Answer:
Even in a chemical reaction when atoms interact and create new products, mass is conserved. This is because the new substances created are composed of atoms that were present in the reactants. The atoms from the reactants come apart, rearrange, and re-bond in a different arrangement to form the products.
help I will mark as brainliest
Answer:
z and y only
hope it helps ☺ ☺
how can explain that man is the cause for destruction of natural resources
1
The diagram below represents a food chain in a garden.
Rose
Greenfly
Ladybird
Blackbird
A food chain in a garden
1.1
Name the organism above that represents the following:
(a) Herbivore
(b) Producer
(1)
(1)
1.2
A rose bush contains 1 000 kJ/m2 /year of energy and only 10% of this
energy is passed on at each trophic level of the food chain. How much
energy will be passed on to the blackbird? Show ALL your calculations.
(4)
1.3
If all the greenflies in this garden were removed, explain what would
happen to the populations of the following:
(a) Rose plants
(b) Ladybirds
(C) Blackbirds
(2)
(2)
(2)
(12)
Answer:
The correct answer is -
1.1 A. herbivore - greenfly
b. producer - rose
1.2. 1 kJ/m2/year
1.3 rose plants will increase, ladybirds will decrease, blackbirds will decrease.
Explanation:
In this food chain,
Rose >>Greenfly >>Ladybird >>Blackbird
Rose plants are the producers as they generate their food and energy and does not depend on other organisms where as greenfly are the primary consumer or herbivore as they depend on the rose plant for their food and energy only, however, ladybird as secondary consumer and blackbird as tertiary consumer depend on greenfly and ladybird respectively.
If rose plants have 1000 kJ/m2 /year of energy and as it is known that only 10% moves to the next tropic level then blackbird would have:
rose = 1000
greenfly = 1000*10/100= 100 kJ
ladybird = 100*10/100 = 10kJ
blackbird = 10*10/100 = 1 kJ
If greenfly removes from here the rose plant will increase as these depends and eat rose plants and lady bird will decrease as these are the primary source of food for lady bird and if ladybird decrease blackbird also decrease.
hy please make some questions from this passage please i want to ask my students thank you
Explanation:
1) Write the balanced chemical equation of photosynthesis.
2) What is the role of chlorophyll in the process of photosynthesis?
3) What happens to the light energy that is absorbed by the chlorophyll?
1. Define physical change.
Explanation:
physical change is the change which does not cause change in its chemical composition like shape,size,colour,odour,melting point,boiling point etc
Which describes a similarity between abiotic and biotic factors?
Answer: They are both necessary for organisms to survive.
Explanation:
Abiotic factors refer to non-living physical and chemical elements in the ecosystem. Abiotic resources are usually obtained from the lithosphere, atmosphere, and hydrosphere. Examples of abiotic factors are water, air, soil, sunlight, and minerals. Biotic factors are living or once-living organisms in the ecosystem.
How many objects must be present in a system to demonstrate gravity as a force of attraction?
Answer:
Explanation:
Knowing the value of G allows us to calculate the force of gravitational attraction between any two objects of known mass and known separation distance. As a first example, consider the following problem.
noah created a model of a glacier to help explain how glaciers change the surface of Earth. He froze two large blocks of ice. One block was pure water. The pther was water mixed with sand and rocks. He took both blocks and rubbed them across a sheet of tinfoil. The block of pure water slid smoothly over the tinfoil. The block with sand and rocks ripped the tinfoil in many places. How does Noah's model explain how glaciers change Earths surface?
Answer: The model is depicting the glacier erosion.
Explanation:
The glaciers are responsible for causing erosion of the earth. They transport the materials away from the locations were they are earlier situated. They carve the materials present beneath the land. They erode the materials like soil, pebbles, boulders, against the pressure of the unstable mass of the ice moving down the slope. The broken ice mass carriers away the broken rocks, materials and soil debris far away from the places where they have been originally situated. This causes the glacial erosion. Also the broken and displaced rocks displace the soil and other materials come in contact with during erosion.
According to the given situation, the ice formed with water only had no impact on the tinfoil on the other hand the ice containing the sand and rocks removed the tinfoil from places. This is because of the friction created by the sand and rocks on the tinfoil. The glacier material like ice, soil, rocks due to friction erode the material come in contact with it with an appreciable pressure underneath.
PLEASE HELP WITH THIS!!!
Answer:
my mama is my mom
Explanation:
mum gae
Which statement describes the role of decomposers in moving nutrients through a food web?
Answer:
Every part of an ecosystem is vital to its survival – from the green plants to furry animals and microscopic bacteria. The group of organisms called decomposers forms the final link in the food chain. They break down dead animals and plants and return vital nutrients to the soil.
Explanation:
A kitten embryo is growing inside the uterus of a cat. What is happening to the cells of the kitten embryo?
A) Mitosis, the cells are differentiating
B) Meiosis, the cells are differentiating
C) Meiosis, the genes are being shuffled around
D) Mitosis, genes are being shuffled around
Please answer and don't put fake answer I really need this right.
An ecosystem with great biological
diversity decreases –
F the number of species present in
the ecosystem
G competition between different
species in the ecosystem
Havailable space for organisms in
the ecosystem
J available food supply for
organisms in the ecosystem
Answer:
H and J
Explanation:
F With great diversity comes and increase in species
G with an increase of animals there is an increase in competition not a decrease
H and J both seem right since the more animals the more competitive it is for space and food
DNA sequence that codes for glycine
If a mosquito feeds on a bird that is infected with the West Nile Virus and then feeds on a human
being who then contracts the virus, what role is the mosquito playing in the infection of the person?
Header
Header
The host
The pathogen
The vector
The parasite
The symbiotic
Answer:
The pathogen
Explanation:
If an organism has a diploid number of 54, how many chromosomes will be in each of its gametes?
a. 54
b. 52
c. 27
d. 104
e. 108
There will be 27 chromosomes in each of its gametes.
• Meiosis is also called reductional division, in the process s-ex cells, that is, sperm and egg are produced, and each cell has the half number of chromosomes than its parent cells.
• In the given case, the organism is diploid with 54 chromosomes, that is, 2n = 54.
• Here n is the haploid number of chromosomes, in the given case, n = 27, that is, the haploid number of chromosomes is 27.
• Therefore, the sperm and egg cells have 27 number of chromosomes each.
Thus, the correct answer is option c, that is, 27.
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Come up with a summery of what physical science is I’ll give brainliest
Which of the following descriptions correctly defines gametes
Skin cells
Sex sales or sperm and egg cells
The diploid cell that comes from the fertilization of an egg cell by sperm cells
All of the above
Answer:
Sex sales or sperm and egg cells
Explanation:
Someone help thank you
Answer:
because its faster
Explanation:
Suppose an explorer discovered a unique new species of plant and collected a sample for analysis by a geneticist. The geneticist then isolated chromatin from the plant sample and examined the chromatin using electron microscopy. The chromatin observed was organized in a way that is similar to beads on a string A small amount of nuclease was then added, which was observed to cleave the string into individual beads that each contained 280 bp of DNA.
Histone H1 H2A H2B H3 H4 H7 (new histone)
Percentage 12.5% 25% 25% 0% 26%
After thorough digestion with more nuclease, only a 120 bp fragment of DNA remained attached to a core of histone eins. Analysis of the histone core revealed the data dicated in the table to the right.
Using the data provided, determine the conclusions that the geneticist could make about the likely structure of the nucleosome in the chromatin of this new plant species
A. The nucleosome core contains a heterodimer of the histones H7 and H1
B. The nucleosome core contains two each of histones H2A, H2B, and H4
C. The nucleosome core contains a homodimer of the histones H2A, H2B, and H4
D. The nucleosome core contains one each of histones H1 and H7
E. The nucleosome core histone H7 replaces the standard histone H3
my brain can't process this lol
20. Which does NOT describe primary succession? *
O Decomposing organic matter forms soil
O Presence of existing fertile soil
O Long-term occurrence over extended time
Barren land once covered by glacier
help me plz I will give braialyest
Answer:
b
Explanation:
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Look at the Density of Substances table. Which two substances from the table are buoyant in pure water?
A. silver and lead
B. lead and diamond
C. gasoline and ethyl alcohol
D. silver and diamond
Answer:
Silver and lead
Explanation: hope that helps
What the answer for this
Answer:
A. CPR is an important skill that few Americans have.
Explanation:
The paragraph is talking about how not a lot of Americans know how to perform CPR.
When comparing the brightness of stars, it is
necessary to know the distance to each star.
vole
True
False
HELP PLS (20 POINTS)
What is the basic unit of DNA?
Question 21
Neurons of the cerebral cortex never dip into the medulla.
O True
O False
Answer:
False
Explanation:
The cerebral cortex refers to the outer layer of the brain. This layer is formed by a thin film of nervous tissue that surrounds the surface of the cerebral hemispheres, with primates having a much more developed cerebral cortex than other animals.
the cerebral cortex is a thin layer of neurons and neuronal connections which is embedded in the neocortex(the neuronal cells of the cerebral cortex which form in the deep layer), it is not homogeneous, since it is made up of six layers of cells, each with specific and specific functions.
Which of the following is not correct about diffraction?
Answer:
Diffraction occurs just with electromagnetic waves.
Explanation:
The information that should not be true about diffraction is that it arise with the electromagnetic waves only.
What is diffraction?It is considered as the process where the beam of light or the other system waves should be spread out that leads of passing via the narrow aperture or it should be an across of an edge that should be accompanied by interfering between the formation of the waves that should be generated.
So the above information should be considered.
learn more about diffraction here: https://brainly.com/question/15085704
A BISC 220 student went swimming at the Uytengsu Aquatics Center. Having missed an important lecture on the respiratory system, he thought it would be a good idea to hyperventilate for a minute before diving into the pool and swimming vigorously underwater. Shortly after he began swimming, he lost consciousness and would have drowned if not for the quick action of the lifeguard. Which one of the following best describes what happened?
A. Hyperventilation increased the Poz in his blood, which inhibited the brainstem respiratory center.
B. Hyperventilation decreased blood Pco2, which reduced respiratory drive at the same time that exercise increased the demand for O2
C. Skeletal muscle activity caused an increase in blood pH, which suppressed brain function and made him faint.
D. Hyperventilation increased the saturation of hemoglobin with O2, but vigorous exercise caused the bound O2 to be replaced by CO2
Answer:
B. Hyperventilation decreased blood Pco2, which reduced respiratory drive at the same time that exercise increased the demand for O2.
Explanation:
Hyperventilation is a breathing at an abnormal rate. There is an increased rate of loss of carbon dioxide which causes an increased demand for the oxygen. The respiration process is affected due to hyperventilation.
which advancement in technology helped reduce the amount of solid waste produced
A. Milking machines
B. Nuclear power
C. Electronic mail
D. Plastic containers
What is one element a topographic map shows?
Please help I have no idea
Answer:
plants
Explanation:
the is water everywhere
Answer: landforms
Explanation: