how many molecules of DNA would result from one molecule after five cycles of PCR?
Why do negative essay results not always mean Michael is absent
Answer:
I think you mean molecule not Michal so the answer is: the concentration of the molecule may be too low to be detected
Explanation:
in which country green rain fell upon?
Answer:
In India ,Kolkata green rain fell.
I hope it helps
have a great day
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Answer:
The country in which green rain fell upon is
India.(kolkatta)
Is photosynthesis the ONLY driver for cycling matter and energy in ecosystems? yes or no
Do not play on my question please.
what caused the earth to separate into layers
Answer:
When the inside of the Earth was liquid, gravity caused the heavier elements nickel and iron to sink to the center. Lighter elements floated to the surface. Over time this process caused the Earth to separate into layers.
Explanation:
Radio telescopes measure the galaxy’s distribution of _____.
hydrogen from which stars are formed
X-rays given off by black holes
photons from the sun
dust ejected from asteroid impacts on other planets
Explanation:
Hydrogen from which stars are formed
The prefix "homo-" means what?
A. Same
B. Different
Answer:
A) same
Explanation:
Homo- is the same and hetero- is different .
Hope this helped :)
The graph below shows the population of mice living in a certain area over fifteen years Which numeral on the graph points to a time when the birth rate exceeded the death rate of the mice?
I
II
III
IV
Answer:
I
Explanation:
In section I, the graph has a positive slope.
Birth rate - death rate = positive, the birth rate is more than the death rate
Sections II and IV have a balanced population where the birth and death rate are the same
In section III the death rate exceeds the birth rate
The numeral I on the graph points to a time when the birth rate exceeded the death rate of the mice.
What is death rate?The mortality rate, also known as the death rate, is a measure of the number of deaths in a given population per unit of time, scaled to the population's size.
The birth rate is the number of people born in a population in a given period of time. The number of people born per year per 1000 in the population is referred to as the human birth rate.
In section I, the graph has a positive slope. Birth rate and death rate difference is positive here, it means the birth rate is more than the death rate.
Sections II and IV have a balanced population with the same birth and death rates. Section III has a higher death rate than a higher birth rate.
Thus, the answer is numeral I.
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For each phrase below, choose the most appropriate key term from the list above
a. The improper or unsafe use of a drug
b. A drug that is inhaled as vapors
c. a drug that temporarily increases energy and alertness
d. drug withdrawal occurring in newborn infants
e. laboratory made drugs that closely resemble common illegal drugs in chemical structure and effect
f. a drug that slows the body and the brain
Answer:
a. Drug abuse
b. Inhalants
c. Stimulants
d. Neonatal abstinence syndrome
e. Club designer drugs
f. Depressants
Explanation:
Drug abuse can be defined as the excessive use of drugs that can be harmful to the individual or to others, which is associated with social, behavioral, physical and job-related problems. Inhalants drugs (e.g., glue, cocaine) are volatile drugs whose inhalation may induce psychoactive and/or mind-altering effects. Stimulant drugs (e.g., cocaine, amphetamines) are drugs that excite body functions by accelerating the activity of the central nervous system (CNS), while depressant drugs (e.g., alcohol) slow down the CNS. Neonatal abstinence syndrome occurs when a neonate withdraws from certain drugs (usually opioid drugs which interact with opioid receptors) to which he/she was exposed before birth. Finally, designer drugs (e.g., ecstasy, ketamine, LSD) are drugs synthesized in illegal labs which are commonly known as “club drugs” because they are often used and sold in nightclubs.
Which of the following is not true about renewable energy sources?
They do not pollute the air.
They can help save energy costs.
They do cause an increase in greenhouse gases.
They do not use up a finite supply of a resource.
Answer:
They do cause an increase in greenhouse gases.
Explanation:
Renewable resources are the resources that are available in abundance that do not have adverse effect to the nature. These resources are available in abundance and they are not subject to extension. They are also said to be known as clean energy. renewable energy is obtained by the renewable resources. The pollution is caused minimal and the energy is saved by the use of renewable resources.
Answer:
C. they do an increase in greenhouse gases
Explanation:
7. What biological process occurs after there has been a disturbance such as a flood, or a tornado-in an established ecosystem?
Answer: Ecological disturbance, an event or force, of nonbiological or biological origin, that brings about mortality to organisms and changes in their spatial patterning in the ecosystems they inhabit. Disturbance plays a significant role in shaping the structure of individual populations and the character of whole ecosystems.
Explanation: Source where I got the answer from: https://www.britannica.com/science/ecological-disturbance
You can copy the link and paste.put it in the search and click and there you go.
hey i would really appreciate if someone helps me out
1. Why should we care that the panthera tigris is going extinct? Explain how humans might be affected by the loss of the panthera tigris.
Answer: I believe tigers, also known as "Panthera tigris" are important to humans because they balance the ecosystem. When creatures go extinct they leave behind a scar that affects the ecosystem that is around them. Since Tigers are secondary consumers they control natural prey populations. The connection to the food web is very important and essential to keep this food web stable. Once something goes extinct it will cause the food web to shift and some primary producers will go out of control.
Explanation: Not sure if this helped at all this is just what I know about the food web. Panthera Tigris are secondry consumers so they control the primary producer population. This is just basic food web and ecosystem thinking. This is how they impact humans if they go extinct.
Which of the following describes an adaptation that relates to reproduction?
A. Hawks have sharp beak to help them quickly catch their prey
B. Elks attach leaves and grasses to their antlers to help them appear larger
C. Polar bears have white fur to help them blend into their surrounding
environment
D. Whales have a thick layer of fat called blubber to help keep them warm
Answer:
B. Elks attatch leaves and grasses to their antlers to help them appear larger.
Explanation:
Reason 1: If the Elk appears larger other male Elks would be too scared to fight that Elk for a female. Reason 2: The female Elk will be more attracted to the larger male Elk even if it's largeness is fake.
Mushrooms are a type of fungus. What characteristic of fungi makes them different from plants?
A. Fungal cells are eukaryotic.
B. Fungi are multicellular.
C. Fungi are heterotrophic.
D. Fungi have cell walls.
Answer:
C. Fungi are heterotrophic.
Explanation:
Mushrooms are a type of fungus. Fungi are heterotrophic, this characteristic of fungi makes them different from plants.
Which stage is the dominant stage in mosses?
A. Sporophyte
B. Spores
C. Gametophyte
D. Gametes
Answer:
The answer is Gametophyte
Explanation: Hope this helps and gl :) mark as brainliest if u want :)
Which genotype represents a heterozygous?
hh
HH
Hh
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. This would be Hh.
Answer:
Hh
Explanation:
Hh genotype represents a heterozygous.
Can you guys please help me? I really need to finish this asap. Thanksssss <3
At one time, scientists classified fungi as non-photosynthetic plants. What is one characteristic of fungi that led scientists to realize that fungi are not plants?
a. Their cells do not contain nuclei.
b. Their cell walls contain chitin.
c. Some live in symbiotic relationships.
d. They reproduce both sexually and asexually.
Answer:
b
Explanation:
their cell walls contain chitin unlike plant cell walls which contain cell walls
How many amino acids must be obtained in the diet because they cannot be made by the body?
2
5
10
20
amino acids we obtained in the diet about 10
Question 5 of 10
Which is caused by the uneven heating of air?
A. Altitude
B. Wind
C. Humidity
D. Rain
SUBMIT
Need help ASAP
Answer:
B. Wind
Explanation:
Wind is the movement of air, caused by the uneven heating of the Earth by the sun and the Earth's own rotation. Winds range from light breezes to natural hazards such as hurricanes and tornadoes.
Explain how the formation of a submergent coastline differs from the formation of an emergent
coastline.
Answer:
One occurs when sea level rises whereas the other happens when the sea level drops.
Explanation:
The main difference between Submergent coastlines and emergent coastlines because Submergent coastlines formed when sea level rises or in other words, the land sinks down. Examples of submergent coastlines are estuaries, barrier bars, and barrier island systems while on the other hand, emergent coastlines occurs when sea level drops or the land rises. Hudson Bay and Eastern Coastal Plains are the examples of emergent coastlines.
When ocean water freezes this leaves behind water that is saltier and denser.
True or false ?
Answer:
trye
Explanation:
it just is
What is the function of hemoglobin?
A. to carry oxygen
B. to carry carbon dioxide
A. To carry oxygen
hope it is helpful to you
Earth scientists have concluded that the methods of harnessing energy that have been used over the past two centuries, such as the burning of fossil fuels, are causing climates around the world to change more quickly and suddenly than ever before in human history. Evidence includes increased air temperatures, rising sea levels, and the shrinking of glaciers in Greenland, Alaska, and other regions of Earth. The most complex level of organizational hierarchy that climate change could potentially affect is Earth’s
biosphere.
communities.
organisms.
populations.
The most complex level of organizational hierarchy that climate change could potentially affect is Earth's biosphere.
What is biosphere?
The biosphere refers to the global ecological system that encompasses all living organisms and their interactions with the physical environment. It includes various interconnected ecosystems, such as forests, oceans, grasslands, and deserts, along with the diverse array of species and their habitats.
Climate change, with its wide-ranging impacts on temperature, precipitation patterns, and other environmental factors, can disrupt ecosystems and alter the distribution and abundance of species within the biosphere. These changes can have cascading effects on communities of organisms, populations of species, and the overall functioning of ecosystems. Therefore, the biosphere represents the highest level of organization that climate change can potentially impact.
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How are the melting and boiling point of steel pot useful to us
Answer:
Explanation:
Pot metal is generally used for parts that are not subject to high stresses or torque. Items created from pot metal include toys, furniture fittings, tool parts, electronics components, automotive parts, inexpensive jewelry.
The melting and boiling point of steel pot useful to us as it can be changed via need of product.
Pot steel is normally used for elements that aren't concern to excessive stresses or torque. Items constituted of pot metallic consist of toys, fixtures fittings, device elements, electronics components, automobile elements, less expensive jewelry.
What is boiling factor ?
The boiling factor of a liquid varies in keeping with the carried out strain; the everyday boiling factor is the temperature at which the vapour strain is identical to the same old sea-degree atmospheric strain (760 mm [29.92 inches] of mercury). At sea degree, water boils at 100° C (212° F).
Thus it is well explained.
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Which of the following statements accurately describes the rock cycle?
Question 1 options:
A. Sedimentary, igneous, and metamorphic rocks are formed and broken down
B. The rock cycle only describes the formation of rocks, not the transportation or deposition
C.The rock cycle only describes the formation of rocks above ground
D.The rock cycle only describes how igneous rocks are formed
Answer: The Answer would be A
Explanation:
what is the primary source of engery in a food chain ?
What would happen if there were no greenhouse gases to trap heat?
Answer:
The Earth would be covered in ice and be about -18°C in temperature.
Explanation:
Greenhouse gases in the air, mainly carbon dioxide, methane and water vapour, trap radiation from the Sun and work as a thermal blanket around the planet. Without the Greenhouse effect, the Earth would be ice-cold.
The principal reason we consider tunicates similar to the ancestor of all chordates is that Select one: a. tunicates have a lophophore-style mouth. b. tunicate adults are very similar to the ancestors of cephalochordates and vertebrates. c. tunicate larvae are primitive in all of their features. d. tunicate larvae possess the synapomorphies of adult chordates and thus reveal close evolutionary relationships with chordates. e. the body plan of adult tunicates parallels that of chordates.
Answer:
d. tunicate larvae possess the synapomorphies of adult chordates and thus reveal close evolutionary relationships with chordates.
Explanation:
In evolutionary biology, a synapomorphy is a shared, derived character/trait which is present in an ancestor and its descendants. Synapomorphies are useful markers to establish phylogenetic relationships between sets of taxa. Tunicates (subphylum Tunicata) are sessile marine invertebrates that are considered chordates (phylum Chordata) because the larval stage has characters/traits that are similar to other chordates. Larval tunicates have a nerve cord, a notochord, tail and gill slits (conserved in adults).
Explain the difference in How the tree and the fox get carbohydrates to use for energy
Hey Hey!
Hmm... This seems to be a simple questions. Plants/trees actually make their own carbohydrates through photosynthesis. A fox simply eats food and that is their carbohydrate source. Please mark brianliest<3!
help please
answer these questions and give the reasoning
Answer:
can i see the question plz so that I can help you