Answer:
A series of missions to the moons of Jupiter and Saturn has revealed their potential to harbour life. Nina Notman looks to the skies
After a series of mission failures, July 1965 saw the first successful flybys of Mars. The US Mariner 4 became the first spacecraft to take close up pictures of another planet, beaming 22 images of the impact-cratered Martian surface back to Earth. Since then, more than 20 successful missions have explored the red plant’s atmosphere and surface.
Thanks to the images and data collected– and by telescopes, both on earth and in space – we now know that billions of years ago, Mars had the three critical ingredients for life. It had an abundance of the chemical building blocks, liquid water on its surface and an energy source (volcanic activity) to power the chemical reactions that make life possible (on Earth that energy source is the sun). Today, the inhospitable surface of Mars is thought to be unsuitable for life, but the possibility of life existing deep beneath its frozen surface hasn’t been ruled out. To date though, no evidence of life – ancient or otherwise – has been found. Mars being habitable, it turns out, doesn’t mean it actually has a habitat.
Source: NASA/JPL-Caltech/MSSS
Mars has all the ingredients for life – water, chemicals and energy – but no signs of living things yet
The search for Martian life is ongoing, with a further three missions to Mars planned to launch over the next few years. Longer-term, a number of space agencies are also aiming to collect samples from Mars and return them to Earth for more in-depth analysis. And the search for signs of extraterrestrial life is stretching to the depths of our solar system and beyond.
A person who is heterozygous for type B blood has children with a type AB eren Versich
blood type is NOT possible anong thier children?
Type B
Tye A
Type o
Type AB
Roger Sperry cut a newts optic nerve and rotated the eye. Axons from what used to be the dorsal part of the retina (now located on the ventral side) grew back to the target areas: Select one: A. that ordinarily get input from the ventral retina. B. equally and diffusely. C. that ordinarily get input from the dorsal retina. D. that ordinarily get input from the center of the retina.
Answer:
C
Explanation:
that ordinarily get input from the dorsal retina
40. The state of matter with definite shape and definite volume
A. Gas
B. Liquid
C. Solid
Answer:
C. Solid
Explanation:
Gas has no definite shape or volume, and liquid has no definite shape. Hope this helps, best of luck!
Answer:
solid
Explanation:
liquid flow everywhere
gas blow in water
but solid is in fix shape
A group of researchers are monitoring the health of a salt marsh. They
measure high levels of nitrates and phosphates in the sediment of the marsh
but not in the water samples. In this instance, which ecological service is the
marsh providing?
A. coastal land
B. Aquatic habitat
C.Flood protection
D. Water purification
Answer:
It is D
Explanation:
Trust me I've taken it already, and plus it talks about it not being in the water.
In the given instance, the ecological service which is providing the marsh is the water purification. Thus, the correct option will be D.
Ecological services or ecosystem services are the many and varied benefits which the humans are provided or get from the natural environment and the healthy ecosystems. Such ecosystems include, for example, the agroecosystems, forest ecosystem, grassland ecosystems, and also the aquatic ecosystems.
A group of researchers are monitoring the health of a salt marsh. They measure high levels of nutrients in the sediment but not in the water samples. In this instance, the ecological service which is providing marsh is the water purification.
Therefore, the correct option is D.
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How do humans help plants during photosynthesis?
Answer:
Humans breathe out carbon dioxside which plants need to live and grow during the process of photosynthesis.
Explanation:
They do this by a process known as photosynthesis. ... Photosynthesis and respiration are the two essential processes that allow life to sustain on earth. In a way, they are a cycle — plants help humans breathe by providing us with oxygen, and humans help plants "breathe" by providing them with carbon dioxide.
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1.Write the equation for light dependent reaction of photosynthesis
2.Write the Equation for light independent reaction of Calvin cycle?
Answer:
1. The overall chemical equation of the light-dependent reactions is given below:
12 H₂O + 12 NADP+ + 18 ADP + 18 Pi + light and chlorophyll ----> 6 O₂ + 12 NADPH + 18 ATP
2. The overall chemical equation for the light-independent reactions of the Calvin cycle is given below :
3 CO₂+ 6 NADPH + 5 H₂O + 9 ATP → glyceraldehyde-3-phosphate (G3P) + 2 H+ + 6 NADP+ + 9 ADP + 8 Pi
Explanation:
1. The light-dependent reactions convert light energy into chemical energy, producing ATP and NADPH which are used light-independent reactions to drive the synthesis of sugar molecules from inorganic CO₂ and water. Light-dependent reactions takes place in photosystem I and II. Photosystem I and Photosystem II ( PS I and PS II) are the two biochemical systems, active in chloroplasts, that serve as sites of electron transfer reactions in photosynthesis. Energy from sunlight is used to split water which releases electrons and hydrogen atoms which are transferred to NADP+ to produce ATP and NADPH and oxygen is produced as a waste product.
The overall chemical equation of the light-dependent reactions is given below:
12 H₂O + 12 NADP+ + 18 ADP + 18 Pi + light and chlorophyll ----> 6 O₂ + 12 NADPH + 18 ATP. Note that Pi refers to inorganic phosphate
2. The Calvin cycle refers to the light-independent reactions in photosynthesis. It occurs in three stages.
Stage 1 (Carbon fixation): In this first stage of the Calvin cycle, light-independent CO₂ is fixed by enzyme called ribulose bisphosphate carboxylase (RuBisCO) to ribulose bisphosphate (RuBP) to form glyceraldehyde-3-phosphate.
Stage2: ATP and NADPH are used to reduce 3-phosphoglycerate (3-PGA) into glyceraldehyde--phosphate (G3P). ATP and NADPH are used up in the process and are converted to ADP and NADP+, respectively.
Third stage: RuBP is regenerated, which enables the system to prepare for more CO2 to be fixed.
The overall chemical equation for the light-independent reactions of the Calvin cycle is given below :
3 CO₂+ 6 NADPH + 5 H₂O + 9 ATP → glyceraldehyde-3-phosphate (G3P) + 2 H+ + 6 NADP+ + 9 ADP + 8 Pi
In humans, dimples are dominant to no dimples and freckles are dominant to no freckles. A man with
no dimples or freckles mates with a woman who is heterozygous for both traits. Determine the
percentage of their offspring that will have the same genotype as their mother. Also determine the
percentage of their offspring that will have the same phenotype as their father.
Answer:
I'm being honest the answer are in the pdf pls don't report me its not a scam
Explanation:
The correct answer is 25% of their offspring will have the same genotype as their mother.
25% of their offspring will have the same phenotype as their father.
What is genotype?The term genotype refers to an organism's whole complement of genes; in other words, it describes its genetic composition. In a more restricted meaning, the phrase can refer to the alleles, or alternative forms of a gene, that an organism carries.
what is phenotype?A phenotype is just an observable trait. Pheno means observe and is derived from the same root as "phenomenon." As a result, it's an observable sort of organism that can refer to anything from a common characteristic like height or hair color to the presence or absence of a disease.
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Approximately 30% of all solar energy is reflected back into space. If 20% of the incoming solar energy is absorbed into the atmosphere and clouds, how much is absorbed by Earth's surface?
Answer:
50% Will be absorbed by the earth's surface
The Earth has a magnetic field. If you were to use a bar magnet to represent the magnet causing the magnetic field, which representation would be correct? The Earth is shown with curved lines marked by arrowheads, which lead from the south geographic pole to the north. A bar magnet overlaid on Earth has S to the north geographic pole and N to the south. The Earth is shown with curved lines marked by arrowheads, which lead from the south geographic pole to the north. A bar magnet overlaid on Earth has N to the north geographic pole and S to the south. The Earth is shown with curved lines marked by arrowheads, which lead from the south geographic pole to the north. A bar magnet overlaid on Earth has S to the east along the equator and N to the west.
Answer:
A
Explanation:
Answer:
A
Explanation:
which event would most likely lead to a thunder storm
i think the answer is (C)
Explanation:
The warm air becomes cooler, which causes moisture, called water vapor, to form small water droplets - a process called condensation. ... If this happens with large amounts of air and moisture, a thunderstorm can form.
Which of the following factors decrease biodiversity? (Choose all that apply)
a. habitat destruction
b. unpredictable precipitation
c. warm temperatures
d. freezing temperatures
Answer:
habitat destruction, unpredictable precipitation, and freeing temperatures.
Explanation:
i took the quiz
The destruction of the habitat, unpredictable precipitation, and freezing temperatures decreases biodiversity. Thus, options a, b, and d are correct.
What is biodiversity?Biodiversity is the variety of life that sustains on earth and lives in a particular habitat. The biodiversity can be measured based on the ecosystem, species, and genetics. It comprises the ecological and evolutionary process.
The destruction of the habitat of a species can lead to a decrease in biodiversity as it affects the ecosystem and the ecological pyramid as a whole and will affect the population of the species.
The unpredictable precipitation can affect the species and the habitat as it may lead to floods that will destroy the habitat hence resulting in the loss of species.
Similarly, the decrease in temperature will affect many species as they will not be able to cope with low temperature resulting in their death.
Therefore, the unpredictable precipitation, freezing temperature, and destruction of habitat lead to a decrease in biodiversity.
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Can someone do this lab for me?
I don't have the materials or time. Hopefully, someone has done this before so they can give me some general results and observations. Thanks! :)
PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
Answer:
angle PQN and angle ONQ are alternate interior angles
write a paragraph that explains what the causes of Long term climate cycles are. Give examples
Explanation:
Scientists have predicted that long-term effects of climate change will include a decrease in sea ice and an increase in permafrost thawing, an increase in heat waves and heavy precipitation, and decreased water resources in semi-arid regions.
Below are some of the regional impacts of global change forecast by the Intergovernmental Panel on Climate Change:
North America: Decreasing snowpack in the western mountains; 5-20 percent increase in yields of rain-fed agriculture in some regions; increased frequency, intensity and duration of heat waves in cities that currently experience them.
Latin America: Gradual replacement of tropical forest by savannah in eastern Amazonia; risk of significant biodiversity loss through species extinction in many tropical areas; significant changes in water availability for human consumption, agriculture and energy generation.
Europe: Increased risk of inland flash floods; more frequent coastal flooding and increased erosion from storms and sea level rise; glacial retreat in mountainous areas; reduced snow cover and winter tourism; extensive species losses; reductions of crop productivity in southern Europe.
Africa: By 2020, between 75 and 250 million people are projected to be exposed to increased water stress; yields from rain-fed agriculture could be reduced by up to 50 percent in some regions by 2020; agricultural production, including access to food, may be severely compromised.
Asia: Freshwater availability projected to decrease in Central, South, East and Southeast Asia by the 2050s; coastal areas will be at risk due to increased flooding; death rate from disease associated with floods and droughts expected to rise in some regions
Which is NOT a benefit of xenophyophores in a habitat?
1 They maintain benthic biodiversity.
2 They increase populations of isopods, mollusks, and crustaceans.
3 They churn up sediments that build up on the ocean floor.
4 They convert salt and iron into energy and nutrients.
The correct answer is 4. They convert salt and iron into energy and nutrients.
Explanation
Xenophiophores are large single-celled organisms generally found deep in the deep sea. They are characterized by being very delicate organisms, which makes it difficult for scientists who intend to study them since they are easily damaged by manipulation. However, in the studies that have been carried out on these organisms, it has been found that they are irreplaceable agents in the sediment deposition process and the maintenance of the biological diversity of benthic organisms. Also, it has been shown that in the areas where these organisms are found there are three to four times more benthic crustaceans, echinoderms, and mollusks than the equivalent areas not inhabited by these organisms. On the other hand, none of these studies has proven that They convert salt and iron into energy and nutrients. Therefore, the correct answer is 4. They convert salt and iron into energy and nutrients.
PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER.
Answer:
i think its A im sorry if it isnt but im pretty sure its A but it might be wrong
Explanation:
To determine the rate of fermentation I will ?
Answer:
The rate of fermentation can be measured by placing a small amount of yeast and sugar solution in a fermentation tube. ... The fermentation rate of the yeast can be calculated by measuring the volume of CO2 at the top of the tube and dividing it by the amount of time it took for that volume to form
How does adaptation affect organisms?
View the slides on the PowerPoint to match each of the cell structures with the correct letter labels for each of the following cells. Elodea Cell Cell wall _____ Chloroplast ____ Area of vacuole ___ Onion Cell Cell wall ___ Nucleus ___ Mitochondria ___ Cheek Epithelial Cell Cell membrane ___ Nucleus ___ BacteriA Bacterial Cells. View the bacterial cells on the PowerPoint and identify which cell (A, B, or C) is: Coccus ____________ Bacillus ____________ Spirillum ____________ Protista Amoeba can move via the extension of finger-like projections called pseudopodia, what prevents plant cells from moving in the same fashion? How does the euglena compare to both plant and animal cells (i.e. - explain what structure(s) might make it similar to plants and what structures might make it similar to animals).
Answer:
10. View the slides on the PowerPoint to match each of the cell structures with the correct letter labels for
each of the following cells.
Elodea Cell Cell wall _B____ Chloroplast _A___ Area of vacuole _C__ Onion Cell Cell wall _B__ Nucleus __A_ Mitochondria _C__ Cheek Epithelial Cell Cell membrane _B__ Nucleus __A_ BacteriA Bacterial Cells. View the bacterial cells on the PowerPoint and identify which cell (A, B, or C) is: Coccus ________B____ Bacillus ______A______ Spirillum ______C______ Protista Amoeba can move via the extension of finger-like projections called pseudopodia
Explanation:
Amoeba can move via the extension of finger-like projections called pseudopodia, what prevents plant cells from moving in the same fashion?
Ans: The plants that prevent the information of pseudopodia have rigid cell walls. which is unlike to amoeba.
How does the euglena compare to both plant and animal cells (i.e. - explain what structure(s) might make it similar to plants and what structures might make it similar to animals).
Ans: Euglena are similar to plants because they both have chloroplast and are similar to animals because neither has a cell wall.
How can a poly genic trait be easily identified
Answer: The presence of the polygenic trait masks the other possible alleles involved. There are only two possible phenotypes for the trait. The graphing of the possible phenotypes results in a bell curve. Usually, traits are polygenic when there is wide variation in the trait. For example, humans can be many different sizes. Height is a polygenic trait, controlled by at least three genes with six alleles. If you are dominant for all of the alleles for height, then you will be very tall.
Explanation:
T cells react mainly to antigens that are dissolved in plasma
Answer: Yes
true i believe so
Mechanical weathering is commonly the result of all of the following except _____.
wind
plant disturbances
gravity
humans
ice
animal disturbances
running water
chemical reactions
Answer:
The diagram represents the process of enlarging a rectangle using a scale factor of 3. The width of the original rectangle must be:
9 in.
11 in.
12 in.
17 in.
Explanation:
At the equator, what kind of pressure will you most likely find?
Which one ??????????????
Answer:
It allows genetic variation
Explanation:
An immunodeficiency condition called bare lymphocyte syndrome is caused by a genetic defect that results in an inability to synthesize MHC class II molecules.
a. True
b. False
Answer:
True
Explanation:
This is because lymphocyte syndrome is a genetic condition where there is absence of or in ability of the cell to express histocompatibility complex class II or MHC class II and this lead to incapability of the immune system to fight infections. The immune system is compromised and weakened to fight infections.
The frequency of genes that lead to favorable traits increases because
A.
favorable traits always start out as the rare form and become more common
B.
the genes for favorable traits are dominant over those for unfavorable genes
C.
Both B and D
D.
those genes continue on to the next generation when the individuals that contain the genes successfully survive and reproduce
Answer:
The answeer is both B and D.
which fish is exotic in among these common carp or mori or thaila?
Answer:
common carp
Explanation:
Given that Exotic fishes are a type of fishes that being raised in an environment that is not native to them. Usually, exotic fishes are known for surviving easily in a country that is not originally their own.
Among the available options, COMMON CARP is a type of fish that is known for its exotic nature. So far, it has been introduced to other continents and countries other than their country of origin.
They easily reproduced and multiply, thereby easily adapt and populate their new environment.
steps of photosynthesis
Answer:
The Six stepls of Photosynthesis
1. When Leaves open their pores which is known as stomata.
2. Sunlight enters in the leaves through open pores.
3. Sunlight absorbed minerals from Carbon dioxide and water.
4. Absorbed minerals converted into glucose.
5. Glucose will change in green color pigment known as cholorophyll.
6. This process may also convert carbon dioxide into oxygen.
Juan is making a chart to organize his notes about centipedes.
Which best completes the chart?
tear plants
dig
squirt liquid
inject poison
Answer:
inject poison
Explanation:
edge2021
Answer:
D
Explanation:
The 2011 earthquake triggered a ... Question 3 options: hurricane volcano tsunami sand storm