has a neutral effect on the organism.
___________ provide neither a beneficial nor harmful effect on ____________
Answer: EXAMPLE:Black bears can carry the mutated gene that produces the white bears.
Explanation:
COLUMN A
1. gametes
2. gonads
3. seminiferous tubules
4. puberty in males
5. testosterone
6. corpus luteum
7. puberty in females
8. atresia
9. human chorionic gonadotropin
10. oxytocin
COLUMN B
a. sperm production
b. endocrine structure
c. produces secondary sex characteristics
d. follicular degeneration
e, reproductive organs
f. indicates pregnancy
8. reproductive cells
h. milk ejection
i. menarche
j. spermatogenesis begins
Answer:
1g
2e
3j
4a
5c
6b
7i
8d
9f
10h
Explanation:
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HELP!!!! ASAP!!!
What is an important function of mitochondria?
A. converting energy from sunlight into chemical energy in ATP
B. converting chemical energy from ATP into chemical energy in glucose products
C. converting energy from sunlight into chemical energy in glucose products
D. converting chemical energy from glucose into chemical energy in ATP
1. John and Aubrey are trying to decide where to go for dinner. John says he wants Chinese. He
knows Aubrey doesn't really like Chinese but he is in the mood for it. Aubrey tells him she'd
rather have something else. John gets agitated and starts telling her she is just being selfish.
Aubrey backs down and agrees to eat Chinese just so he will stop yelling at her. John then kisses
her, smiles, and says, “I knew you loved me". This is an example of an abusive relationship.
O true
false
Answer:
true
Explanation:
Just because he told she's being selfish ext.. lol it's not normal