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3 years ago

Cnidarians have two main body types. which of these pairs of words describes the two common body types of cnidarians?

1 answer:

5 0

The best and most correct answer among the choices provided by the question is the third choice "jellyfish and corals"

Cnidaria is a phylum containing over 10,000 species of animals found exclusively in aquatic environments: they are predominantly marine species. Their distinguishing feature is cnidocytes, specialized cells that they use mainly for capturing prey.

I hope my answer has come to your help. God bless and have a nice day ahead!

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Identical population-splitting events occurred simultaneously on two neighboring islands, Islands B and C, which are each initia

sweet-ann [11.9K]

Answer:

This is due to the event of Speciation that happened for the rodents in Island B but not for the rodents in Island C.

Explanation:

Due to splitting of the population,

The sub-population of rodents formed in Island B are B1 and B2.
The sub-population of rodents formed in Island C are C1 and C2.
In case of Island B, each of the B1 and B2 sub-populations that got split from each other developed certain mutations that were necessary for them to adapt to the particular diverse environment each of them were exposed to, through the period of 50,000 years. These mutations were so varied that reproductive isolation was generated between them that resulted in each of them to develop into different species.Hence, speciation happens here and B1 and B2 are incapable of inter-breeding.
In case of Island C, each of the C1 and C2 sub-populations that got split might have got exposed to similar environmental change or no environmental change or the environmental change might have been too small to cause drastic change in each of the sub-populations. As a result of this the two sub-populations might have acquired certain mutations to adapt to the environment each of them were exposed to, through a period of 100,000 years. These mutations might not have been too variable or contrasting to cause reproductive isolation between C1 and C2. Hence, no new speciation happens here and C1 and C2 are capable of inter-breeding.

4 0

2 years ago

6. Why does meiosis increase genetic variation in the offspring, but mitosis does not? (1 point)

brilliants [131]

Meiosis involves crossing over where chromosomes exchange genetic segments, resulting in different sets of chromosomes. Each time an egg or sperm created, it is different due to this recombination. Mitosis on the other hand is non-sex cells replicating exact copies of themselves which lead to no genetic variation as they aren't involved in producing offspring.

3 0

2 years ago

Explain the criteria for categorizing phenomena as science (Consistent, Observable, Natural, Predictable, Testable, and Tentativ

Vladimir79 [104]

Answer:

Consistency: Consistency is the property of the phenomena where the result of the observation or experiment should be consistence. The degree of the variation between the observation should very low.

Observable: The outcome of the result of the experiment should be observable and the result should be record able.

Natural: For the happening of the event, it should be explainable with the reference of the natural events.

Predictable: The event should be able to predict that can be explained on the basis of the naturally occurring event.

Testable: the cause of the natural event should be able to tested on the basis of variable environment in controlled environment to draw the different result and a conclusion based on the result.

Tentativeness: the scientific theory should be such that it could be tested upon. With the development of science, the theory should be modifiable and even proven wrong.

8 0

3 years ago

Select the correct answer from each drop-down menu. When a liquid is cooled, the kinetic energy of the particles. blank The forc

Tamiku [17]

Answer:

1.) Kinetic energy decreases

2.) The attraction increases

3.) Space between the particles decrease

Explanation:

That's what I think it is.

4 0

2 years ago

If the lacI gene in the genetically engineered fluorescent strain were nonmutant but the lacO sequence on the chromosome mutated

zaharov [31]

Answer:

if the lacI gene, in the genetically engineered fluorescent strain were non-mutant but the lacO sequence on the chromosome is mutated to lacOc then,

in the presence of the inducer, the cells fluorescence will show

yellow; red

in the absence of inducer, the cells fluorescence will show,

yellow; no fluorescence.

Explanation:

when lacO is mutated with lacOc then constitutive mutation happens which lets the system to be on.

7 0

3 years ago