1. A square mile of tropical rainforest contains 36 mammal species. A square mile of tundra contains 4 mammal species.
What characteristic of ecosystems is being described above?
producers
abiotic factors
succession
biodiversity
2. Which of the following is most likely to decrease biodiversity?
Protecting more land from future housing developments
Reintroducing natural predators to an area
Clearing a forest to raise livestock for a nearby town
Adding native plants to a suburban garden
3. In the Kelp forest ecosystem, sea urchins eat kelp, and sea otters eat sea urchins.
What is the role of sea urchins in this ecosystem?
primary consumers
secondary consumers
primary producers
producers
4. What is the correct order of energy flow in an ecosystem?
sun → grass → rabbit
sun → rabbit → grass
fox → rabbit → grass
sun → fox → rabbit
Answer:
Explanation:
A square mile of tropical rainforest contains 36 mammal species. A square mile of tundra contains 4 mammal species.
What characteristic of ecosystems is being described above?
producers
abiotic factors
succession
biodiversity
2. Which of the following is most likely to decrease biodiversity?
Protecting more land from future housing developments
Reintroducing natural predators to an area
Clearing a forest to raise livestock for a nearby town
Adding native plants to a suburban garden
3. In the Kelp forest ecosystem, sea urchins eat kelp, and sea otters eat sea urchins.
What is the role of sea urchins in this ecosystem?
primary consumers
secondary consumers
primary producers
producers
4. What is the correct order of energy flow in an ecosystem?
sun → grass → rabbit
sun → rabbit → grass
fox → rabbit → grass
sun → fox → rabbit
Under which of the following conditions will the lac operon be expressed at the highest level? a. Glucose and lactose present b. Glucose present, lactose absent c. Glucose absent, lactose present d. Glucose and lactose absent
Two requirements must be satisfied for the lac operon to express at high levels: There must be no glucose.
What does a high glucose level mean?Because the body doesn't produce enough insulin, hypoglycemia (high blood glucose) occurs because there is too much sugar inside the blood. Vomiting, increased appetite and thirst, a rapid heartbeat, problems with vision, and other symptoms are signs of hyperglycemia, a diabetic symptom. Serious health issues might result from untreated hyperglycemia.
What is a healthy blood sugar level?Sugar levels around 140 ppm (7.8 mold/L) are considered normal. After two hours, a result of greater above 200 mg/dL (11.1 meq) indicates diabetes. You have prediabetes if your blood sugar level is between 140 or 199 mg/dL (7.8 molar ratio and 11.0 mmol/L).
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Which of the following is the correct order of the structures through which light passes after entering the eye?
A)
lens, pupil, cornea, retina
B)
pupil, cornea, lens, retina
C)
pupil, lens, cornea, retina
D)
cornea, pupil, lens, retina
The following is the correct order of the structures through which light passes after entering the eye : Cornea, pupil, lens, vitreous humour retina
Light travels like this:
1) Enters the cornea, which bends light. 2) Light passes freely through the pupil of the iris. 3) Light passes through the vitreous. 4) The retina captures light rays and processes them into impulses.
Some of this light enters the eye through an opening called the pupil. The iris (the colored part of the eye) controls the amount of light accepted by the pupil. The light then passes through the lens (the transparent part of the eye). The lens works with the cornea to correctly focus light onto the retina.
The eight structures in the eye that light passes through before hitting the photoreceptors are the cornea, aqueous humor, lens, vitreous humor, ganglion cell layer, inner reticular layer, inner nuclear layer, and outer reticular layer. .
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Which of the following describes a parasite? (I know it’s between B or D but I’m not sure which one, also, please don’t put links!!)
A) A fish that is killed and eaten.
B) A worm that lives inside a bear.
C) A bear that kills and eats fish.
D) A bear that has worms in its gut.
Answer:
B) A worm that lives inside a bear.
Explanation:
A parasite is a living organism that lives inside or outside of another organism called a HOST in order to obtain nourishment from such organism. A parasite that lives inside its host is called ENDOPARASITE while a parasite that lives outside its host is called ECTOPARASITE.
In this question, a worm that lives inside a bear is a PARASITE because it is living inside the bear, which is the host in order to obtain nourishments. Note that, the answer is not option D because the bear is a HOST not a parasite.
Changing the temperature or pH can change an enzyme's shape. Explain how changing the temperature or pH might affect the function of an enzyme.
Answer:
Temperature: Raising temperature generally speeds up a reaction, and lowering temperature slows down a reaction. However, extreme high temperatures can cause an enzyme to lose its shape (denature) and stop working. pH: Each enzyme has an optimum pH range. Changing the pH outside of this range will slow enzyme activity.
