In the food chain below, which is the producer? flower - mouse - snake- hawk

QUESTION POSTED AT 14/01/2020 - 03:05 PM

Answered by admin AT 14/01/2020 - 03:05 PM

The question is asking us the following: "In the food chain below, which is the producer? And the food chain is: flower - mouse - snake- hawk", The producer is the organism that can produce energy from the source, typically from the sunlight, without eating parts of other animals. Producers are plants - and almost all plants are produces (some are also consumers). so the answer is "flower'
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Which of the following monomers vary based on the structure of their side chains?. . Fatty acids. . Monosaccharides. . Nucleotides. . Amino acids. . What type of molecule is represented by the model below?. . -A molecule made up of four carbon rings with other atoms bonded to those rings-. . A.Fat. . B.Carbohydrate. . C.Steroid. . . D.Protein

1. Which of the following monomers varies based on the structure of their side chains, the correct answer is Amino acids.


2. What type of molecule which is represented by the model below? The correct answer is Steroid.

Amino acids are termed as organic compounds which contain amine. The key elements of amino acids are Hydrogen, Nitrogen, Oxygen, and Carbon. Amino acids from the second largest component which is found in human muscles and other tissues. Amino acids function as a transport of neurotransmitter and in biosynthesis.

Steroids are referred to as organic compounds which have four rings which are managed in a specific molecular configuration. Steroids functions as 1.components of cell membranes which alters membrane fluidity.
2. Signaling molecule.
They are found in fungi, animals, and plants. They are composed of 17 carbon atoms.

ANSWERED AT 21/01/2020 - 10:16 AM


QUESTION POSTED AT 21/01/2020 - 10:16 AM

The maltose molecule can be broken down into two individual glucose molecules with the help of an enzyme produced within a cell. Which of the following changes is most likely to slow down this reaction?. . A. Adding more maltose molecules. . B.Increasing the volume of the cell. . C.Adding more of the enzyme. . D. Increasing the pH within the cell.

D. Increasing the pH within the cell.

Maltose is also known as malt sugar and commonly found in germinating grains. Thus, maltase is enzyme that split the disaccharides maltose into two glucose molecules and can be found within the small intestine of vertebrates which includes human and animals. However, increase in pH of the cell will generally result in incomplete loss of enzyme activities thereby slowing down the enzyme reactions.

ANSWERED AT 21/01/2020 - 10:15 AM


QUESTION POSTED AT 21/01/2020 - 10:15 AM

A population of snakes that eat small rodents enters a new habitat. In the new habitat, there are many species of rodents, and their populations are high because there are few natural predators. What will most likely be the effect on the genetic variation of the snake population? Genetic variation will increase because of a selective pressure. Genetic variation will increase because of a new habitat and food source. Genetic variation will decrease because of a selective pressure. Genetic variation will decrease because of a new habitat and food source.

Answer:

Option B, Genetic variation will increase because of a new habitat and food source.

Explanation:

There are three positive scenarios about the new environment in which the snakes have entered -  

a) There are different varieties of rodent

b) The population of rodent is high due to less number of predators.  

c) Low population of predators other than the snakes (Limited competition)

Hence, snakes will have ample supply of food in the new sphere as there is very low competition among the predators (due to low population of other predators) and also there are varieties of rodent. Due to ample supply of food and limited competition with other predators , snake population will increase and thus the genetic variation will also increase due to increased rate of breeding.

Thus, option B is correct.

ANSWERED AT 21/01/2020 - 09:50 AM


QUESTION POSTED AT 21/01/2020 - 09:50 AM

How does genetic engineering affect a cell's characteristics? A. Allows scientists to induce cells to divide rapidly. B. Allows nature to produce favorable traits slowly and precisely. C. Allows nature to produce favorable traits quickly and precisely. D. Allows scientists to induce a cell to make needed chemicals.

Your answer is B. Allows nature to produce favorable traits slowly and precisely

Because it helps scientists get rid of unnecessary traits that an organism may have.

