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yaroslaw [1]
3 years ago
9

Is Sirius B brighter or dimmer than the sun ?

Biology
2 answers:
gtnhenbr [62]3 years ago
8 0
Normally, the only objects that outshine Sirius in our heavens are the sun, moon, Venus, Jupiter, Mars and Mercury (and usually Sirius outshines the latter two!).
Lorico [155]3 years ago
5 0
Sirius B is brighter than the sun.
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Why is the "dorsal-ventral" axis not synonymous with the "posterior-anterior" axis in the whole human nervous system?
Nutka1998 [239]

Answer:

The ventral side is towards the belly side

The Dorsal side is back to the belly side

Anterior is Before the belly side

Posterior is after or coming after to the belly side.

Explanation:

The ventral side is associated with the animal or a person belly side which related to the organism digestion and respiratory organs.

The anterior is the before or in front of side position which is associated with the front line of an organism.

The posterior side is related to the after side or it is opposite to the anterior position of an organism.

It is depend on the organism position, that these sides are related to each other in some instances. In some cases these are orthogonal in some times.

5 0
4 years ago
Describe why biodiversity increased with the introduction of sea otters in California over the last fifty years
Leya [2.2K]

Sea otters affected biodiversity because they control the populations of sea urchins, which endanger kelp forests. Kelp forests are important because they convert sunlight to living material, and they also provide food and habitat to sea creatures. Kelp is important in sustaining the diversity of ecosystems. Additionally, sea otters may also be accountable for the large size of abalones in California.

4 0
3 years ago
Read 2 more answers
Select all that apply
pashok25 [27]
Are located in a specific place on a chromosome
7 0
3 years ago
Pollen and Ovules are gametes. How many chromosomes would they have compared to the rest of the plant's body cells? What process
Svetlanka [38]

Answer:

a. They would have half chromosomes as much as the plants body cells.

b. Meiosis

Explanation:

Gametes are sex cells produced only in sexually reproducing organisms. In plants as stated in this question, male gametes are contained in pollens while female gametes are contained in ovules. The process by which these gametes are made is called MEIOSIS.

Meiosis is a cell division that reduces the chromosomal number of the parent cell by half. This means that each GAMETE will contain half the number of chromosomes as the parent cell. Fir example, if the body cell of a plant contains 30 chromosomes, each gamete formed via Meiosis in that plant will have 15 chromosomes.

In a nutshell, pollen and ovules, which are gametes of plants formed by MEIOSIS would have half chromosomes as much as the plants body cells.

4 0
3 years ago
Investigate substances containing carbon or oxygen that relate to biological processes. Explain their main function in those pro
Scorpion4ik [409]

Answer:

Well, you already have the answer, but I can try to elaborate XD

So, DNA: contains genetic information that is necessary for biological functioning and reproduction.

More specifically, it contains the genetic instructions through gene encoding that instructs the cell what to do. A specialized complex ribosome interacts with the DNA molecules and "reads" it, changing the genes from the DNA into proteins that the cell as a whole can function upon. It is also crucial to forming a whole cell in offspring, since only the genes from the two parents combined (in humans at least) can produce an offspring with all genes intact. Those who do not have genetic disorders, a famous one being Down Syndrome.

Next, RNA: a molecule necessary for expressing genes and making proteins.

Connecting to the paragraph above for DNA, RNA also assists in the process by reading the ribosome that reads the DNA itself. Complicated, I know. All you have to know, however, is that the RNA, in this case called mRNA since it serves as a messenger, hence, the "m", reads the codons produced by the ribosome when it reads the DNA, and makes proteins according to those codons, and those proteins then scatter all across the cell to execute instructions.

Now, we move onto nitrogen and phosphorous: both are found in amino acids, the building blocks of proteins.

That is actually partially wrong. Amino acids do not contain phosphorous, but do contain nitrogen. Not exactly sure what went wrong on your end there, but nitrogen is a basic building block for amino acids, which are basic building blocks themselves for proteins. To be more clear, amino acids are made of carbon, hydrogen, oxygen and nitrogen atoms. No phosphorus there!

Finally, enzymes: special proteins that accelerate chemical reactions in cells.

This is correct. Enzymes typically lower the activation energy required for reactions to happen. More specifically, enzymes make the reaction molecules more active, hence, lowering the threshold for the amount of energy you have to put in before the molecules start crashing into each other hard enough to have a chemical reaction. Of course, enzymes do not participate in the reaction itself, which makes them incredibly useful for spurring on chemical reactions since they can be used multiple times.

Yes i know the answer is long

ididnt know how big or small you wanted it

so......yea

hope it helps

7 0
3 years ago
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