Which of the following best describes why polar bears are a sub-species of brown bears instead of a completely separate species?
A. Because they both have thick fur and 4 legs, so they are very similar
B. Because they both live on the same continent, so they can’t be two separate species
C. Because they can still breed in the wild. Once they no longer mate with brown bears, they will be considered a separate species
D. All of the above
More than 50% of ecosystems are currently being used unsustainably
T or F
When Engelmann exposed photosynthetic algae to light in the presence of aerobic bacteria, he found that some wavelengths of light produced a higher rate of photosynthesis, as evidenced by the number of bacteria gathered near the algae. Based on his results, what color of light did Engelmann find associated with the highest rate of photosynthesis?
A. Red and blue
B. Yellow and green
C. Yellow
D. Red
Answer:
A. Red and blue
Explanation:
Theodor Wilhelm Engelmann, born in 1843 and died in 1909, was a German scientist. He was the scientist who detected which wavelengths of light produced the best photosynthetic activity in green alga. In his experiment, Engelmann exposed the photosynthetic algae to different wavelengths in the light spectrum. He then added aerobic (oxygen-dependent) algae to see where they will accumulate the most in order to detect the best wavelength for algae photosynthesis.
He discovered that the aerobic bacteria accumulated in the parts of the algae exposed to red and blue wavelength of light. This is because the algae exposed to the red and blue light produced more oxygen due to increased photosynthetic rate. This attracted the aerobic bacteria, which needs oxygen, to that particular area with that wavelength.
Which of the following best describes why polar bears are a sub-species of brown bears instead of a completely separate species? A. Because they both have thick fur and 4 legs, so they are very similar B. Because they both live on the same continent, so they can’t be two separate species C. Because they can still breed in the wild. Once they no longer mate with brown bears, they will be considered a separate species D. All of the above
Answer:
d
Explanation:
A diet lacking macronutrients leads to health problems, whereas a diet lacking micronutrients
does not
True or false
Answer:
Micronutrient deficiencies form an important global health issue, with malnutrition affecting key development outcomes including poor physical and mental development in children
so i think its true
A diet lacking macronutrients leads to health problems, whereas a diet lacking micronutrients. Thus, the given statement is true.
What is Micronutrient?Micronutrient deficiencies form an important global health issue, with malnutrition affecting key development outcomes including poor physical and mental development in children.This type of diet comprises of macronutrients and micronutrients in which the former is responsible for provision of energy to the body.
A diet that is rich in fruit but lacking protein is a diet which is lacking in nutrients that will help hair, skin, and nails to grow. Correct answer: C The essential nutrients for hair,s kin and nails are protein, because hair and nails are made primarily of a protein called keratin, zinc, calcium, magnesium.This means that in order t support growth of the hair, nails and skin we should consume lean meat, chicken, lentils.
Therefore, A diet lacking macronutrients leads to health problems, whereas a diet lacking micronutrients. Thus, the given statement is true.
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What’s the color of the sky
Answer:
Sky Blue :)
Yw
Answer:
Blue
Explanation:
Alot of people are saying that the sky is every color in the world but I don't get that
Which diagram below best represents the surface features developed in a humid climate?
An eagle is a predator for squirrels. A new law stops humans from hunting
eagles, and the eagle population increases. What will happen to the squirrel
population?
O A. The squirrel death rate will increase.
B. The carrying capacity of the ecosystem will increase.
C. The ecosystem will reach Hardy-Weinberg equilibrium.
D. The squirrel population will increase.
Answer:
A. the squirrel death rate will increase
Explanation:
If there are more eagles, then there is more eagles that need to eat making squirrels one of targets
PLEASE HELP- EASY 7TH GRADE WORK!!!
Why is overpopulation dangerous?
A= There will be no competition for resources.
B= There will not be enough air for all members of the species to breathe.
C= There will not be enough food for all members of the species to survive.
D= Overpopulation will result in drastic climate change.
Answer:
D= Overpopulation will result in drastic climate change.
Explanation:
overpopulation is bad because the increased demand for resources such as fresh water and food, starvation and malnutrition, consumption of natural resources faster than the rate of regeneration, and a deterioration in living conditions.
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In science, a hypothesis must be a. correct. b. manipulated. c. controlled. d. testable.
Answer:
d. testable
Explanation: A hypothessi is like a guess. It needs to be tested to be proven.
What are four common types of drugs?
Answer:
Cannabis.
Cocaine.
Amphetamine.
LSD.
Explanation:
theyre the most common.
In which squares should the phrase “Yellow pods” appear?
The given question is incomplete however the correct question and the flow chart is related to the question as follows:
The flowchart below shows the three generations of a cross between a pea plant that has yellow pods and a pea plant that has green pods. yellow pods are the dominant trait. The flowchart is missing the labels that describe the traits.
In which squares should the phrase “yellow pods” appear?
1. A and D
2.B and E
3. A, C, and D
4. A, B, C, D, and E
Answer:
The correct answer is: 3. A, C, and D
Explanation:
According to Mendel’s laws of inheritance, when a plant with the dominant trait is crossed with a plant with a recessive trait, as a result, the dominant phenotype appears in all the F1 offspring. On Self cross F1 offspring, produces F2 offspring with dominant and recessive traits.
In the given scenario, pea plant with ‘yellow pods’ are dominant and pea plant with ‘green pods’ is recessive.
Therefore, when pea plant with yellow pods is crossed with the pea plant with the green pod, the F1 offspring (C) produced are with yellow pods.
Thus, parent (A) is with yellow pods and F2 offspring (D) is with yellow pods.
What is the purpose of a control sample that is known to be from a given
species in an eDNA surveillance for that species?
A. To identify samples containing the target DNA
B. To produce multiple banding patterns in a gel
C. To amplify the DNA in small samples
D. To identify every species found
Answer:
B. To produce multiple banding patterns in a gel
Explanation:
Helpp !
One part of the immune response that is specific to a particular pathogen is
the production of
O A. lysozyme molecules
O B. neutrophils
O C. macrophages
D. memory cells
Answer:
Memory cells
Explanation:
Just like with vaccines, the immune response to fight a specific pathogen
Explain what the term "Zero Waste" is all about. *
Answer:
zero waste means u are completely self sufficient up to th point where u have no carbon footprint
Explanation:
that is why its called zero waste
How did the elements begin to stratify?
What is the most environmentally friendly form of building?
A. Concrete
B. Brick
C. Steel
D. Timber
Answer:
D) Timber
Explanation:
Concrete creates a large carbon footprint as carbon dioxide is released during its production. Steel releases air emision like CO, SOx, NOx, PM2. Whereas, brick is made out of clay the heat required for manufacture is usually gained from coal burning releasing emissions into the atmosphere. Although timber contributes to deforestation when managed sustainably has the potential to be carbon neutral/sustainable.
Variation means which of the following?
a
Traits that are passed on will ultimately become common within the population
b
All species will produce more offspring than will survive to adulthood
c
There are variations between members of the same species
d
Traits that increase suitability to a species' environment are seen. Some traits are selected for, and some are selected against based on fitness.
Answer: C
Explanation: Generally, variation is the differences between organisms or individuals of the same species caused by either genetic differences or environmental influence. Option C is your closest answer
Whats the Answer? to this
Thanks
I believe it is A (dont trust me)
what are cofactors to enzymes
Answer:
Some enzymes require the addition of another non-protein molecule to function as an enzyme. These are known as cofactors, and without these enzymes remain within the inactive.
Explanation:
^^
Which resource is a renewable resource?
coal
gemstones
metal
trees
Answer:
Trees
Explanation:
I say this because you are able to replant trees, making them renewable.
Trees are classified into the category of renewable resources. Thus, the correct option is D.
What is a Renewable resource?A renewable resource may be defined as an energy source that cannot be depleted and are able to supply a continuous source of clean energy.
Coal, gemstones, and metals are classified into the category of non-renewable resources because they can be depleted and do not available for longer times. They are utilized as time passes.
Therefore, the correct option for this question is D.
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FROM THE LUNGS, BLOOD COMES BACK TO THE HEART. DESCRIBE THE PATH THIS BLOOD FOLLOWS UNTIL IT ENTERS THE AORTA.
Answer:
Tricuspid valve is the path of blood through the heart and lungs
Explanation:
Blood is also responsible for transiting the blood and nutrients. The blood reached right atrium and from here it reached the right ventricles with the help of tricuspid valve. When the ventricles are full it closes to stop blood from going back to the atrium.
The inferior and the superior vena cava let the blood enter through them. The heart left the blood with the help of pulmonary valve to the pulmonary artery and the blood reached the lungs.
Why anaerobic respiration is rapid than aerobic respiration
Answer:
The amount of pressure that is released.
Explanations:
Aerobic respiration is known as a major advantage, base of the amount of energy it releases. Aerobic respiration releases more energy than anaerobic respiration, causing it to become more rapid.
Answer:
Anaerobic respiration is a shorter process than aerobic respiration so a complete cycle of anaerobic respiration is shorter than one of aerobic respiration.
Explanation:
Aerobic respiration involves three stages: glycolysis (the breakdown of glucose into pyruvate), the Krebs cycle (the breakdown of pyruvate into carbon dioxide and hydrogen), and the electron transport chain (hydrogen produced in the Krebs cycle bonding to oxygen to form water).
On the other hand, anaerobic respiration has fewer stages. Anaerobic means 'without oxygen', and so the process takes place without needing any oxygen. In anaerobic respiration, glucose is broken down into pyruvate, just like in aerobic respiration, however due to the lack of oxygen, that pyruvate is broken down into either lactic acid (e.g. in humans), or ethanol (e.g. in yeast). This process is called fermentation, and it doesn't take as long as the Krebs cycle and the electron transport chain, so that's why anaerobic respiration is more rapid than aerobic respiration.
1
Select the correct answer from each drop-down menu.
Small frogs living in a marshy region feed on small insects in the region. The relationship between the frogs and insects is a
relationship. A particular species of lizards is introduced into the marshy land. These lizards also start feeding on
these insects. The introduction of lizards may lead to
Reset
Next
*
r
Options are not provided in the question. The complete question is as follows:
Select the correct answer from each drop-down menu.
Small frogs living in a marshy region feed on small insects in the region. The relationship between the frogs and insects is a _____ relationship. A particular species of lizards is introduced into the marshy land. These lizards also start feeding on these insects. The introduction of lizards may lead to ____________ .
1. a) commensal-host
b) parasite-host
c) prey-predator
2. a) competition between lizards and frogs for food
b) an increase in the number of frogs
c) no population change in any of the three species
Answer:
1. c) prey-predator
2. a) competition between lizards and frogs for food
Explanation:
1. Frogs feeding on small insects in the region shows prey-predator relationship. Predators are the dominating organism which kill weak organism for food and preys are the organisms which are killed. Here, frogs are the predators and small insects act as prey.
2. Introduction of lizards in the same region will increase the competition between lizards and frogs as their food is same that is small insects. Both frogs and lizards have same source of food (small insects), so lizard and frogs will fight for the same food.
Hence, the correct answers are 1. c) prey-predator
2. a) competition between lizards and frogs for food .
Answer:
The relationship between the frogs and insects is a
prey-predator relationship. A particular species of lizards is introduced into the marshy land. These lizards also start feeding on these insects. The introduction of lizards may lead to competition between lizards and frogs for food
.
Explanation:
Need help with ASAP! My diploma depends on it.
what are the steps of enzyme activity?
What types of substances are considered drugs?
Answer:
stimulants (e.g. cocaine)
depressants (e.g. alcohol)
opium-related painkillers (e.g. heroin)
hallucinogens (e.g. LSD)
2- What are the primary sources of ionizing radiation ? Give examples of each
Answer:
Ionizing radiation comes from these main sources:
Nuclear reactions in the Earth's sun and stars in space.
Radioactive decay in the body's tissues and in the soil.
Radioactive decay of unstable elements in rocks, especially rocks that contain radium and release radon gas.
Other examples of ionizing radiation include alpha, beta, and gamma rays from radioactive decay.
"This leaf is 4 inches long."
What kind of observation is this?
A Quantitative
B. Qualitative
C Hypothetical
D. Inferential
Which statement about the light-independent reactions in photosynthesis is true?
Answer:
D) The Calvin Cycle
Explanation:
Calvin cycle refers to the set of chemical reactions taking place in the stroma of the chloroplast in which carbon is fixed into food (glucose). It takes place in light-independent reaction of the the photosynthesis.
Answer:
The answer to this question D.) They comprise the Calvin cycle.
Explanation:
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