In a study published in the journal Nature, scientists studied eight ponds in Florida: four that were populated by a species of fish and four that were not. As they studied the ponds, they noted that the areas around the four fish-populated ponds showed decreased populations of dragonflies and dragonfly larvae, whereas the four without fish showed abnormally large populations of dragonflies and larvae. Dragonflies feed on bees, butterflies, and other pollinators.
Predict what would happen to the rate of pollination of flowers in a field next to a pond with no fish. Use evidence to support this prediction. Identify the keystone species in this scenario and explain how you have inferred this.
Answer:
Explanation:
The rate of pollination in the field (near the pond with no fish) will decrease exponentially. Because, as the fish population is removed from that ecosystem, the population of dragonflies and larva increases without check because, fish feeds on the dragonflies larva and kept there population in check. Due to this, the population of bees and other pollinators population decline becuase, they are major food source of dragonflies.
Honeybees are the keystone species because it's absence will lead to major changes in the ecosystem.
i need 2 example each for connective of tissues, Epithelial, muscle and nervous
Answer:
Connective tissue adipose, cartilage, bone.
Epithelial epidermis, the outermost layer of the skin.
Muscle skeletal, cardiac, and smooth.
Nervous neurons and neuroglia
What if these groups is the smallest of the classification
In humans, the condition for normal blood clotting (H) dominates the condition for non clotting (hemophilia) (h). Both alleles are linked to the X chromosome. A male hemophiliac marries a woman who is a carrier for this condition. (In this respect, a carrier is a woman who has an allele for normal blood clotting and an allele for hemophilia.) If they have a son, what are the chances he will be normal for blood clotting
Answer:
The correct answer would be - 50%.
Explanation:
Hemophilia is a sex-linked recessive disorder that takes place in males more than in females as females have two X chromosomes so if one is affected other still able to make clotting factors but in males, there are only one x chromosome.
If a hemophilic man XhY marries with a carrier women XHXh then the chances of their son for normal blooding would be :
Gametes:
Male: Xh and Y
Female: XH and Xh
Then cross:
Xh Y
XH XHXh XHY
(carrier daughter) (normal son)
Xh XhXh XhY
(hemophilic daughter) (hemophilic son)
Thus, the chances of normal son is 50% among sons
What is Air pressure on a clear cloudless day
What would happen if the termination sequence was skipped or not read?
Answer:
Transcription is an essential step in using the information from genes in our DNA to make proteins. Proteins are the key molecules that give cells structure and keep them running. Blocking transcription with mushroom toxin causes liver failure and death, because no new RNAs—and thus, no new proteins—can be made.^2
2
what goes up when the rain goes down ?
Answer:
Umbrella goes up when rain comes down.
Answer:
UMBRELLA
Explanation:
Umbrella goes up when rain comes down.
HAVE A GOOD DAY
The highlighted structure is a tract that connects the ___. The highlighted structure is a tract that connects the ___. hypothalamus and epithalamus hippocampus with the hypothalamus amygdala and the cingulate gyrus None of the choices is correct.
Answer:
The highlighted structure is a tract that connects the hypothalamus and epithalamus .
Explanation:
The given highlighted structure is a optic chisma or optic chiasma.
OPTIC CHISMA- The optic chiasm is an X-shaped structure created in the brain by the crossing of optic nerves. The brain and the eye are connected by the optic nerve. The optic chiasm is considered to be a pivotal point of evolution by biologists. The crossing and uncrossing optic nerve fibers that pass through the optic chiasm are thought to have evolved to help with binocular vision and eye-hand coordination.
Nerve fibers from half of each eye pass over to the opposite side of the brain at the optic chiasm. The fibers from the other half of the retina migrate to the same side of the brain as the fibers from the other half of the retina. Every half of the brain receives visual signals from both eyes' visual fields as a result of this junction.
Hence , the correct answer is hypothalamus and epithalamus .
The given highlighted structure is attached here -
Goldfish, tuna, trout, bass are all
Bony,jawless, or cartilaginous?
Answer:
Bony
Hope this helps!
Answer:
bony
Explanation:
i`ve come across this question before, i`m pretty sure this is right
In Humans, freckles are dominant to not having freckles.
A woman with freckles marries a man who does not have freckles,the woman’s father did not have freckles.What is the probability of having a child with freckles?
A: 0%
B: 25%
C:50%
D:100%
If two heterozygous tall pea plants are crossed, what percentage of the offspring will likely be tall?
Answer:
hope it helps
Explanation:
As shown in the figure a cross between two heterozygous tall plants results in 25% h.0.m.0.z.y.gous tall, 50% heterozygous tall and 25% dwarf plants.
Which section of ocean floor is near the coastlines of all continents?
• neritic zone
O open ocean
shallow ocean
O intertidal zone
Answer:
Your answer would be:
C.) Shallow ocean
The shallow part of the ocean floor begins at the shoreline and gently slopes underwater to an average depth of about 430 feet. It is covered with thick layers of sediment.
Explanation:
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Which method of species change takes the least amount of time?
1.natural selection
2.genetic engineering
3.selective breeding
Answer:
2.
Explanation:
Genetic Engineering takes the least amount of time
Mark Branlyest if this helped!
If no new rock is deposited in this area, what will likely happen to the top layer of rock over time?
(A) It will increase in height due to Erosion.
(B) It will increase in height due to compaction and cementation.
(C) It will decrease in height due to weathering and Erosion.
(D) It will decrease in height due to cementation and deposition.
Answer:
The answer is (C) :P 211111111
Discuss the similarities and differences in chemiosmosis between oxidative phosphorylation in mitochondria and photophosphorylation in
chloroplasts.
Answer:
please give me brainlist and follow
Explanation:
Describe the similarities in chemiosmosis between oxidative phosphorylation in mitochondria and photophosphorylation in chloroplasts. Both ways create a proton gradient across a membrane. ... OXIDATIVE- The electrons come from organic molecules. Mitochondria transfer chemical energy from food molecules to ATP.
a. What is the diploid number of the species shown in Figure 1?
b. What is the haploid number of the species?
Answer:
I hope this helps you
Explanation:
1)This number is abbreviated as 2n where n stands for the number of chromosomes. For humans, the diploid chromosome number equation is 2n = 46 because humans have two sets of 23 chromosomes (22 sets of two autosomal or non-sex chromosomes and one set of two sex chromosomes).
2)Under normal conditions, the haploid number is exactly half the total number of chromosomes present in the organism's somatic cells. For diploid organisms, the monoploid number and haploid number are equal; in humans, both are equal to 23.
The diploid number is 2n no. of chromosomes and thus it is diploid instead of haploid.
This variety is abbreviated as 2n wherein n stands for the variety of chromosomes. For people, the diploid chromosome variety equation is 2n = 46 due to the fact that people have units of 23 chromosomes (22 units of autosomal or non-intercourse chromosomes and one set of chromosomes).Under everyday conditions, the haploid variety is precisely 1/2 of the entire variety of chromosomes gift withinside the organism's somatic cells. For diploid organisms, the monoploid variety and haploid variety are identical; in people, each is identical to 23.What are chromosomes?Chromosomes are thread-like systems placed in the nucleus of animal and plant cells. Each chromosome is made from protein and a single molecule of deoxyribonucleic acid (DNA).
Thus it is clear that the diploid and haploid number of the species depends on the number of chromosomes.
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3. Which field of biochemistry focuses on understanding how organisms use different chemicals for energy and remove waste products? O A. Immunology O B. Enzymology O C. Metabology W O D. Genetics
Metabology focuses on organisms use different chemicals for energy and remove waste products.
It is the Study of metabolic processes in the organism.What is metabolism?Metabolism is the process by which body converts what eat and drink into energy. During this complex process, calories in food and beverages are combined with oxygen to release the energy body needs to function.It does the conversion of the energy in food to energy available to run cellular processes.It does the conversion of food to building blocks for proteins, lipids, nucleic acids, and some carbohydrates.To know more about metabolism here
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ANSWER ASAP WILL GIVE BRAINEST TO CORRECT ANSWER
What are the two types of quantities scientists consider when examining something?
Observational and hypothetical
Modernism and postmodernism
Scientific and philosophic
Scalar and vector
Answer:
answering for leia48 he/she said its "scalar and vector" in which it is correct
Explanation:
go to him/her page and give him/her a thank you and brainliest
Caenorhabditis elegans is a species of soil-dwelling nematode (roundworm) that feeds on soil bacteria, including Bacillus thuringiensis. B. thuringiensis is a virulent bacterial pathogen that produces BT toxin, a protein that can kill different invertebrate species, including C. elegans. In a laboratory experiment, C. elegans and B. thuringiensis were cultured individually (control) or together (experimental) for 150 days. Under optimal conditions, the generation time of C. elegans is approximately 3.5 days and the generation time of B. thuringiensis is approximately 25 minutes. At the end of the experiment, the change in virulence of B. thuringiensis and the change in resistance of C. elegans to BT toxin were determined. The researchers found that after 150 days, the magnitude of the change in both B. thuringiensis virulence and C. elegans resistance was less when they were cultured individually (control) than when they were cultured together (experimental). Provide ONE reason for the difference in results between the two treatments.
Answer:
i).number of generations that is possible in individual cultures of C. elegans is 42 .
ii)number of generations that is possible in individual cultures of B elegans IS 8640.
b). When the Caenorhabditis elegans and bacillus thuringiensis have controlled growth their are no immune response to each other hence they are not adapted to each other for separate growth.
c)The relative change in B. thuringiensis virulence was greater than the relative change in C. elegans resistance because B thuringiensis had more number of generation event 8640 after 150 days while C elegans had less number of reproductive event 42.
Step-by-step explanation
explanation.
a) i).number of generation for C elegans will be given by;
growing period divided by generation time.
we have ;
generation time is 3.5 day
growing period is 150 day.
then number of generation of c will be;
150/3.5=42 generation
ii).number of generation for B thuringiensis is given by;
but we have;
generation time is 25 minutes
growing period is 150 days.
then substituting in the formulae we have ,
150 x24 x60/25=8640 generation.
we have used the relation ;
1 hour =60 minutes and 1 day = 24 hours
b).When the Caenorhabditis elegans and bacillus thuringiensis have controlled growth their are no immune response to each other hence they are not adapted to each other for separate growth. when grown together they provide the host pathogen relationship protecting the growth for each organism. B thuringiensis secrets toxin to infect the host hence having much change while C elegans are protected from this chemical since the change is high.
c).The relative change in B. thuringiensis virulence was greater than the relative change in C. elegans resistance because B thuringiensis had more number of generation event 8640 after 150 days while C elegans had less number of reproductive event 42.
B. thuringiensis have smaller genome size hence have more change .This change is caused when trying to infect C elegans hence causing a more diverse change in B thuringiensis.
C elegans genome are relatively high since they have less number of reproductive event hence being protected because they produce the immune response by growing together to show maximum changes when separately grown.
PLS HELP The diagram below shows the relationship between respiration and photosynthesis.
How is combustion similar to cellular respiration?
Answer/Explanation:
In Cellular respiration, organisms use oxygen to break down down to food molecules in order to produce energy that is needed for body function.
Combustion, which is also known as burning, also involves the use of oxygen in the break down of chemical bonds to produce energy.
Both processes give off carbon dioxide in the process along with the energy they release.
Therefore, both processes seem very much alike.
#11 TRUE or FALSE???
People are likely to remember only information consistent with their schema.
Answer:
True
Explanation:
Recognition requires one to memorize information for a second time. Anterograde amnesia is the memory loss of events that occurred after the onset of amnesia.
How many federal agencies are responsible for managing land resources in the United States
2
4
6
10
Answer:
The answer is 4
Explanation:
Right on EDGE 2021!
For the statement "How many federal agencies are responsible for managing land resources in the United States" it is four, This is further explained below, Option 4 is correct.
To find the number of Federal agencies we need to know more about Federal agencies.
What are Federal agencies?Federal agencies are simply defined as a one-of-a-kind government body created to address specific issues, such as a nation's security.
In conclusion, The four agencies are
The Department of Agriculture's Forest Service the Department of the Interior's Bureau of Land Management (BLM) Fish and Wildlife Service (FWS) National Park Service (NPS)Read more about Nations
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Scientists classify organisms in a branch of science called taxonomy. Which scientific tool listed below would aid scientists in determining how closely related two organisms are so that the scientists could classify them?
A. a meter stick to measure the sizes of the organisms
B. an x-ray to examine the skeletal structure of the organisms
C. a triple-beam balance to calculate the relative masses of the organisms
D. an analog GPS tracker to investigate the habitats and ecosystems of the organisms?
Answer:
b
Explanation: if they could see an x-ray of the bone structure they could understand further how they are related
All of the world's plants, animals, and microorganisms are included in taxonomy, which is the science of naming, describing, and classifying species.
What is Taxonomy?Taxonomists identify, describe, and classify species, particularly those that are novel to science, using morphological, behavioral, genetic, and biochemical observations.
Taxonomy recognizes and catalogs the elements of biological diversity, offering the fundamental information necessary for the management and application of the Convention on Biological Diversity.
Taxonomists have identified roughly 1.78 million species of animals, plants, and microorganisms throughout the past 250 years of study, but the true number of species is unknown and likely between 5 and 30 million.
Therefore, All of the world's plants, animals, and microorganisms are included in taxonomy, which is the science of naming, describing, and classifying species.
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A lever with a mechanical advantage greater than 1 is used to ____.
a.
change direction
c.
increase force
b.
increase distance
d.
decrease force
Please select the best answer from the choices provided
A
B
C
D
Parts of a Flower
Will mark Brainliest
Answer:
this is your answer mark me brainlist
Compared to water, what is the oxygen content of air and density of air?
Answer:
Air dissolved in water contains approximately 35.6% oxygen compared to 21% in air
Helppp me A,B,C,D I need help choose one for me
Answer:
A. Neither the subjects nor the researchers can bias the results.
Explanation:
As described, a double- blind study is one in which the researcher and his study does not know the person receiving the actual treatment.
Researchers can be bias in their studies as they seek to establish and fine tune results in the way the best favors them. A double-blind study helps to bridge this gap to prevent bias that might be introduced into an experimental set up or while interpreting results.
Answer:
A. The researchers might not bother providing the placebo
Explanation:
Which of the following is the correct classification for Dionaea muscipula?
A. Plantae, because it is primarily autotrophic.
B. Fungi, because it has multiple food sources.
C. Archaea, because one of its characteristics is "unusual."
D. Protista, because it uses tiny hairs as a trapping device.
Answer:
D
Explanation:
Protista,because it uses tiny hairs as a trapping device.
Which of the following represents the smallest level of organization in the body?
A cardiac muscle tissue
B the heart
C the muscle cell
D the circulatory system
An established ecosystem may remain stable over hundreds of years
because *
A. species interdependence is absent
B. there is a lack of variety in the species
C. no competition exists between the species
D. there are natural checks on species
The correct option is "C" which is no competition exists between the species.
Since an ecosystem is formed when the living factors in an area interact with each other and with other non-living factors that surround them.
How is an ecosystem established?An ecosystem is formed when the living factors in an area interact with each other and with other non-living factors that surround them.
An ecosystem can be as small as a drop of water and large as an ocean.
Thus, the option "C" which is no competition exists between the species is correct.
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