Answer:
Archaea and Bacteria lack a membrane-bound nucleus.
Explanation:
Archaea, bacteria lack a membrane-bound nucleus. Meaning, they are both prokaryotes. Eukaryotes and Animalia are the opposite. They have membrane-bound nuclei.
The nucleus is not membrane-bound in either the domain archaea or the domain bacteria, hence option A is correct.
What are prokaryotes?Single-celled creatures known as prokaryotes are found in the Bacteria and Archaea domains. Prokaryotic cells lack organelles, have no nucleus, and are significantly smaller than eukaryotic cells.
Archaeal cells, like other living things, have an exterior cell membrane that acts as a defense against the environment of the cell.
The cytoplasm, which is part of the membrane and contains the archeon's DNA, is where its life processes are carried out.
They contain a plasma membrane, ribosomes, and cytoplasm, in contrast, bacteria do not have cell membranes.
Therefore, the prokaryotic category of organisms includes bacteria, which are unicellular, hence option A is correct.
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What is the advantage to the sphinx moth Xanthopan morgani by having an 8-inch long tongue?
A) It is used to attract mates through sexual selection
B) It can only pollinate one type of flower
C) It makes flying more efficient
D) It can be used to capture other flying insects for food
E) It can reach nectar that no other pollinator can reach
Answer:
The correct answer would be : option E.
Explanation:
Sphinx moth Xanthopan morganai is montypic genus of sphinx moth which has only one species which gives it as a name of morgan's sphinx moth found in east Africa and Madagascar.
This species of moth have a 8 inch long tongue which is characteristic feature of the species. The 8 inch long tongue gives them advantage in reaching to the nectar where no other pollinator can reach to their.
Thus, The correct answer would be : option E.
The ultimate source of heat in the process of global warming is
A) the burning of fossil fuels
B) carbon dioxide
C) the sun
D) greenhouse gases
It’s either C or D.
Answer: I think it's D. Let me know if it's right.
Fish breathe underwater through gills that remove dissolved oxygen from the water. What phenomenon allows oxygen to dissolve in water
Answer:
The correct answer is "aeration".
Explanation:
Fish depend on the presence of dissolved oxygen in the water to breathe, because they take oxygen from water in a mechanism known as countercurrent exchange. Oxygen gets dissolved in water when winds stirs it in a phenomenon known as aeration. Aeration brings water and oxygen in direct contact, and not only is responsible of producing dissolved oxygen in water, but also increases its palpability by removing its flat taste.
8. Which of the following groups is/are monophyletic? A. prokaryotes B. protists C. non-vascular plants D. seed plants E. all of the above
seed plants are monophyletic
water has an unusually high heat of vaporization (-40+kj/mol), allowing it to be used for evaporative cooling. what do you think would happen if a different compound was used for evaporative cooling - for example, methane (-8kj/mol)
Answer:
A lesser amount of heat will be drawn up from the mass to be cooled per unit mole of the new liquid vaporized, compared to the amount of heat that will be drawn by vaporizing a unit mole of water. For the case of methane, five mole of methane needs to be vaporized to get the same cooling effect of a mole of water.
Explanation:
For a liquid like water to vaporize, it must draw a certain amount of energy from the surrounding in order for some of its molecules to gain enough energy to break out of the surface of the liquid as gas. If the heat of vaporization of water is about -40 kJ/mol, it means that for a mole of water to change from liquid to gas, it must draw up 40 kJ worth of heat from its surrounding. The effect is that the surrounding mass losses 40 kJ worth of heat, and cools down. If we should now use a new liquid, say methane with heat of vaporization of about -8kJ/mol, five moles of methane needs to be vaporized to get the same cooling effect of vaporizing a mole of water; since the heat that will be drawn by a mole of the methane is just bout 8 kJ.
If a mutation in DNA caused a new amino acid sequence to occur, what might happen to the subsequent protein?
The amino acids contain R groups that interact with each other creating a three - dimensional structure. This higher - order structure decides the biological activity of that protein. if the wrong amino acid joins the polypeptide chain the higher - order structure will change, effecting the functioning of the protein.This will lead to many diseases such as sickle cell anemia is most common.
- A housefly lays 100 eggs and each egg hatches into a
larva.
Is asexual or sexual reproduction
Answer:
It's asexual or sexual reproduction.
Answer:
sexual reproduction
Explanation:
Houseflies need a partner to lay eggs. The eggs do not come from the sky.
Cholera spreads through
Polluted air
Mosquito bite
Polluted water
Dog bite
Answer:
it spreads through polluted water.
Explanation:
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Cholera is a water-borne disease spread through polluted and stagnant water bodies. It is caused by a bacteria named Vibrio cholerae by the help of the vector 'Water'.
Hence it is advised to consume boiled and purified water, clean the nearby water bodies and not letting them go stagnant. Always preferred: Hygiene and Sanitation.
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Which of the following are correct regarding carbohydrates? SELECT ALL THAT APPLY They are the preferred energy source of cells. Polysaccharides are long chains of glucose molecules. They are hydrophilic. They contain energy in carbon–carbon bonds.
Answer:
They are the preferred energy source of cells.
Polysaccharides are long chains of glucose molecules.
They are hydrophilic.
They contain energy in carbon–carbon bonds.
Explanation:
Carbohydrates are one of the four biomolecules found in living systems. They are molecules made up of carbon, hydrogen and oxygen in their structures. A monosaccharide is the simplest unit of a carbohydrate. Carbohydrates are energy sources since they store energy in their chemical bonds i.e. carbon-carbon bonds.
They are preferred as energy sources by cells due to the fact that their stored energy can be released quickly for use by cells i.e. easily broken down compared to lipids.
Polysaccharides (large chains of carbohydrate) such as starch etc. are composed of long chains of monosaccharide units such as glucose. Due to the hyroxyll group in the structure of carbohydrates, they are considered water-loving or hydrophilic.
What cell organelle stores water for plant cells
Answer:
vacuoles
Explanation:
Why do you think the whitefish blastula was chosen rather than a sample of adult tissue to view on a slide
Answer:
Explanation:
Blastula is an early stage of embryo development, it is the continuation of t morula which is when the zygote is moved to uterus.
Cells in blastula are actively dividing as formation is still taken place, and are used because this dividing cells are very large and can be easily seen. The chromosomes of Blastula are also more visible than human chromosomes hence necessitates it uses.
the layer of gases that surround earth is called
Answer:
Greenhouse gasses
In _____________ selection, individuals with both extreme forms of a trait are at a selective advantage.
Answer:
disruptive/diversifying selection
Explanation:
Disruptive (also known as diversifying) selection is a type of natural selection where extreme phenotypic values are more favored rather than intermediate phenotypes. The disruptive selection favors the survivance and reproduction of organisms with extreme phenotypic traits, and in turn impairs the reproduction of organisms with intermediate traits, thereby changing the allele frequencies in the population in order to favor extreme values. An example of disruptive selection is the beak size of Galapagos finches, where extreme phenotypes of this trait have shown to be adaptive according to the type of food found in each island.
What experimental evidence supports the fluid mosaic model of biomembranes?
Answer:
There are many experiments available: Freeze-fractue experiment is one of them.
Explanation:
The fluid property of functional biological membranes had been determined through labeling experiments, x-ray diffraction, and calorimetry.
experimental evidences for the "mosaic" and "fluid" property of layers of mosaic fluid model -
- Freeze-fractue experiment the layer and watch protein.
- An significant experiment that gave proof supporting liquid and dynamic natural was performed by Frye and Edidin.
-They utilized Sendai virus to drive human and mouse cells to combine and create a heterokaryon and showed that proteins of both human and mouse remains segregated to isolate parts of the heterokaryon a brief time frame after cell combination. However, the proteins inevitably diffused and after some time the outskirt between the two parts was lost.
- Lowering the temperature eased back the pace of this diffusion by making the layer phospholipids progress from a liquid to a gel stage.
- Singer and Nicholson supported the consequences of these tests utilizing their liquid mosaic model.
How we supposed to do this?
An organism composed of one or more cells that contain internal membrane-bound structures ; usually multicellular.
Answer:
its called multicelluar organism
Explanation:
What is the most likely pathway for root cells to obtain energy and identify the organelles involved
Answer:
By breaking down glucose made in photosynthesis with the mitochondria.
Explanation:
Root's cannot undergo photosynthesis but sugar can be transported to the roots through the phloem. Once sugar gets to the root cells, cellular respiration can break down sugar into energy. Cellular respiration starts with glycolysis which occurs in the cytoplasm but the process completes in the mitochondria.
Cells in the roots of plants get their energy through a vascular transportation system within the plant by vessels called phloem.
The energy is produced through photosynthesis and converted to useable energy form by cellular respiration.
Plant veins transport water, nutrients, and energy to the rest of the plant. Plants absorb water and nutrients through their roots and make glucose and transport energy, they use their vascular system to move the water and nutrients up into the rest of the plant and to the roots from leaves.
Plants cells convert light energy or radiant energy to glucose which is transported to the various parts of the plant to provide it as fuel for their functions with help of chloroplast.Phloem is one of the vessels that helps in the transportation of sugar or glucose from leaves to the rest of the plant body including roots.In roots, these glucose molecules are converted to ATPs by the process called cellular respiration within the mitochondria.Thus, the correct answer is - veinous transport system.
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1. All living organisms need to have
(20 points)
organs
O a heart
cells
a brain
Answer:
cells
Explanation:
all living organisms need to have cells
PLEASE ANSWER ASAP IM TIMED
The independant variable is the amount of fertilizer.
The dependant variable is the growth rate.
Constants: would be the amount of fertilizer and the amoun tof water used.
Control group: would be for example would be if there was a separate experiment
hope this helps :)
I need these fast only answer if you no them, please
Answer:
Explanation:
1. Interstellar Medium
2. around 13 billion years
3.telescope
4. the inner planets have low gravity and cannot attract rocks to their atmosphere.
5. oceans, groundwater, freshwater.
6. Solar Nebula, Circumstellar Disks, Planetesimals, Terrestrial Planets (Inner
Solar System), Gas Giants (Outer Solar System)
7. Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune
8. its a circular loop around the sun.
9. The carbon dioxide traps most of the heat from the Sun.
10. saturn
11. molten heavy-metal core, few moons and topological features such as valleys, volcanoes and craters.
12. no solid surfaces and are essentially large balls of gas composed primarily of hydrogen and helium.
13. eight
14. , new moon, waxing crescent, first quarter, waxing gibbous, full moon, waning gibbous, third quarter and waning crescent
15. the Moon has phases because it orbits Earth, which causes the portion we see illuminated to change.
16. the earth
17.total lunar
18.Waxing Gibbous Moon.
19. synchronous rotation.
20.Turbulent Beginnings.
21. closest: perigee farthest: apogee
22.the Moon is lined up between the Earth and the Sun. We see the side of the Moon that is not being lit by the Sun
23. where its facing
25. Lithosphere, Asthenosphere, Mesosphere, Outer Core, and Inner Core. (put these down starting with inncer core to lithosphere.)
26. metal—specifically, iron and nickel
27.Earth is the only planet in the solar system with an atmosphere that can sustain life.
28. Continental crust
29. mantle
30. temperatures increase exponentially.
good luck :)
if you dont take care of your body who will...plz give real answers i really need help
Answer:
we don't care our body our body loss hormone and antibiotic so we live a wastage life because we have no energy....
The correct spelling for the term that means pertaining to the tail is:_____.a) cadal.
b) cadaul.
c) caudle.
d) caudal.
The answer is D. Caudal
Which of the following is a basic requirement for evolution by natural selection to work? A. Individuals must reproduce at a rapid rate. B. Each population must be small in size. C. A population must have some genetic variation. D. All of the above.
Answer:
D
Explanation:
The primary differentiating feature between protists and all other members of Eukarya is that protists are _____.
Answer:
Unicellular
Explanation:
Protists can be defined as a group of eukaryotes that can not be regarded as fungi, animals or plants. These type of organisms are known to be very diverse. They are mainly microscopic in nature and are also known to possess a single cell. That is they are unicellular.
This unicellular attribute is the primary or main differentiating feature between protists and other eukarya.
what does it mean that a hypothesis must be "falsiable" in order to be valid
Answer: A falsifiable Hypothesis is able to be proven wrong from one observation
Explanation:
Which physiological or biological processes occur in the body through fluid dynamics? [Select all that apply]
circulation
respiration
lymphatic flow for multiple chose
Digestion
Urination
What kind of substances tend to be acidic and what kind of substances tend to be alkaline?
Answer:
Substances
0 (most acidic) Hydrochloric acid (HCl)
1 Stomach acid
2 Lemon juice
3 Cola, beer, vinegar.
Examples of alkaline are:sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide etc
Which of the following types of membrane is associated with the skin?
A. Peritoneum
B. Synovial
C. Serous
D. Cutaneous
Answer:
the answer is D. Cutaneous
Explanation:
The cutaneous (ku-ta'ne-us) membrane is your skin. Its superficial epidermis is composed of a stratified squamous keratinizing epithelium. The underlying dermis is mostly dense (fibrous) connective tissue. Unlike the other epithelial membranes, the cutaneous membrane is exposed to air and is a dry membrane.
The type of membrane that is associated with the skin is cutaneous. Therefore, option (D) is correct.
What is cutaneous membrane?Cutaneous membrane is a type of epithelial membrane that covers and protects the external surface of the body, including the skin, hair, and nails. The other options mentioned are different types of membranes found in the body.
Peritoneum is a serous membrane that lines the abdominal cavity and covers the abdominal organs. Synovial membrane is a connective tissue membrane that lines the cavities of freely movable joints. Serous membrane is a type of epithelial membrane that lines the closed body cavities and covers the organs within those cavities.
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true or false evolution but natural selection leads to structures that are perfectly functional solutions
ANSWER: TRUE
natural selection does lead to perfectly functional solutions.
Which of the following is not a true statement regarding the genetic code?
A. The genetic code is nearly universal, with only a few minor exceptions.
B. The genetic code is nonoverlapping.
C. The genetic code is degenerate.
D. The genetic code is triplet-based.
E. Each codon represents a different amino acid.
Answer:
E. Each codon represents a different amino acid.
Explanation:
The genetic code refers to the set of rules guiding the translation of nucleotide bases in DNA or RNA into an amino acid sequence (proteins). The genetic code contains all the codons in the genome, which is a group of three nucleotide base (triplet-based). Each codon species a particular amino acid, however, more than one codon can code for a particular amino acid. This characteristics of the genetic code is called DEGENERACY.
The genetic code is said to be nearly universal because the same codon encodes the same amino acid in almost all living organisms with only few exceptions. The nonoverlapping nature of the genetic code refers to the fact the three bases of a codon are read independently from the bases of another codon i.e. codons do not overlap.
A codon represents one amino acid but more than one codon can represent the same amino acid. Hence, option E is untrue