BIOLOGY HIGH SCHOOL

A researcher uses several procedures to separate a rock sample into different chemicals. A mass of 50 grams of one chemical is produced. If this chemical cannot be separated into other chemicals, then it is BEST described as Select one:
a. a compound.
b. a mixture.
c. a solution.
d. an element.

Answers

Answer 1
Answer: If a chemical can no longer be separated into other chemicals, it can be said that it is d. an element. This is because elements are the purest substances out there. Rocks are mixtures that are made of inerts and various minerals which are compounds. Compounds are then composed of elements. 

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Which of the following organisms would you expect to have the largest surface-area-to-volume ratio? Assume that all of the following are the same total length. _____ Select one: a. a rotifer b. a mollusk c. an annelid d. an arthropod e. a platyhelminth

Answers

The organism that should be expected to have the largest surface-area-to-volume ratio is option  e. a platyhelminth.

What is a platyhelminth?

It contained soft bodies. it should be considered as the bilateralsymmetrical. It should be free-living in nature. Also, it consist the marinespecies and the other should live in the freshwater. The anterior part of the body should possess the mouth. Here the organ should be situated along with the size of the body.

hence, option e is correct.

learn more about an area here: brainly.com/question/24818544

Answer:

The preferable option will be - E.

E. A platyhelminth has the largest surface-area-to-volume ratio.

Explanation:

Platyhelminth  :

  1. They have soft bodies.
  2. Their body is bilaterally symmetrical.
  3. They are free-living.
  4. Some of them are marine species and others live in freshwater or moist transitional environments.
  5. At the anterior part of their body, possesses their mouth.
  6.  Their organ is situated along their body size.
  7.  They are divided into four classes such as : Turbellaria, Monogenea, Trematoda, and Cestoda.
  8. E.g, flatworm, tapeworm, monogenea, flukes etc.

       

Review the numbered items below. Then, decide which of the following lists the correct steps of translation in the correct chronological order. I. UGA codon is identified.
II. DNA is unwound to expose a single template strand.
III. tRNA molecules carrying various amino acids bond to mRNA based on the sequence of mRNA codons.
IV. mRNA arrives at the ribosome
V. Introns are snipped out of an mRNA molecule.
V. tRNA, carrying methionine amino acid, bind to mRNA.

Answers

Answer:

IV, VI, III, I

Explanation:

Translation is the process of synthesis of protein from with the help of messenger RNA (mRNA).

The process of translation include initiation, elongation and termination.

  • Initiation: In this step mRNA binds to ribososomes and tRNA, carrying start codon or methionine binds to mRNA.
  • Elongation:In this step, the tRNA molecules carrying several amino acid bind to mRNA based on the sequence of mRNA codon and then moves (translocates) to the next mRNA codon which leads to amino acid chain.
  • Termination: At the end, when a stop codon (UGA) identified, polypeptide is released.

So, the correct chronological order is IV, VI, III, I.

You can identify or classify archaea and eubacteria by _____.

Answers

For this item, we are to identify the certain classification to which the organisms, archae and eubacteria belong. The answer to this item is that both are examples of prokaryotic cells. Prokaryotic cells differ from eukaryotic cells in that it does not have some of the organelles present in the eukaryotic cells.
You can identify or classify Archaea and Eubacteria by cell wall composition. The main difference between Archaea and Eubacteria is in the composition of the cell wall. Archaea have the cell wall made up of uncommon lipids. Eubacteria have the cell wall made up of peptidoglycan.

How can the carbon stored in plants reach the atmosphere?Evaporation
Diffusion
Photosynthesis
Cellular Respiration

Answers

Carbon stored in plants reaches the atmosphere via cellular respiration. Cellular respiration is the set of metabolic reactions that allows plants to convert the energy from nutrients into ATP (adenosine triphosphate) and then release the waste products. The energy from the glucose molecules is broken down into ATP. Water and carbon dioxide are also required to convert the nutrients into ATP. In our case, carbon and oxygen are waste products so they are released into the atmosphere via the pores underneath the leaf of a plant or tree. 

Carbon stored in plants reaches the atmosphere through the process called cellular respiration.

What is cellular respiration?

Cellular respiration in Plant can be defined as a set of metabolic activities that enables plants to transform energy from nutrients into ATP (adenosine triphosphate) with the use of CO2 and H2O to release waste products such as carbon and oxygen.

  • This process is achieved by the energy gotten from glucose molecules which are converted into adenosine triphosphate (ATP).

Carbon and oxygen are waste products and are discharged into the environment through the pores underneath the leaf of a plant.

Learn more about cellular respiration here:

brainly.com/question/12827458

These are two metamorphic rocks. Which statement about the rocks is accurate? The rock on the right is foliated. The rock on the left formed from granite. The rock on the left is formed from cooled magma. The rock on the right has randomly arranged grains.

Answers

Answer:

The rock on the right is foliated

Explanation:

There are three types of rocks. Metamorphic, igneus and sedimentary.

Igneus rocks are formed from magma that cooled in one point of earth history, so non of the metamorphic rocks is formed from cooled magma.

Sedimentary rocks are formed from varios sediments or grains that after processes of pression or temperature compact together. So, metamorphic rocks are not formed from randomly arranged grains

Metamorphic rocks are rocks that change their shape for a phisical reason. One common way to find metamorphic rocks is foliated, this means that the rock has layers. Like a book, with different sheets.

When a metamorphic rock is formed from granite, the pattern is foliated, with layers and the form of the rock is usually banded, this rock is called Gneiss. The left image is not layered.

The right image is layered like sheets, this is the only option that has no counter arguments

Can someone help me An organism's energy, nutrient and survival requirements are aspects of its: habitat population ecosystem niche

Answers

Can someone help me An organism's energy, nutrient and survival requirements are aspects of its niche. Niche is a term used to refer to an organism's ability to adapt and respond to its environmental conditions. This includes its behavior to the availability of food & water, presence of predators, reproduction, and survival.
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