BIOLOGY MIDDLE SCHOOL

What makes ribosomal RNA useful as a molecular clock? -A large portion of the DNA ring is not vital to structure or function, allowing it to accumulate neutral mutations.

-Its rate of mutation increases over time as organisms continue to evolve and differentiate from each other.

-A slow mutation rate makes it useful for determining evolutionary relationships between ancient species.

-It is only found in select organisms, making it easier to compare relationships between species that have it.

Answers

Answer 1
Answer:

Answer:

-A slow mutation rate makes it useful for determining evolutionary relationships between ancient species.

Explanation:

rRNA is present in every organism and over the period of time, mutation occurs in DNA strand due to pol III.


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HIGH SCHOOL

What is the momentum of a 2000 kg truck that moves at 10 m/s?

Answers

Answer:

20,000 kgm/s.

Explanation:

The product of mass and velocity is known as momentum


Momentum = mass*velocity

= m*v

= (2000 kg) * (10 m/s)

= 20,000 kgm/s.

To calculate momentum one would obtain it according to the following formula

P = m • v
P = (2000 kg) • (10 m/s)
P = 20,000 kgm/s.
HIGH SCHOOL

Consider an organism that is eukaryotic, found in both unicellular and multicellular forms, may resemble a plant but is not photosynthetic, has chitin in its cell walls, and absorbs organic nutrients from decomposing material in the environment. This organism would be classified as which of the following types of organisms?A. fungiB. protozoaC. bacteriaD. archaea

Answers

I believe it is C, Bacteria
HIGH SCHOOL

What does the word kyotos as in cytoplamsa mean

Answers

A city on S Honshu, in central Japan: the capital of Japan a.d. 
City in Japan, from kyo + to, both meaning "capital." Founded 794 as Heionkyo "Capital of Calm and Peace," it also has been known as Miyako and Saikyo. Kyoto Protocol so called because it was initially adopted Dec. 11, 1997, in the Japanese city.
HIGH SCHOOL

What occurs during a decomposition reaction? The components of several molecules recombine to form new molecules. A compound partitions into its components. New compounds are formed by chemical bonding

Answers

During a decomposition reaction, a compund partitions into it's components. This is a type of a chemical reaction where a larger/more complex compund is broken down into simpler elements or compounds which were initially combined in a chemical reaction.This type of reaction often requires an energy source such as heat or light to break down the compound.

Answer:

A compound partitions into its components.

HIGH SCHOOL

Sometimes odorants can stimulate the somatosensory system through polymodal nociceptors. these sensations are mediated by the ________, which transmits information about the "feel" of an odorant.

Answers

Odorants can stimulate somatosensory system through polymodal nociceptors (touch, pain, temperature receptors), these sensations are mediated by the trigeminal nerve (cranial nerve), which transmits information about the feel of an odorant. Often, it is impossible to distinguish between sensations traveling up cranial nerve I from olfactory receptors and those traveling up cranial nerve V from somatosensory receptors e.g. peppermint, cool, Amonia, burning, etc.
MIDDLE SCHOOL

This is the cultivation of animals, plants, fungi, and other life forms for food, fiber, biofuel, drugs and other products used to sustain and enhance human life.

Answers

Answer:

the answer is Agriculture

Explanation:

i got it right on the vocab quiz

HIGH SCHOOL

Red hair may have evolved in the neanderthals and then was introduced into human populations via interbreeding. if this is true this would be an example of

Answers

Gene flow

If this is true, this would be an example of gene flow.

Gene flow is the movement of genetic materials or organisms from one population to another, thereby influencing the composition of the set of genes of the affected population. Gene flow usually occurs among humans through the relocation of human populations either willingly or not.



HIGH SCHOOL

A seed breaks out of dormancy and begins to _____ when its environmental conditions are good (e.g., sufficient water is provided).

Answers

Germination takes place when the conditions become favorable for a dormant seed. These conditions include availability of water, nutrition, sunlight as well as temperature. Dormancy prevent germiation in unfavorable conditions. Hard seed coats, impermeability, and immature embryo may also cause dormancy.
HIGH SCHOOL

What's happens to biomass as you move up the biomass pyramid

Answers

Answer;

The biomass and energy decreases as you move up the biomass pyramid.

Explanation;
  • Biomass is the mass of material in living organism. It is usually measured as dry mass of biological material in grams. A biomass of organisms at different levels of a food chain can be shown in a pyramid of biomass.
  • The biomass of in each trophic level is always less than the trophic level below because not all organisms at one stage are eaten by the same stage above. Some material and energy is passed out as waste by the organism. Some of the energy is used for growth.
  • Therefore, biomass and energy decreases as you move up the biomass pyramid from one trophic level to the next.
The amount of energy decreases. the top of the pyramid always has the least amount of energy and the bottom of the pyramid has the most amount of energy. 
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