The Law of Conservation of Energy states that energy is never created or destroyed but only changed from one form to another. Based on the equation of photosynthesis, where do you hypothesize the energy from the Sun is now stored?
Because sunlight energy is required for the conversion of carbon dioxide and water into glucose and oxygen during photosynthesis, the rule of conservation of energy is related to this process.
What is the Law of Conservation of Energy?The term "conservation" refers to a physical quantity or parameter's entire value (such as energy, mass, linear or angular momentum).
Therefore, every new glucose molecule contains a small amount of the energy the sun provides. In the presence of sunshine, a series of chemical reactions called photosynthesis transforms carbon dioxide and water into glucose and oxygen.
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The efficiency of glycolysis is approximately
A) 0.2%
B) 2%
C) 20%
D)200%
Answer:
The correct answer is B.
Explanation:
What is the chance in percentage (%) that the child being homozygous for the trait?
A homozygous recessive (AA) kid has a 25% chance of being unaffected, a heterozygous (Aa) carrier child has a 50% probability, and a homozygous homozygous (AA) child has a 25% chance.
A genetic disorder or characteristic can be transferred from parent to kid via autosomal dominant inheritance. The genetic disease can be brought on by one copy of a mutant (changed) gene from one parent. A mutant gene-carrying parent has a 50% chance of passing it on to their kids.
Four of the 16 potential gamete pairings from a SsYy x SsYy cross are viable. When the genes (also known as alleles) that regulate how a feature develops are paired in exactly the same ways, the trait is said to be homozygous. Being heterozygous for a trait means having several alleles for that trait. A homozygous characteristic will always show itself in the same way.
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Which of the following statements correctly describes a portion of the pine life cycle? a. Apollen tube slowly digests its way through the triploid endosperm. b. Seeds are produced in pollen-producing cones.
c. Pollen grains contain female gametophytes. d. Female gametophytes produce eggs.
pollen grains accurately summarizes a stage of the pine life cycle in which the apollen tube slowly helps in digestion its way through into the triploid endosperm.
Are male gametes present in pollen grains?Pollen grains are created by an anther and contain male gametes. In a procedure termed as fertilization, the male gamete and female gamete combine to create a zygote, which eventually develops into a new seed.
Are male gametes and pollen grains similar?So the pollen is a male gametophyte that is either immature or partially formed. Similar to this, a unicellular microspore generates male gametes and undergoes mitotic cell division to become a mature microgametophyte. As a result, the pollen grains contain immature and made significant contributions male gametophytes.
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On what date is the North Pole getting 24 hours of daylight?
Answer:
December 21st
Explanation:
Midsummers' Day :)
Answer:
The 21st of December
Explanation:
I know this cause we learned about it in class
Which phrase describes estuaries?
are made of fresh water only
are areas where rivers flow into lakes
are homes to unique plants and animals
are places where all of Virginia's water drains
O
are areas where rivers flow into lakes. A coastal body of brackish water that is partially contained, has one or more rivers or streams flowing into it, and has a free connection to the open sea is called an estuary.
Estuaries are areas of water where rivers and the ocean converge. They serve as habitat for a variety of fauna, including well-known fish species. They also help employment, tourism, shipping, and other things. Due to the fact that estuaries often have brackish waters, which are a mixture of fresh water that drains from the land and salty ocean, many different kinds of plant and animal species call them home. Numerous habitats are produced by this unusual admixture of fresh and salt water.
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Plantlike photosynthesis that releases oxygen (O2) occurs in _____. Cyanobacteria actinomycetes chemoautotrophic bacteria chlamydias archaea
Plantlike photosynthesis that releases oxygen (O2) occurs in Cyanobacteria.
Cyanobacteria is a type of a gram-negative bacteria that lives in any body of water which also synthesize its energy by the means of photosynthesis; using the power of sunlight to synthesize its food from carbon dioxide and water, and converting the light energy into a chemical energy with a byproduct of oxygen. The large existence of cyanobacteria may contaminate the water, polluting the water with the toxins it produces called cyanotoxins, and are harmful to people and animals.
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electron microscope magnify up to __________
Answer:
between 1 and 50 million times
Explanation:
A light microscope can magnify things up to 2000x, but an electron microscope can magnify between 1 and 50 million times depending on which type you use! To see the results, look at the image below.
During one night in 1995, a 1600-foot section of Sleeping Dunes National Lakeshore beach collapsed and landed in Lake Michigan. The missing sand created a steep 100-foot drop straight into Lake Michigan.
What caused the disappearance of the beach and the creation of the 100-ft drop into Lake Michigan?
A.
a landslide
B.
glacier movement
C.
deposition
D.
weathering
Landslides are the displacement of material from higher to lower regions due to the action of different factors. A) a landslide caused the disappearance of the beach and the creation of the 100-ft drop into Lake Michigan.
What is a landslide?A landslide can be defined as a massive movement of materials that include rocks, soil, plants, debris, and other elements composing the ground.
Mass of material moves from high altitude to low altitude due to the action of gravity and the influence of other factors as humidity excess.
These movements occur because the material is exposed to external forces (gravity) that supersede the strength of these materials producing slope breaks.
Other factors such as rains, increase in water level, snowmelt, erosion, earthquakes, human activities, and others influence the landslide occurrence.
The correct option is A) a landslide caused the disappearance of the beach and the creation of the 100-ft drop into Lake Michigan.
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Is a snail considered an animal or an insect?
Snail is considered as an animal as insects strictly belong to the pylum Arthropoda.
Snails are the animals of the phylum Mollusca. They belong to the class Gastropoda and are recognized by the presence of the spiral shaped shell on the upper side of the body. Snails can be present on land or even in water. It moves y the help of a single muscle like foot.
Arthropoda is the largest phylum of the Animal kingdom that possesses the invertebrate organisms. The characteristic features of the organisms of this phylum is presence of exoskeleton, segments in the body and paired appendages. The organisms of Arthropoda are referred to as insects.
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How are proteases activated in the stomach and small intestine?
The proteases are activated by the pH that changes in the stomach and small intestine.
Proteases are the proteins that have the ability to cleave the peptide bonds present in the proteins. The proteases are very important part of the digestive system as they are major forces that make protein digestible and amenable to assimilation. The protease are secreted with the digestive enzymes the are produced in the stomach and small intestine predominantly. The proteases are produced in the inactive form so that they cannot digest the cell that are producing them. In order to become active they need special condition such as pH for their activation.
So, pH is the major activating condition for the proteases, in addition to it there are special protein that act on inactivated protease to make them active.
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I need help with this science question. Thank you!
Answer:
a. 25 N ---> Direction: Right
b. 40 N ---> Direction: Right
c. 10 N ---> Direction: Right
d. 90 N <--- Direction: Left
e. 40 N down Direction: Down
Hope this helps!
Rex rabbits have short fur and Angora rabbits have long fur. When mated together these rabbits produce offspring with medium length fur.
On a sheet of paper, make a Punnett square showing a cross that could result in the birth of short fur, long fur and medium fur babies.
What would be the parent genotypes that could result in short fur, long fur, and medium fur babies?
The offspring of an Angora and Rex rabbit hybrid have fur that is significantly longer than that of a Rex rabbit. There is a 0.25 percent probability that the child will have long fur based on the genotype of the parents.
The length of the offspring's' fur indicates an imperfect dominant inheritance pattern. Incomplete dominance is an inheritance pattern in which the phenotype of the offspring closely matches that of one parent more than the other, but is intermediate between the phenotypes of the parents.
In this instance, the progeny have fur length that is roughly equivalent to that of an Angora rabbit but slightly longer than that of a Rex rabbit. This is an illustration of partial dominance.
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A local town has a problem with too many mice running around. In response to this they start a war on the mice, and get neighboring communities to join them. As a result, all of the mice for 40 square miles are wiped out. The town's people are very happy, hypothesize what kind of impact you think this may have on the ecosystem in this area.
Answer:
See the answer below
Explanation:
The impacts of wiping out the mice can be classified into two - positive or negative.
The positive impact resulting from wiping out the mice would be felt in terms of reduced destruction to properties, transmission of pathogens, and constituting a nuisance to the environment.
The negative impact, however, will largely be felt on the existing food chains in the community. Organisms that serve as food for the mice will experience a boost in their population as a result of reduced predation while organisms whose source of food depends on the mice will see a decline in their own population as a result of inadequate food. This might create a chain reaction that may lead to a major disruption to the food chains and the overall functioning of the ecosystem.
Which of the following is an example of chemical reaction
Answer:
A chemical reaction happens when one or more chemicals are changed into one or more other chemicals. Examples: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.
Explanation:
Hope this helps
What are the 5 chromosome mutations?
The 5 chromosome mutations are given as , duplication, deletions, insertions , inversions, translocation.
1. Duplication: The multiple copies of a chromosome that occur during the duplication process.
2. Deletions - When a nucleotide is removed, the mRNA codons change (the nitrogen bases of a DNA). This will change the makeup of amino acids.
3. Insertions – An insertion is the addition of a new nucleotide.
4. Chromosomal inversions happen when a chromosome fragment breaks off and reattaches in the opposite direction to the same spot.
5. Translocation: This is the splitting in half and moving of two chromosomes.
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When fungal buds remain attached in a row following cell division, the resulting chains of yeast cells are called ______
When fungal buds remain attached in a row following cell division, the resulting chains of yeast cells are called Pseudohyphae.
Yeast cells form chains called Pseudohyphae when fungal buds remain attached in a row after cell division. This type of chain formation allows for the growth and expansion of fungi in an environment, helping them to survive and thrive.
Pseudohyphae can be found in a variety of different fungi, including Candida albicans and Cryptococcus neoformans.
Understanding the formation of Pseudohyphae is important in order to monitor and control the growth and spread of fungi.
Pseudohyphae can be an indication of a fungal infection, and are typically associated with Candida yeast species. The formation of Pseudohyphae can be used to help diagnose a fungal infection and provide further information about the type of fungus involved.
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Which is true about fossils and rocks found in the same layer(strata)?
A.) They are made of the same minerals.
B.) They have the same color and texture.
C.) They are relatively the same age.
D.) None of the above.
Answer:
B.) They have the same color and texture.
The picture below shows four locations on the map of Australia.
Which of these locations is most likely to experience moderate climate throughout the year? FLVS
Location A
Location B
Location C
Location D
I choose answer b on this map
You’ve learned about the laws of thermodynamics. using examples, explain why the first and second laws are significant for living organisms.
The first law of thermodynamics in living things. The sun provides the energy for photosynthesis. Plant leaves have cells that take in light energy and transform it into chemical energy.
The second law states that when everything goes from order to disorder, entropy increases. Living organisms die when there is a systemic imbalance.
Glucose, which is needed to create the complex carbohydrates required to increase plant bulk, serves as a reservoir for the chemical energy.
The second law of thermodynamics has two statements: Clausius's claim A system that operates in a cycle and transfers heat from a low-temperature reservoir (or object) to a high-temperature reservoir (or object) without causing any outside influences or interacting with the environment is not conceivable to build.
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What enzyme makes mRNA?
Answer:
RNA polymerase II
Explanation:
where in the cell, are the ribosomes?
Answer:
Explanation:
Ribosomes are found 'free' in the cell cytoplasm and also attached to rough endoplasmic reticulum. Ribosomes receive information from the cell nucleus and construction materials from the cytoplasm.
Answer:
the part that I circled in blue is where ribosomes are in a cell
In the space provided below (1) illustrate, (2) label, and (3) describe
each of the stages of the water cycle (listed above). Use arrows to indicate the
direction of water movement. Page 13 of your Earth Science text book details
the events of the water cycle. You may choose to select and use an image of the
water cycle that you copy from an online resource, however, to receive full credit
you must label and define each process and add directional arrows if they are not
provided
Answer:
Explanation:
TRY TO USE THIS
Indicate whether the glven act would create water retention or water loss In the body.
Dry mouth ~ Increased osmolarity of blood aldostorenone hyposecretion ~ Decreased renal tubular reabsorption of water Renin release ~ Hyponatremia
Increased blood pressure ~ Ingestion of water
ADH hypersecretion ~ Hyperkalemia
Increased water permeability of the DCT and collecting ducts of the kidneys ~ Hemorrhage
Exercise in a warm climate
ADH and testosterone increase the risk of heart and volume as the water is absorbed into the bloodstream into to the capillaries, bringing the blood salt concentration back to normal.
What does the renin enzyme do in response to a lower ph quilt in the kidney?An enzyme known as renin is released by kidney cells in response to low blood pressure. The kidneys reabsorb salt due to renin. Water retention is a constant side effect of sodium reabsorption. Blood pressure and volume are restored as a result.
Which hormone promotes water retention while guarding against dehydration?A deficiency of renin - angiotensin system (ADH), also known as prolactin, usually prevents hydration, or the kidneys and liver inability to react to ADH, are the two main causes of diabetes insipidus. The kidneys may hold onto the body's fluids thanks to ADH. The steroid.
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I need help with the 2nd problem, the graph in the top is the info you need to know about it.
Answer:
Cell C is the white blood cell
white blood cells need a lot of Mitochondria because since they hunt down pathogens in your bloodstream, they will need a lot of energy.
C goes into the last blank
Explanation: