The correct answer is option B, reading the entire source first, circling key words
Reason -
Scanning through key words is a quick strategy for determining the relevance of a source because its easy to use CTRL+F command and scan the entire document for a key just through few clicks
The index content is also a representation of the summary of the text inside the book. There is high probability that an important key word is marked in the index and thus it is easy and quick to scan an index as the text is less. Similarly, looking in table of content is also a quick process.
But reading the entire book just to find a key word is usually a tedious task.
Dichotomous keys might seem difficult because they require accurate observations and understanding of specific biological vocabulary. However, with practice, usage of dichotomous keys can become easier. It's similar to learning a new language.
Dichotomous keys might seem challenging because they require a high level of attention to detail and understanding of specific biological terminology. However, with practice, they become easier to use. A dichotomous key is a tool used in biology to identify an unknown organism by going through a series of choices that lead the user to the correct name of a given item.
To correctly use a dichotomous key, you must carefully observe the organism in question and make accurate observations. Then, you follow the key, making decisions based on your observations. This often involves detailed, specific biological vocabulary and precise measurements which some students may initially find overwhelming.
However, remember that with practice and usage, becoming proficient with dichotomous keys is completely achievable. It's essentially like learning a new language! Once you get the hang of it, it can be a valuable tool in your biological studies.
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B) contraction of body hair muscles
C) thyroid hormones increase basal metabolic rate of cells in the body
D) blood vessels dilate and blood is directed to the superficial layers of the skin
Blood vessels dilate and blood is directed to the superficial layers of the skins is one way in which the body will react to maintain homeostasis.
Homeostasis is the set of self-regulation phenomena that lead to the maintenance of constancy in the properties and composition of the internal environment.
Control in blood flow is a response that reduces heat transfer and therefore maintains body temperature.
Thermoreceptors upon detecting an increase in body temperature, are activated and transmit this information to the hypothalamus that receives the information.
Blood vessels constrict to reduce the passage of "warm" blood to the skin, allowing it to be used in vital organs.
Blood vessels in the skin dilate as a result of increased body temperature, allowing molecules to separate and occupy more space.
In addition, it increases the amount of warm blood that flows from inside the human body, increasing blood pressure and transmitting heat to the outside environment more quickly.
This allows body temperature to be lowered, a notorious consequence of this dilation of the vessels is the reddening of the skin where there is greater flow and transfer of body heat.
Therefore, we can conclude that blood vessels dilate and blood is directed to the superficial layers of the skins is one way in which the body will react to maintain homeostasis.
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a. cause inflammation
b. make your mucous membranes watery
c. produce antibodies
d. eat dead cells
2) Why do doctors recommend that people get a new flu shot every year?
a. the flu virus becomes immune to the vaccine
b. the vaccine wears out over time
c. your body eliminates the vaccine
d. the flu virus changes every year
3) Antibodies do which of the following?
a. attach to cells with corresponding antigen
b. engulf and destroy pathogens
c. produce antigens
d. produce immature cells that become B cells
I keep getting a D, so if you could kind of explain it to me as well, that will be great.
B cells produce antibodies (option C), whereas doctors recommend that people get a new flu shot every year because the flu virus changes every year (Option D).
Mutation refers to any type of alteration of the genetic material (DNA) in the genome of an organism or virus.
In conclusion, B cells produce antibodies (option C), whereas doctors recommend that people get a new flu shot every year because the flu virus changes every year (Option D).
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B. The law of conservation of energy
C. Dalton's atomic theory
D. The law of conservation of matter
Answer:
The correct answer will be
Marsh grass→ grasshoppers→shrew→marsh hawk.
Explanation:
The food chain is a series of steps of energy transfer in an ecosystem by eating the organism and itself being eaten.
The food chain starts from the autotrophs or producers which can synthesize the food on their own like plants, eaten by primary consumers or herbivores which feeds on autotrophs. The primary consumers itself are eaten by the secondary consumers also known as carnivores and so on. The energy is transferred in the food chain via a 10% energy rule.
The food chain in marsh starts from the Marsh grass which is eaten by the grasshoppers. These grasshoppers are eaten by the shrew which is eaten by the marsh hawk.
Thus, Marsh grass→ grasshoppers→shrew→marsh hawk is the correct answer.