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eText: Ecological Footprints
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rth Day Every Day
What were some of the environmental problems that inspired Earth Day?
Oil spills, polluting factories and power plants, raw sewage, toxic dumps, pesticides, freeways, the loss of wilderness and the extinction of wildlife
HELPPP ASAP !! how are different natural disasters related? what different causes and effects do you know about?
Please Help with both. Will make sure to Mark You Brainliest & Thank your comment.
Thank You. (:
Answer:
2nd 1 is because the letters are caps
1st 1 is more common
Explanation:
What evidence did Wallace claim shows
that new species are modified forms of
old species?
Answer:
Read Below
Explanation:
Wallace is often referred to as the father of modern biogeography. 6. The finger bones inside manatee and whale flippers are evidence that these living species are modified forms of older species.
What ratio of plants in the offspring would you predict from a Yy x Yy cross?
Answer:
The correct answer is -
The genotype of offspring - 1:2:1 (YY:Yy:yy)
The phenotype of offspring - 3:1 (dominant trait: recessive trait)
Explanation:
In this question, it is stated that there is a cross between Yy and Yy. By the genotype of the parents, we can say that Y is dominant for a particular trait and y is recessive and the parents are in the heterozygous condition in this cross. The gametes these parents will produce are - Y and y and Y and y
then the cross of Yy and Yy would be -
Y y
Y YY Yy
y Yy yy
Offspring from this cross are YY, Yy, Yy, and yy which means the genotypic ratio is - 1:2:1 and the phenotypic ratio is - 3:1 as three out of four are dominant.
Explain how the data supports your hypothesis.
If needed, you can change your poison selection (above).
Answer: It is verified by testing it. If the data supports the hypothesis, then we consider the hypothesis to be verified and true. If however, the data does not support the hypothesis or refutes it, then the hypothesis is in trouble, and we have to come up with a different hypothesis to explain the observations.
Explanation:
A zygote (the cell formed when an egg and a sperm cell initially fuse) is:
A) multipotent
B) pluripotent
C) totipotent
D) omnipotent
Answer: https://rb.gy/rb1nlh copy that into search browser
Explanation:
Help plz
Which statement best describes the flow of energy and the movement of chemical compounds in an ecosystem?
Energy flows out of living organisms and is lost, while chemical compounds remain permanently inside organisms.
Energy is transferred from organism to organism in a food chain, and chemical compounds are recycled
Energy flows into living organisms and remains there, while chemical compounds are transferred from organism to organism.
Chemical compounds flow in one direction in a food chain and energy is produced.
Answer:
This is because in biology, energy is transferred from organism to organism and some energy is lost along the way. Each energy transfer results in a loss of energy, so that energy is always at a lower level and can never be returned to its original high energy level. On the other hand, chemical elements can form products, then that reaction can be reversed and break back down into reactants. Additionally, the law of conservation of matter says that matter can't be created or destroyed, only transferred from one form to another.
Answer:
C
Explanation:
Energy flows while matter cycles
How does a mouse obtain energy for everyday functions? How might this look different compared to how an own obtains energy?
Answer:
A mouse would obtain energy from plants that have vitamins and minerals, and protein from things like nuts. An owl would get protein from eating a mouse and vitamins and minerals from the things the mouse ate.
Explanation:
It's all one big circle. These nutrients would provide the energy needed to perform everyday tasks.
NEED HELP ASAP!!!!!!!!!!!!
Answer:
It's most likely to be D.
Explanation:
Hope this helps.
Explain how errors in DNA replication and environmental factors cause genétic variation
DNA replication is a truly amazing biological phenomenon. Consider the countless number of times that your cells divide to make you who you are—not just during development, but even now, as a fully mature adult. Then consider that every time a human cell divides and its DNA replicates, it has to copy and transmit the same sequence of 3 billion nucleotides to its daughter cells. Finally, consider the fact that in life (literally), nothing is perfect. While most DNA replicates with fairly high fidelity, mistakes do happen, with polymerase enzymes sometimes inserting the wrong nucleotide or too many or too few nucleotides into a sequence. Fortunately, most of these mistakes are fixed through various DNA repair processes. Repair enzymes recognize structural imperfections between improperly paired nucleotides, cutting out the wrong ones and putting the right ones in their place. But some replication errors make it past these mechanisms, thus becoming permanent mutations. These altered nucleotide sequences can then be passed down from one cellular generation to the next, and if they occur in cells that give rise to gametes, they can even be transmitted to subsequent organismal generations. Moreover, when the genes for the DNA repair enzymes themselves become mutated, mistakes begin accumulating at a much higher rate. In eukaryotes, such mutations can lead to cancer.
How are alleles represented in genetics?
Biologists refer to dominant alleles as uppercase letters and recessive alleles as lowercase letters when referring to genotype.
What are alleles?Genetics and evolution define an allele as a variant of the same sequence of nucleotides at the same location on a lengthy DNA molecule.
The variant DNA sequences at a locus are known as alleles, and the chromosomal or genomic location of a gene or any other genetic element is referred to as a locus.
Alleles can be identified using just one capital or lowercase letter, two, three, or more letters, or letter/number combinations. Superscripts, subscripts, or both may be present in alleles.
Alleles that are recessive are denoted by lowercase letters, while dominant alleles are denoted by capital letters.
Thus, this way, the alleles are represented.
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Which of these is MOST descriptive of a compartmentalized cell?
What does a phylogenetic tree represent?
Answer:
A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.
Answer:
A phylogenetic tree, also known as a phylogeny, is a diagram that depicts the lines of evolutionary descent of different species, organisms, or genes from a common ancestor.
Explanation:
Tsunami waves are caused by earthquakes in the ocean floor. As the waves approach the shore, they usually grow in height. When this occurs, which aspect of the wave is changing?
A.
amplitude
B.
direction
C.
frequency
D.
speed
E.
wavelength
Answer:
LETTER A. AMPLITUDE
Explanation:
Got it right on the test
What type of bond holds the nitrogen bases together across the DNA's two
strands of nucleotides? *
Covalent
Peptide
Nitrogen
lonic
O Hydrogen
Answer:
Hydrogen
Explanation:
2 between A-T and 3 between G-C
Global warming could happen without the greenhouse effect
True or False
Answer:
false
Explanation:
please mark brainliest
.
What is one reason why plants can grow in the tundra?
the ability to grow tall
a thin layer of active soil
a thick layer of permafrost
a ten-month long summer
Answer:
im not sure but i think it is (a thick layer of permafrost ) sorry if im wrong
Explanation:
Answer:
a thin layer of active soil
Explanation:
The tundra’s ground has a thin layer of active soil that thaws during summer. Because of this, plants can grow.
Can you help me with both
Answer:
8. decisions
9. studied
HELP!!!! BIOLOGY!!!! 50 POINTS!!!!
A species of frog slowly dies off when its main food source migrates to another area. Migrating toads and lizards begin to expand to the region. This is an example of (3 points)
remaining species living longer due to increased food supply
surviving populations reaching a state of equilibrium due to decreased competition
surviving species exploiting a newly available niche
organisms evolving more slowly as they recover from the loss of diversity
I think is C
Answer:
C
Explanation:
C states that the surviving species exploite a newly available niche. When an animal migrates is trying to find food or more livable conditions. C is true because migrating usually occurs when animals want to find other new places to fit their circumstances or living conditions.
This is an example that states how the surviving species exploit a newly available niche (Option C).
What is a species niche?In biology, the term niche refers to the match between the features of a given species and particular environmental conditions.
The species niche is also used to describe the ecological role of a given species in an ecosystem.A species niche includes both biotic factors (e.g. competition relationships) and abiotic factors (e.g. temperature tolerance).In conclusion, this is an example that states how the surviving species exploit a newly available niche (Option C).
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7. How is parasitism different from other types of symbiosis?
17. Identify How would the
shuttle's motion change if
there were no gravitational
force between it and Earth?
Answer:
Gravity is one of those things we take completely for granted. And there are two things about it that we take for granted: the fact that it is always there, and the fact that it never changes. If the Earth's gravity were ever to change significantly, it would have a huge effect on nearly everything because so many things are designed around the current state of gravity. Before looking at changes in gravity, however, it is helpful to first understand what gravity is. Gravity is an attractive force between any two atoms. Let's say you take two golf balls and place them on a table. There will be an incredibly slight gravitational attraction between the atoms in those two golf balls. If you use two massive pieces of lead and some amazingly precise instruments, you can actually measure an infinitesimal attraction between them. It is only when you get a gigantic number of atoms together, as in the case of the planet Earth, that the force of gravitational attraction is significant. The reason why gravity on Earth never changes is that the mass of the Earth never changes. The only way to suddenly change the gravity on Earth would be to change the mass of the planet. A change in mass great enough to result in a change in gravity isn't going to happen anytime soon.
Explanation:
But let's ignore the physics and imagine that, one day, the planet's gravity turned off, and suddenly there was no force of gravity on planet Earth. This would turn out to be a pretty bad day. We depend on gravity to hold so many things down -- cars, people, furniture, pencils and papers on your desk, and so on. Everything not stuck in place would suddenly have no reason to stay down, it would start floating. But it's not just furniture and the like that would start to float. Two of the more important things held on the ground by gravity are the atmosphere and the water in the oceans, lakes, and rivers. Without gravity, the air in the atmosphere has no reason to hang around, and it would immediately leap into space. This is the problem the moon has -- the moon doesn't have enough gravity to keep an atmosphere around it, so it's in a near-vacuum. Without an atmosphere, any living thing would die immediately and anything liquid would boil away into space. In other words, no one would last long if the planet didn't have gravity. If gravity were to suddenly double, It would be almost as bad, because everything would be twice as heavy. There would be big problems with anything structural. Houses, bridges, skyscrapers, table legs, support columns, and so on are all sized for normal gravity. Most structures would collapse fairly quickly if you doubled the load on them. Trees and plants would have problems. Power lines would have problems. The air pressure would double and that would have a big effect on the weather. What this answer shows you is just how integral gravity is to our world. We can’t live without it, and we can't afford to have it change. It is one of the true constants in our lives!
Blood types;
A man with type O marries a woman with type AB.
Several children were born.
1. What is the genotype of the man?
2. What is the genotype of the woman?
3. True or false? the mother of the man had type AB blood.
4. Could the mother of the woman have type O blood?
5. what fraction of offspring would have type B blood?
6. what fraction of the children would have type AB blood?
7.Could this couple have a child with type O blood?
Answer:
A genotype is an organism's complete set of genetic material. Often though, genotype is used to ... If she mated with a man with haemophilia (another carrier) there would be a 75% chance of passing on the gene. A punnett square showing a ...
Explanation:
One concept that supports the theory of evolution states that organisms best adapted for survival are the ones that will reproduce and pass traits on to future generations.
Adaptations that can be passed on do not include
A) The basic structure of the organism
B) the reflex actions of the organism
C) the manner in which the organism carries out respiration
D) techniques for hunting food taught by the parents of the organism
Researchers used DNA sequencing techniques to find similarities of Hox genes in roundworms, arthropods, mollusks, echinoderms, cephalochordates, and vertebrates. What did they find out about these genes? Select all that apply. A. Hox genes provide information about evolutionary relationships. B. Similarities among Hox genes suggest that they all arose from a single ancestral gene that duplicated many times. C. Hox genes are regulatory genes that determine body plans of animals. D. Only some animals that have been tested have Hox genes, suggesting that Hox genes have no function and only evolved recently.
Answer:
(B) Similarities among Hox genes suggest that they all arose from a single ancestral gene that duplicated many times.
Explanation:
Hox genes are arranged in clusters and their order on the chromosome is the same as the order in which they are expressed along the body during development.
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Wildfires can be beneficial because they allow ecosystems to______.
According to this diagram, which line color denotes the universal common ancestor for all 3 domains of life?
A. Blue
B. Red
C. Tan
D. Black
Which of the following invertebrates is most closely related to the vertebrates? Select all that apply.
1. echinoderms
2. cnidarians
3. arthropods
4. chordates
Answer:
I would say chordates. (Not absolutely sure so double check)
Explanation:
Chordates have a dorsal nerve cord, which is super close to a spinal cord. (Which vertebrates have.)
Answer: Echinoderms
Explanation:
The Echinoderms deuterosomes mouth development and bilateral symmetry in the larval stage lead some scientists to believe that they are the closest to vertebrates.
The figure below shows a food chain that might exist in a meadow.
Meadow Food Chain
Owl
Green plants Beetle
Toad
Snake
Which organism is the primary consumer in this food chain?
А
owl
B
toad
с
beetle
plant leaf
Summarize what causes an earthquake to occur.
Answer:
Tectonic plates moving
Explanation: