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inessss [21]
3 years ago
15

The lion’s mane jellyfish can be up to 8 feet wide. In spite of its large size, it has no structures for bulk flow to deliver ox

ygen to its cells. How can it be so large, and lack a mechanism for bulk flow? A. The jellyfish is surrounded by water, so the concentration gradient between the water and the jellyfish is steep, making the rate of diffusion across tissues very high. B. The jellyfish is filled with tissue made of structural cells that are not metabolically active. Therefore a mechanism to transport oxygen to its interior is not necessary. C. The jellyfish body is actually a series of intricate folds, so the ratio of surface area to volume is maximized and diffusion occurs as it would across a tissue one or two cells thick. D. The jellyfish does not have receptors for sensing the environment, so does not need a mechanism for transmitting signal molecules throughout the body.
Biology
1 answer:
Tasya [4]3 years ago
5 0

Answer:

The jellyfish is filled with tissue made of structural cells that are not metabolically active. Therefore, a mechanism to transport oxygen to its interior is not necessary.

Explanation:

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frez [133]
1. Two genetically identical copies of DNA

2. Finds an error in DNA, removes the incorrect nucleotide and replaces it with a correct one.

3. It is used as a copy/ "template" for replication in order to have two identical copies of DNA.

4. DNA helicase unwinds DNA double helix and Topiosomerase ensure there isn't too much unwinding.

5. Replication has a built on proofreading system - DNA polymerase removes the incorrect nucleotide and replaces it with a correct one.
5 0
3 years ago
Use this portion of a dichotomous key for tree identification to answer the question. 1a. Needlelike leaf ® Step 10 1b. Broad le
Bond [772]

Answer:

(if these are your choices)

A. They are lobed, simple leaves and are attached staggered on the branch.

B. They are not heart shaped and are attached staggered on the branch.

C. They are compound, broad leaves and are attached oppositely on the branch.

D. They are nonlobed, simple leaves and are attached oppositely on the branch.

the correct answer is D.

Explanation:

7 0
3 years ago
A section of a DNA Molecule that controls the shape of a human thumb is called a(n)______.
DiKsa [7]

Answer:

c

Explanation:

idk

6 0
3 years ago
A person high on the trait of __________ will typically follow a script, or a perceptual and behavioral strategy, that involves
ddd [48]

Answer:

The preferable option will be - C.

agreeableness, agreeable.

Explanation:

  • A person who has an alternative character of <u>agreeableness</u> will typically follow a script, or a cascade of perceptual and behavioral strategy, that involves being warm, friendly, approachable, and slow to anger.
  • If a person is <u>agreeable</u>, then he or she will probably not get angry in response to a mild insult.

So, we can say that an agreeable person is more calmer than an agreeableness person.    

7 0
3 years ago
Damage to a brain area called the _____ would MOST likely interfere with learning a conditioned fear response to the sight of a
ELEN [110]

Answer:

The options

A)hippocampus

B)basal ganglia

C)hypothalamus

D)cerebellum

The CORRECT ANSWER IS D)

D)cerebellum

Explanation:

Apart from the coordinating process, the cerebellum is involved in motor learning, emotional behavior, and fear memory.

Fear learning is widely shown in the variation of autonomic and somatic responses, as in heart rate and freezing, promoted by a neutral stimulus which could have been formally grouped with a painful one.

Variation or changes of the vermis influences these responses, and its reversible inactivation in the period of consolidation which is seen to impair fear memory.

The neural correlate of cerebellar activities in fear consolidation is shown by a behaviorally promoted long-term rise of synaptic effectiveness and efficiencies among parallel fibers and a Purkinje cell.

Likely synaptic variations after fear conditioning are well fully observed in the amygdala and hippocampus, suggesting an interplay among emotional circumstances of scenario and the different variations in neural process.

Furthermore, in hotfoot mice, that shows a basic lack of parallel fiber to Purkinje cell synapse, short- and long-term fear memories are influenced.

All these data gives a foundational background on the concept that the cerebellum is majorly involved in fear learning.

The functional interplay of the vermis with hypothalamus, amygdala, and hippocampus do infer to a more complex activities of the cerebellum as a form of an united network that basically influences emotional behavior.

8 0
3 years ago
Read 2 more answers
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