ANSWERED AT 21/01/2020 - 09:40 AM


QUESTION POSTED AT 21/01/2020 - 09:40 AM

Where are seeds produced in a plant

The seed is formed in the ovary, where the eggs/ovules form. Pollen/sperm travels down a narrow tube to the ovary, where the egg and sperm unite to form a seed. So a seed is formed in the plant ovary.

ANSWERED AT 21/01/2020 - 09:34 AM


QUESTION POSTED AT 21/01/2020 - 09:34 AM

Which type of bacteria can be found in pairs chains squares of four cubes of eight or grape like clusters

staphylococcus i know cocc means round/ berrylike and a staph infection is caused by a bacteria  and i think staphylococcus can be found in chains

ANSWERED AT 21/01/2020 - 09:19 AM


QUESTION POSTED AT 21/01/2020 - 09:19 AM

Growing up, darwin saw that farm animals with preferred traits were chosen for breeding. Those chosen animals usally produced offspring with the preferred traits. this best illustrates the process of?

Answer:

Artificial Selection

Explanation:

Artificial selection is the intentional reproduction of individuals in a population that have desirable traits. In organisms that reproduce sexually, two adults that possess a desired trait — such as two parent plants that are tall — are bred together.

ANSWERED AT 21/01/2020 - 09:16 AM


QUESTION POSTED AT 21/01/2020 - 09:16 AM

When a volcano erupts, it results in dangerous lava and mud flows, and the ash it produces can travel hundreds of miles. Which of the following best describes an initial consequence of this catastrophic event? Less diversity of plants Prolonged drought Increase in invasive species Plant populations increase

The only one that best describes an initial cosequence of this catastrophic event is the first option Less diversity of plants. But few species can grow in lava. Though cold lava is hard to being fertilized for plants as it's difficult to grow roots into tough layer of the lava.

ANSWERED AT 21/01/2020 - 07:52 AM


QUESTION POSTED AT 21/01/2020 - 07:52 AM

Where in the cell was the ATP produced? in mitochondria in chloroplasts in cytoplasm in water

Answer: in mitochondria and also cytoplasm and chloroplasts

Explanation:

It occurs in mitochondria in all eukaryote cell types to provided ATP need. The ATP production in chloroplast is only for its own reactions so cell do not benefit that. In prokaryotes, the ATP can be provided in the cytoplasm.

ANSWERED AT 21/01/2020 - 07:33 AM


QUESTION POSTED AT 21/01/2020 - 07:33 AM

If we wanted to avoid using a non–renewable resource, because we do not want to harm the environment, we could burn _____ to produce electricity. biomass coal natural gas petroleum

Biomass

Coal, natural gas, and petroleum are all non-renewable resources.  Biomass is  considered a renewable resource because it depends on agricultural waste and other things like wood, instead of coal, petroleum, etc.  Biomass is considered to be a fossil fuel replacement, with the consequences of releasing carbon dioxide when burned.

ANSWERED AT 21/01/2020 - 07:24 AM


QUESTION POSTED AT 21/01/2020 - 07:24 AM

The tundra ecosystem of Alaska is known as a “cold desert.” It receives very little precipitation, about four inches annually. However, it is rich in wetlands due to permafrost, which traps moisture close to the surface. The temperatures vary widely, also producing persistent winds. Although treeless, the Arctic tundra is an abundant ecosystem. Many organisms find their niche here including many migratory bird species and mammals such as caribou, foxes, bears, and small rodents. Which element of the tundra ecosystem is biotic? A.wind B.dead bird C.carbon dioxide D.temperature

The correct answer is option B. dead bird

In an ecosystem two types of components exist which are known known as biotic and abiotic.

A biotic component is the one which has life or had life at some point of time. A dead bird is therefore considered as biotic component because even though at present it doesn't have life yet earlier it had life. Abiotic components are those components which neither have life at present nor they had in past. Wind, carbon dioxide and temperature are therefore considered as abiotic components of tundra ecosystem.

ANSWERED AT 21/01/2020 - 07:21 AM


QUESTION POSTED AT 21/01/2020 - 07:21 AM

Select all that apply. Q.our chemoreceptors are mostly for tasting while other animals use them for finding food finding mates smelling sensing danger

Answer:

The correct options are finding food, finding mates and sensing danger.

Explanation:

Chemoreceptors are receptors that sense or detects different chemical stimuli in the atmosphere and take that information to the brain and spinal cord.

In humans, chemoreceptors are mostly for testing and other higher animals. In most animals, chemoreceptors are used in finding foods, finding mates and sensing danger.

Pheromones are a type of chemoreceptors for finding food and mates.

Thus, the correct options are finding food, finding mates and sensing danger.

ANSWERED AT 21/01/2020 - 07:20 AM


QUESTION POSTED AT 21/01/2020 - 07:20 AM

A farmer chooses the largest grains from a crop of wheat to plant for the next growing season.what would you predict for his wheat crop? A.the wheat will be more likely to be taller and leafier. B.the grains will be genetically engineered to produce more wheat. C.the crop will be more likely to die from a fire. D.the new crop will be more likely to have grains as large or larger

The grains he chooses are large ones so they have a greater chance of producing corn with large grains. Species pass on their genes to their offspring.

Answer: D. The new crop will be more likely to have grains as large or larger.

ANSWERED AT 21/01/2020 - 07:13 AM


QUESTION POSTED AT 21/01/2020 - 07:13 AM

How does the large intestine help the body excrete wastes? A) It reabsorbs water from filtrate. B) It forms urine. C) It removes urea from the body. D) It processes undigested food into feces

The correct answer is option D

The main function of large intestine is to process the undigested food into feces.

The food when ingested by the mouth reaches the stomach and then small intestine. The nutrients are then absorbed from the food by the small intestine.

The left over undigested food is converted into feces in the large intestine and is removed out of the body by rectum.

ANSWERED AT 21/01/2020 - 06:59 AM


QUESTION POSTED AT 21/01/2020 - 06:59 AM

What is the main difference between aerobic respiration and anaerobic respiration? A: aerobic respiration requires oxygen to proceed, but anaerobic does not. B: aerobic respiration occurs during photosynthesis, but anaerobic respiration occurs during cellular respiration C: aerobix respiration produces atp, but anaerobic respiration does not D: aerobic respiration occurs only in living organisms, but anaerobic respiration occurs in nonliving organisms

The correct answer is (a) aerobic respiration requires oxygen to proceed, but anaerobic does not

  • The aerobic respiration takes place only in the pressence of oxygen and the later is required to carry forward the reaction. This means the aerobic respiration takes place in a oxygen rich environment. The end product of aerobic respiration is carbon dioxide and water and the amount of energy released in the form of ATP( adenosine triphosphate)
  • Anaerobic respiration takes place in the oxygen deficient environment. This respiration takes place when the body has no or less oxygen supply. Example: decomposition, alcohol fermentation

ANSWERED AT 21/01/2020 - 06:56 AM


QUESTION POSTED AT 21/01/2020 - 06:56 AM

Name 2 ways that cross-fertilization of flowers might happen (besides by the wind)?

I know one of them is by pollination from bees but i have no clue what another one is

ANSWERED AT 21/01/2020 - 06:54 AM


QUESTION POSTED AT 21/01/2020 - 06:54 AM

Which colorless and odorless gas, produced by radioactive decay of Uranium-238, is considered to be a form of pollution

Radon is the answer
 b

ANSWERED AT 21/01/2020 - 06:48 AM


QUESTION POSTED AT 21/01/2020 - 06:48 AM

A species of mice can have long or short tails. if you crossed a male mouse which is heterozygous and has a long tail with a female mouse with a short tail, what would the expected phenotypic outcome be and why?

Answer: The expected phenotypes will be long tail and short tail

Explanation:  

Suppose L for the character "long tail" and l for "short tail, the genotype of the male for that character would be Ll (dominant heterozygous), and that of the female ll (homozygous recessive). When these individuals intersect, the progeny of the F1 (first generation) would be genotypically Ll or ll, therefore the expected phenotypes will be long tail and short tail. Those with long tails will be heterozygous and those with short tails will be homozygous. This is because the male has a dominant and a recessive allele giving the chance of two possible combinations of alleles, while the female being homozygous, only has one allele option to combine with any of the two from the male. When a recessive allele meets a dominant one, the dominant one is expressed in the phenotype. A recessive allele will only be expressed if it is combined with another recessive.

ANSWERED AT 21/01/2020 - 06:19 AM


QUESTION POSTED AT 21/01/2020 - 06:19 AM

You have an ecosystem with the following organisms: birds, fruit trees, tigers, and monkeys. which list would best describe the food chain?

The answer is fruit trees, birds/monkeys, tigers. Producers are the first level of the food chain. Plants are producers because they produce their own food. So, fruit trees will be at the beginning of the food chain. The next level belongs to the primary consumers. Primary consumers are animals that feed on producers. Both birds and monkeys feed on fruit trees, so they are the next in line after fruit trees. Finally, secondary consumers eat primary consumers, such as birds and monkey. Tigers are secondary consumers, and thus they are last on the food chain list.

ANSWERED AT 21/01/2020 - 06:13 AM


QUESTION POSTED AT 21/01/2020 - 06:13 AM

A purple flower with an unknown genotype is crossed with a white flower. determine the genotype of the purple flower if purple (p) is dominant and white (p) is recessive

Dominant is always capitalized and recessive is always lower case so if you have Dd then its dominant since the first letter is dominant,if its yy then its recessive.you can also look at the punnet squares.

ANSWERED AT 21/01/2020 - 06:07 AM


QUESTION POSTED AT 21/01/2020 - 06:07 AM

Yellowfin tuna, or Thunnus albacores, are large sport fish that are found in tropical and subtropical waters around the world. They typically school under objects such as boats or patches of driftwood for protection from predators. Schooling under these structures also provides yellowfin tuna with easy access to a food source such as smaller herbivorous fish that may be foraging for food around the structures. Which trophic level does yellowfin tuna fill in a food chain?we

The answer is secondary consumer.

A trophic level of an organism shows its position in a food chain:

1. Producers, such as plants and algae, produce their own food and thus are the base of every food chain.

2. Primary consumers eat producers. They are herbivores that eat plants.

3. Secondary consumers eat primary consumers. They eat herbivores, so they are carnivores or omnivores.. 

4. The highest level is tertiary consumers that eat secondary consumers


According to this, and knowing than yellowfin tuna eat smaller herbivorous fish, it can be concluded that it belongs to the secondary consumers.

ANSWERED AT 21/01/2020 - 05:49 AM


QUESTION POSTED AT 21/01/2020 - 05:49 AM

When might an organism rely on fermentation to produce the energy it needs?

When there is not enough oxygen for cells to use cellular respiration

ANSWERED AT 21/01/2020 - 05:37 AM


QUESTION POSTED AT 21/01/2020 - 05:37 AM

Approximately how much energy is transferred from one step in a food chain to the next? 90% 1% .1% 10%

Answer:

10%

Explanation:

ANSWERED AT 21/01/2020 - 05:33 AM


QUESTION POSTED AT 21/01/2020 - 05:33 AM

Legumes, a type of plant, require Rhizobia, a type of soil bacteria, to survive since these organisms fix nitrogen during photosynthesis. Rhizobia use the legumes for food. What would most likely happen to the legume population if Rhizobia suddenly became extinct?

Answer: The legume population will decrease.

Explanation: Legumes are the plants that use Rhizobia, a bacteria that is used  for nitrogen fixation.

The legumes will not survive and slowly its population will decrease. This is because there will be no nitrogen fixation in the legumes without rhizobia.

Nitrogen synthesis is important for the various metabolic activities inside the plant. So, many processes of the plant will be disturbed and ultimately the plant will die.

ANSWERED AT 21/01/2020 - 05:17 AM


QUESTION POSTED AT 21/01/2020 - 05:17 AM