Which set of ecological organization levels is most likely to contain the largest variety of species?

sertanlavr [38]

Saliva has a pH normal range of 6.2-7.6 with 6.7 being the average pH

8 0

3 years ago

Mrs. Gibbs cannot seem to catch up with the eating habits of her 14-year-old daughter Zondra and 16-year-old son Austin. Her wee

Alex787 [66]

Answer: The answer is 2200 calories per day for Zondra and 3000 per day for Austin

Explanation:

The options are;

a. 1800 calories per day for Zondra and 2200 per day for Austin

b. 2200 calories per day for Zondra and 3000 per day for Austin

c. 2400 calories per day for each of them

d. 2000 calories per day for each of them

The answer is option B -2200 calories per day for Zondra and 3000 per day for Austin

Calories provide energy which we use to perform daily activities. The calories derived from food allow us take part in important activities and leisure. Calorie needs are often higher during teenage years because it is the time of rapid growth.

Austin, is her 16 year old son. The recommended calorie needs for adolescent males between the ages of 16- 18 are; 2,400 calories for non active adolescents, 2,800 calories for moderately active adolescents and 3200 calories for active adolescents.

Zondra is a 14 year old female adolescents. The recommended needs for adolescent females between the ages of 14-18 are; 1,800 calories for non active adolescent females, 2,000 calories for moderately active and 2,400 calories for active adolescent females.

Option B, 2200 calories per day for Zondra and 3000 per day for Austin fall within the range

3 0

3 years ago

The energy of motion is called heat energy<br><br> true or false

pav-90 [236]

The energy of motion is called kinetic energy

5 0

3 years ago

Which of the following clades is most likely to survive a series of catastrophic events over time? (1 point)

marishachu [46]

The correct options are as follows:
1. D.
<span>A clade refers to a group of organisms that are made up of evolutionary descendants that originated from a common ancestor. A clade that will survive a series of catastrophic events must be one that is made up of distantly related and diverse species. This is because, those species will have different type of adaptability capacity and will be able to adapt in different ways to the catastrophic events. Due to the differences in their ability to adapt, some of the specie will survive the catastrophic events even if others are wipe out.

2. B.
The mass extinction of one specie usually creates space for another new specie to survive. The new specie that survive the old one may possess the ability to adapt to the event that wipe out the former set of living organisms and thus, the new specie will be able to occupy and reproduce in their new space. Mass extinction is said to occur when the whole population of living organism living in an ecosystem are wipe out as a result of unfavorable conditions.

3. B.
Convergent evolution refers to the independent evolution of similar features in species that arise from different lineages. The species involved usually evolve these traits as a result of having to adapt to similar environments. Convergent evolution usually result in evolution of analogous structures, that is, structures that have similar forms or functions but which are not present in the last common ancestors of the species.

4. C.
In evolution, gradualism refers to theory that states that evolution occurs slowly and gradually, thus, large changes in evolution are actually product of small changes that occur over a long period of time. The theory of gradualism was originally proposed by James Hutton in 1795.

5. C.
Mass extinction refers to the wiping out of a a large number of species within a very short time. Mass extinction can occur as a result of severe unfavorable conditions that all the species in an ecosystem can not adapt to. An instance of this is a drastic decrease in global temperature after several massive volcanic eruptions.</span>

8 0

3 years ago

Enzyme found in retroviruses that produce dna from an rna template. True or False

grandymaker [24]

Answer:

Explanation:

1 .Reverse transcriptase (RT) is an RNA-dependent DNA polymerase enzyme which makes DNA from RNA..

2. RT makes double-stranded DNA molecules from ssRNA ( single stranded RNA) molecule using it as a template.

3. Retroviruses like HIV contain Reverse transcpritase (RT) enzyme, which uses the RNA molecule as template and make DNA from it and after that, virus make multiple copies of itself.

4. Reverse transcriptase enzyme make DNA reverse transcrptionally from RNA the process known as RNA dependent DNA polymerase.

5. It was first discovered in retroviruses.

7 0

3 years ago