Answer:
it's option D
Explanation:
scientist specialize in that area because single celled organisms form the basis of evolution. According to the scientist the first living thing on Earth were the single celled organisms.
Answer:
single-celled organisms are the least understood in the ocean
In the presence of lactose, how long does it take for the lac operon to be expressed?
(A) when glucose is more than lactose concentration
(B) when lactose equals glucose concentration
(C) as long as lactose is more than galactose concentration
(D) as long as lactose is more than glucose concentration
Answer:
the lactose Expresses as long as it is present. when all lactose is converted into glucose and galactose, the reaction stops
Why are there largely a larger number of producers than tertiary consumers in an ecosystem?
A. Only about half of the energy passes on to the next organism in a food chain, so there needs to be more of the living things lower in the energy pyramid to support the living things higher in the pyramid.
B. All of the energy is passed from level to level in the energy pyramid, so the number or tertiary consumers is always higher.
C. Only about 10% of energy is passed on to the next organism in a food chain, so there needs to be more of the living things lower in the energy pyramid to support the living things higher in the pyramid.
Answer:
C
Explanation:
the more higher up you go on a pyramid, the lower energy you get
In a certain type of plant, the gene for red flowers in a dominant and the gene for yellow flowers is recessive. If a purebred plant with red flowers was crossed with a purebred plant with yellow flowers, what color flowers would the offspring have?
Answer : Yellow
Explanation : Because purebred plants have lighter colored dominence .
Why is quality control important for forensic DNA labs?
Question 2 options:
1)
Establishes methods for maintaining the quality of its product
2)
It means that the lab cannot produce bad results
3)
Avoids presenting errors in court
4)
Keeps bad or unskilled DNA analysts from testifying
Answer:
3). avoid presentation errors in court
Explanation:
hope it helps thanks ❤
Which statement describes all stable ecosystems?
1) Herbivores provide energy for the autotrophs,
2) The populations of predators are dependent on
the populations of their prey.
3) The number of autotrophs equals the number of
heterotrophs.
4) Consumers synthesize ATP from light energy.
Stable ecosystem has the populations of predators are dependent on the populations of their prey of predators .
What is ecosystem?An ecosystem is a geographic area where plants, animals, and other organisms, as well as weather and landscape, work together to form a bubble of life.
Who are predators ?Predators are organisms that hunt and kill other organisms for food. The organisms that are consumed by the predators are known as the prey.
Stable ecosystem has the populations of predators are dependent on the populations of their prey of predators .
Hence, option 2 is correct
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A bird that preys on moths is introduced to the habitat with moths and trees like the ones shown below. What will most likely happen to the population of the moths in this habitat?
Answer:
It will decrease
Explanation:
what is difference between biology and chemistry
biology is about cells and the body
chemistry is more elements and molecules
Answer:
Biology is the study of life or to precise, living organisms and how they react whilst chemistry is the study of the reaction of substances and their properties.
Explanation:
Biology is more of organisms like humans and how they react to things
Chemistry is more of how substances react and their properties
A 56-year-old man with an insufficient aortic valve is scheduled for surgery. Identify the chamber of the heart that the regurgitated blood most likely enter. Will the blood regurgitated primarily during systole or diastole?
Answerand Explanation:
The regurgitated blood will enter the left chamber of the heart. This is because as the patient's aotic valve is not working properly, it does not close properly, which allows a backflow of blood to occur towards the left chamber of the heart, as this chamber relaxes to be filled with blood pumped by the right camera.
As the regurgitated blood is a pumped blood, we can consider that it will happen, mainly during systole, which is the moment when the heart contracts to pump blood. This contraction will be made with the malfunction of the aortic valve which will cause blood regurgitation.
What is stimulated by high extracellular fluid volume (ECFV) and works to increase GFR and urine output?
Stretching of the atrial muscle cells releases a hormone called atrial natriuretic factor (ANF). ANF relaxes the juxtaglomerular (JG) cells of the afferent arteriole and thereby increases GFR and urine output.
The total magnification produced from a 15x ocular and a 4x objective would be
The correct answer will get Brainliest!
Calculate the diversity of the community below using Simpson's diversity index. Provide your answer to the nearest hundredth.
An area of the black forest in Germany contains 134 pitch pines, 24 Douglas firs, and 53 red pines.
Answer:
Diversity of the community = 2.097
Explanation:
Given:
Number of pitch pines = 134
Number of douglas firs = 24
Number of red pines = 53
Find:
Diversity of the community
Computation:
Simpson's diversity index = N(N-1)/Σn(n-1)
Particular n n(n-1)
Pitch pine 134 17822
Douglas firs 24 552
Red pine 53 2756
Total N=211 21130
So,
D= [211(211-1)] / 21130
D = 2.097
Diversity of the community = 2.097
The diversity of the community below using Simpson's diversity index. Provide your answer to the nearest hundredth is 2.097.
diversity of the community = N(N-1)
N= 21121130no. of
d= 2.097
What is Simpson's diversity index.?It is a measure of index that has diversity which takes into no. species.Itis calculated by nxn-1.
Ths it is well explained.
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which water pollutants can lead to excessive growth of water weeds
Answer: Water pollution also affects the ecosystem – it can cause a phenomenon called eutrophication. This can cause fish and other aquatic organisms to die. Toxic elements dissolved in water can make their way to humans through fish or other aquatic organisms.
https://byjus.com/biology/effects-of-water-pollution/
Explanation:
Answer:
Excessive nutrients (nitrates) from fertilisers are flushed from the land into rivers by rainwater. Oxygen levels reach such a low point that fish and other organisms suffocate. These nutrients cause increased aquatic plant growth of algae and other plants.
Explanation:
Match the hormone with the appropriate effect or description.
a. Secreted when blood calcium levels are too high
b. Inhibits osteoclast activity Calcitonin
c. Causes RANKL to be produced
d. Secreted by the parathyroid glands
e. Stimulates an increase in the number of osteoclasts
f. Secreted when blood calcium levels are too low
g. Secreted by the thyroid gland
1. Calcitonin
2. PTH
Answer:
a. Calcitonin
b. Calcitonin
c. PTH
d. PTH
e. PTH
f. PTH
g. Calcitonin
Explanation:
Calcitonin is a short peptidic hormone secreted by the parafollicular cells of the thyroid gland. Conversely to the parathyroid hormone (PTH), calcitonin reduces the calcium level in the blood. If the calcium concentration in blood decreases, the concentration of calcitonin secreted decreases too. On the other hand, the PTH peptide hormone is an important hormone secreted by the parathyroid glands that affect bones and tissues. PTH stimulates the proliferation and activity of the osteoclast (specialized cells that play a crucial role in bone resorption) in order to increase calcium levels in the blood. PTH stimulates the expression of the receptor activator of nuclear factor-kappa-Β ligand (RANKL) protein, thereby activating osteoclast differentiation and inhibiting osteoclast apoptosis.
2. studies the genomes of different species and
how they are related
Explanation:
Comparative genomics is a field of biological research in which the genome sequences of different species — human, mouse, and a wide variety of other organisms from bacteria to chimpanzees — are compared.
Click the - button that is to the left of the intensity scale to zoom out such that the top of the scale is at 100. Move the temperature slider to that of the Sun. The red part of the thermometer on the far right should just be touching the line marked Sun. Approximately what temperature is the surface of the Sun?
Answer:
5,500°C - 6,000°C
Explanation:
Approximately, 5,500°C - 6,000°C temperature is the surface of the sun.
What is thermometer?
An instrument for measuring and indicating temperature, typically one consisting of a narrow, hermetically sealed glass tube marked with graduations and having at one end a bulb containing mercury or alcohol.Which expands and contracts in the tube with heating and cooling.Learn more about thermometer below,
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Please help pleaseeeeee
Answer:
ribosome
Explanation:
A pH value of ____ has the highest concentration of hydrogen ions.
Answer:
0
Explanation:
Since the number 14 would be the value to have the strongest base in the pH scale, it would only make sense that 0 is the most acidic.
Blood and water flows a weupe
TON 9
ians do not rely on their lungs alone for breathing in air. They need the skin a
adequate intake of oxygen. Which of the statements below explains the reason
mphibians have only one lung to breathe in air
nly a small amount of air enters the lungs as they breathe.
surface area of the lungs are small compared to other terrestrial vertebrat
surface area of the lungs do not have folds compared to other terrestrial v
Answer:
These lungs are primitive and are not as evolved as mammalian lungs. Adult amphibians are lacking or have a reduced diaphragm, so breathing through the lungs is forced. The other means of breathing for amphibians is diffusion across the skin. To aid this diffusion, amphibian skin must remain moist.
Two common respiratory organs of invertebrates are trachea and gills. Diffusion lungs, as contrasted with ventilation lungs of vertebrates, are confined to small animals, such as pulmonate snails and scorpions.
Explanation:
Amphibians utilize gills for breathing early in life, and develop primitive lungs in their adult life; additionally, they are able to breathe through their skin.
All vaccines are produced from dead or weakened:
a
Phagocytes
b
Allergens
c
Earthworms
d
Pathogens
Answer:
d
Explanation:
because that is the virus and they put the virus in all vaccine but weakend
The diagram below does not represent a sustainable energy pyramid in an ecosystem because
Answer: more energy must be available in the producer level than in the consumer levels
Explanation:
Reproduction is important for every type of living thing. Without it, species would die out. To ensure their survival, animals have developed unique adaptations to improve their chances of reproducing. Behavioral adaptations are behaviors an organism performs to help it survive. Structural adaptations are physical features that help an organism survive.
The image below shows two peacocks. The male peacock is large and brightly colored. The female peacock is not as colorful. The size and color of the male's feathers attract females. This is an example of a structural adaptation intended to help with reproduction. Another structural adaptation is when male deer grow large antlers to attract females. Animals also use behavioral adaptations to attract mates. For example, male frogs sing to attract females and male spiders dance to attract females.
