What is a global hectare (gha)?
Chloroplasts contain chlorophyll and carotenoids. Chlorophyll directly absorbs light for use in photosynthesis.
Carotenoids absorb light and transfer the energy from light to chlorophyll. The efficiency of photosynthesis varies with
the wavelengths of the light that illuminates the chloroplasts. In an experiment to study the relationship between the
incoming light wavelengths and the chemical reactions of photosynthesis using a species of green algae, a researcher
labeled the COt2 supply to the algae with 14C, and the H20 with 180.
Which of the following results is expected?
O More 14C is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red
light.
O More 180 is found in the algae when it is illuminated by green light than when it is illuminated by blue-violet and red
light
O More 14C is found in the algae when it is illuminated by blue-violet and red light than when it is illuminated by green
light.
O More 180 is found in the algae when it is illuminated by blue-violet and red light than when it is illuminated by green
light
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Answer:
D
Explanation:
Correct me if I'm wrong
An idea in science is supported or rejected after several
Question 23 options:
publications
experiments
alterations
meetings
Answer:
experiments
Explanation:
Answer:
experiments
Explanation:
I took the test
10. What enzyme unzips or breaks apart DNA for replication?
A. Helicase
B. Ligase
C. Polymerase
D. Okazaki
Answer:
a. Helicase Helicase the double helix bond is broken.
what animal kingdoms were divided
Answer:
The scheme most often used currently divides all living organisms into five kingdoms: Monera (bacteria), Protista, Fungi, Plantae, and Animalia. This coexisted with a scheme dividing life into two main divisions: the Prokaryotae (bacteria, etc.) and the Eukaryotae (animals, plants, fungi, and protists).
4.
What is the importance of biodiversity to humans and to ecosystems?
Answer:
Ecological life support- biodiversity provides functional ecosystem that supply oxygen, clean air and water, pollination of plants, pets, control, wastewater treatment and many ecosystem services.
Explanation:
looked it up
In those parts of equatorial Africa where the malaria parasite is most common, the sickle-cell allele constitutes 20% of the b hemoglobin alleles in the human gene pool. In the United States, the parasite that causes malaria is not present, but African-Americans whose ancestors were from equatorial Africa are present. What should be happening to the sickle-cell allele in the United States, and what should be happening to it in equatorial Africa
Answer:
directional selection, stabilizing selection
Explanation:
Directional selection is a type of natural selection that favors one extreme phenotype over other phenotypes, thereby modifying allele frequency in the direction of the favored phenotype. This type of positive selection is the main cause of phenotypic diversification. In the USA, the environment created a selection pressure that favored individuals that don't have the defective sickle-cell allele, thereby reducing its frequency in this population. Stabilizing selection, also known as balancing selection, is a type of natural selection where the most common phenotype is selected in the population, thus predominating in future generations. In equatorial Africa, the defective sickle-cell allele is present in a high frequency because individuals that are heterozygous for this allele are less susceptible to malaria, and therefore balancing selection should maintain this allele in the African population.
In kolhbergs conventional stage of moral development moral decisions are based on?
A) nature and nurture
B) society’s expectations and laws
C) trust or mistrust
D) attachment and temperament
Answer:
b
Explanation:
what in your dna are responsible for determining the traits that are expressed in an organism
1. mutagens
2. replication
3. cell
4. gametes
5. genes
6. meiosis
Answer:
Genes
Explanation:
Gene. A segment of a DNA molecule (a sequence of bases) that codes for a particular protein and determines the traits (phenotype) of the individual. A gene is the basic unit of heredity in a living organism.
Skim the headings and bold words in this section. Write four steps scientists might take to solve a problem.
Answer:
1) Create a hypothisis 2) Create experiment 3) collect data 4) write conclusion
The four steps that a scientist uses to solve a problem are creating hypothesis, experiment, data sorting and writing conclusion.
What are hypothesis?A hypothesis is an elaboration posited for a characteristic. The scientific technique requires that a hypothesis be testable in order for it to be considered a scientific hypothesis.
Scientists typically base scientific hypotheses on previous findings that cannot be adequately explained by existing scientific theories.
Any process that co-ordinate system data into some defined order to make it simpler to understand, analyze, or visualize is referred to as data sorting.
The conclusion is the final section of an academic essay. The conclusion should restate your response to the question and briefly summarize key points. It does not contain any new points or information.
A scientist solves a problem by developing a hypothesis, conducting an experiment, sorting data, and writing a conclusion.
Thus, by using these steps, scientist can come to an end for the problem.
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6. In general, as both the force and velocity of impact increase, what happens to the diameter of
the resulting blood droplets?
Answer: depending on viscosity, mass and velocity of impact, if droplet integrity is maintained, as velocity increases, diameter will increase from
Approximately d*sqrt(2) to 2*sqrt(d^3/6a) where d is original diameter and a is thickness when the droplet flattens into a disc.
Explanation:
This applies generally to any liquid droplet, which by inference falls and impacts a solid surface. The impact force is mgh where m= mass, g= acceleration due to gravity, h= initial height.
A liquid droplet deforms on impact. Assume the drop is sperical, then the deformation distance, d= diameter of the droplet then the average impact force = mgh/d.
The droplet may spread, splash or bounce, depending on viscosity and force, which depends on mass and velocity immediately before impact.
All than can be said is that if the droplet maintains integrity it could achieve the shape of half a highly flattened oblate spheroid. Approximating this with a flattened disc of thickness a, and an original volume of 4/3pi(d/2)^3, the volume as a disc =a*pi*r^2 so the horizontal diameter = 2*sqrt(d^3/6a)
It is not really possible from the available data to determine whether the droplet would remain its integrity, but at sufficiently low force/velocity, the droplet could retain a near-hemispherical shape, giving a horizontal diameter of the hemisphere = d*sqrt(2)
As velocity increases, if integrity is maintained, the diameter will increase from the second approximation to the first
can someone please help me
Answer:
A. Tap water is a homogenous mixture and distilled water is a pure substance.
Explanation:
Tap water can be classified as a homogeneous mixture because it contains equal amounts of dissolved minerals and other chemicals that are even throughout the mixture.
In the other hand, distilled water is classified as a pure substance because it contains definite amount of atoms of elements and unique chemical properties that forms water.
If the sodium/potassium ion pump were to stop functioning, what would eventually happen to the concentration gradients of sodium and potassium ions across the membrane
Answer:
The correct answer would be - concentration gradient will reach to equilibrium.
Explanation:
If the Na+/K= ion pump stops working which is to pump the sodium and potassium ion across the cell membrane. The movement takes place in 3:2 ratio with the help of ATP.
Eventually, the concentration gradients of sodium and potassium would be equal and found equilibrium across the membrane. This equilibrium would be reached due to passive transport that occurs in either direction across the membrane.
The type of selection where the characteristics on both extremes are selected against is
Answer:
stabilizing selection
Which relationship is an example of commensalim?
A large bowl contains a mixture of soil and iron powder. What would be the best way to separate the iron powder from the soil?
Answer:
Add magnet to the bowl, cover the bowl, and shake well
Explanation:
Anything with MAGNET
The most common presenting sign/symptom with rheumatic fever is a. rash. b. painless nodules. c. polyarthritis. d. cardiac murmur.
Answer:
c. polyarthritis.
Explanation:
Rheumatic fever is an inflammatory disease that may affect different parts of the body including joints, heart, brain, and skin. It is a rare disease observed after a bacterial throat infection caused by Streptococcus (group A). The most common signs of this disease include swollen and/or tender joints (i.e., polyarthritis), especially in wrists, knees, elbows or ankles, fever, fatigue, pain in the chest, breathlessness, palpitations, etc. Rheumatic fever needs to be treated by antibiotics to eliminate group A Streptococcus infections.
two choice sorting device used in taxonomy
PLZ ASAP
A scientist is using a microscope to observe a type of
bacteria.
Which two structures would the scientist most likely see?PLEASE EXPLAIN WHY
A:nucleus and DNA
B:DNA and cell wall
C:cell wall and vacuole
D:vacuole and nucleus
Answer:
The two structures most likely to be observed by the scientist when looking at a type of bacteria under the microscope are cell wall and vacuole (option C).
Explanation:
Bacteria are prokaryotic organisms that lack a nucleus, most of the organelles, and whose DNA is dispersed in the cytoplasm. Some types of bacteria have a plasma membrane surrounded by a cell wall, and may be equipped with vacuoles to perform their functions.
It is very likely that two structures that are most likely to be differentiated when a type of bacteria is observed under the microscope are the cell wall and the vacuole, according with information above.
The other options are not correct because:
A and D. Bacteria lack a nucleus.
A and B. Bacterial DNA is dispersed in the cytoplasm and is very difficult to observe under the microscope.
Answer:
cell wall vacuole
Explanation:
What are the three goals of integrated pest management (IPM)?
A) to reduce the use of insecticides, increase consumer costs, and
conserve water
B) to reduce the use of insecticides, increase farmer costs, and conserve
water
C)to reduce the use of artificial pesticides, reduce costs, and control pests
D) to reduce the use of artificial pesticides, reduce costs, and increase
salinization
Please select the best answer from the choices provided
Ο Α
B
The correct answer is C. To reduce the use of artificial pesticides, reduce costs, and control pests.
Explanation
Integrated pest management (IPM) is a method that integrates different practices and scientific principles to make adequate management with pests. This method considers knowledge about the habits, life cycle, needs, and aversions of the pest, reducing the use of toxic methods and implementing less toxic methods, monitoring pest activity and adjusting methods over time, tolerating harmless pests, setting a threshold to decide when it is time to act, among others as its main principles. Therefore, the correct answer is C. To reduce the use of artificial pesticides, reduce costs, and control pests.
which wall structures are found in plant cells but not in animal cells check all that apply
cell wall
cell membrane
endoplasmic reticulum
nucleus
chloroplasts
mitochondria
Answer:
cell wall, chloroplasts
Explanation:
no explanation, just the correct answer
Answer:
Options: A and E
Explanation:It was correct on edg 2021, Have a blessed day.
If two hybrid tall pea plants are crossed what is the probability that the offspring will have the tall phenotype?
Answer:
There is a high probability that the Pea plant will have a High phenotype!
Explanation:
Because both "parent plants" are tall, this will cause the offspring to also be tall, this will be because it in it's genes or in other words DNA too be strong.
Which statement best
summarizes agricultural technology
over time?
A. Agricultural technology has
continually advanced over time, with
significant leaps forward during the
Agricultural Revolution and the Green
Revolution.
B. Agricultural technology
advanced quickly during the
Agricultural Revolution and the Green
Revolution but hasn't advanced since.
C. Agricultural technology didn't
advance before the Green Revolution.
D. Agricultural technology didn't
advance before the Agricultural
Revolution.
Agricultural technology has evolved over time, with significant leaps during the agricultural and green revolutions.
Agricultural revolutionAgriculture has been one of the sustainers (along with hunting) of early men and as such, has seen gradual development with time. Man has always been looking for better ways to do things in order to achieve outcomes.
With the era of the agricultural revolution, there was a huge transition of humans from the primitive lifestyle of hunting and fruit gatherings to that of agricultural settlements. Better ways to carry out crop production started receiving huge attention. from there, hand-made agricultural equipment started surfacing.
The green revolution has agriculture receiving utmost attention in terms of technological innovations. Farm machinery, agrochemicals, etc, started coming up with the result being a massive increase in crop production and general outputs.
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Help me now please!!!!!!!!
Help. It is due today
Answer: B
Explanation: tadpoles lack limbs and possess longtails, adult frogs on the other hand have two hind limbs and two fore limbs
which image shows a non renewable resource?
1
2
3
4
Journal
1. The following are the functions of the skeletal system, except
a. It gives shape to the body
b. It serves as the framework of the body.
c. It protects the internal organ of the body.
d. It circulates oxygen and removes carbon dioxide.
2. Why is bone marrow important to the body?
a. It stores much fat.
b. It makes the bone strong.
c. It produces red blood cell.
d. It produces new bone cell.
Answer:
1.
Answer: D
2.
Answer: A,C,D
What is relationship between genes dna and proteins
Answer:
genes are created by proteins. dna is created by genes
Explanation:
what are the reproductive systems of insects?
Hey! Your answer to this question..
What are the reproductive systems of insects?
Insects that’s is female can make eggs, receive and store sperm, manipulate sperm from different males. They can also lay eggs of course. Insects reproductive systems are made of a pair of ovaries, accessory glands, one or maybe even more spermathecae, and lastly ducts connecting these parts. The ducts and spermathecae are line with a cuticle.
Bam hi cuts between what bases