Plants also have adaptations to help with reproduction. While animals use behavioral and structural adaptations to improve reproduction, plants only use structural adaptations. For example, brightly colored flowers attract butterflies. Certain flowers also have nectar or give off an odor to attract insects. Attracting butterflies and other insects is important because they play a role in reproduction by pollination.
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
Answer:
B. Elks attach leaves and grasses to their antlers to help them appear larger
Explanation:
The above option is the correct answer.
As elks appear larger, it tend to make other male elks to be scared to fight that particular elk for a female elk. Also, the female elk becomes more attracted to larger male elk.
Male elk are known to actually retain their antlers for more than half the year. Such elks do not likely group themselves with other males when they have antlers.
10. Which process uses special proteins on the surface of the membrane
to identify specific molecules for transport into the cell?
a. phagocytosis
b. pinocytosis
C. receptor-mediated endocytosis
d. exocytosis
Answer:
C. Receptor-mediated endocytosis
Put the sentences below in the correct order, numbering then from 1 through 12 on the lines provided. Read each statement before you decide the order in which they occurred.
Answer:
7 1 2 5 9 4 11 10 3 6 12 8
Explanation:
This is the right pattern because it was easy
which leaf carries out more photosynthesis and explain why
Answer:
Explanation:
palisade layer
The upper, palisade layer captures most of the sunlight and carries out most of the photosynthesis. The columnar cells of the palisade layer contain many chloroplasts.
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Answer:
1. a
2. b
3. b
4. c
Explanation:
A zygote is best described as
A. a blastocyst attached to the placenta through the uterus
B. a sperm or an egg
C. any haploid cell
D. the first cell with DNA from both parents in its nucleus
Answer:
A zygote is D. The first cell with DNA from both parents in it’s nucleus.
Explanation:
A zygote is the unison of a sperm and an egg cell as to where the genetic information is combined in the fusion of the two parents haploid cells. Therefore it would be the first cell that contains DNA in the nucleus from both parents.
I hope this helps! :D
In a cell undergoing meiosis, during which stage do the sister chromatids separate from each other?
anaphase l
anaphase ll
telophase l
telophase ll
Answer:
anaphase ll
Explanation:
anaphase ll
BRAINILIEST PLEASE
How does an ATP molecule release
energy for cells?
A. changing the base, adenosine, to guanine
B. breaking the bond between the 2nd and 3rd
phosphate
C. removing the ribose sugar
Answer:
The correct answer is - B. breaking the bond between the 2nd and 3rd.
Explanation:
ATP molecule is known as cellular currency as it provides energy for cellular functions. ATP released energy when one phosphate group is removed or eliminated by breaking a phosphoanhydride bond. The rebreaking of this bond and removal is known as hydrolysis, and ATP is converted to adenosine diphosphate (ADP).
Breaking the bond between the 2nd and 3rd phosphate groups provides a very high amount of energy. There is also additional energy released when phosphate is removed from ADP to form adenosine monophosphate (AMP).
period between two periods of mitosis
Answer:
The period between mitosis divisions - that is , G1 , S and G2 - is known as interphase....cheng made a chart to list the functions of certain fish structures
which headings correctly complete the chart?
a) x: fin
y: swim bladder
z: lateral line
b) x: fin
y: lateral line
z: swim bladder
c) x: lateral line
y: swim bladder
z: fin
d) x: lateral line
y: fin
z: swim bladder
About the question:
You will find the chart in the attached files
Answer:
b) x: fin
y: lateral line
z: swim bladder
Explanation:
The dorsal fin is found in the dorsal region of the fish body. Depending on the species, there can be one or two dorsal fins. Membranous structures and bony or cartilaginous ratios compose the fins. One of the main functions is to stabilize the body in water, providing equilibrium. When the dorsal fin is erect, it acts as a keel, helping the fish not to turn aside. Fishes also use these fins as protection because the cartilaginous or bony ratios act as spines. The animal uses these spines to defend itself from predators. The morphological variety of dorsal fins in the different species is used in taxonomy.
The Lateral Line is a system or sensory organ composed of special receptors called neuromasts, which can be found all along the lateral region of the animal. The lateral line perceives information from the environment, such as light, sound, or water movement, among others. These signs are translated into nervous messages. The lateral line is useful to detect prey, predators, other animals moving, objects, etcetera. It is significant for intraspecific interaction, especially during swimming motions in schools. The lateral line receives perturbations of short distance, generated by other living beings or by objects. Some studies confirm that the lateral line is also sensitive to chemical stimuli.
The swim bladder is a neumatic sac-like structure filled with gases coming from the blood. Its main function is to allow neutral floating and let the animal in suspension at any depth, with no need for muscular effort. The animal can regulate the size of the bladder. This organ can be found in most pelagic fishes, while the benthonic ones or the ones that actively swim lack it.
Answer:
person is right. B
Explanation: