Which of these examples demonstrates homeostasis? A.
A bird flies south for the winter and flies back north in the spring.

B.
An amoeba takes in food and digests it.

C.
A cat runs away when it hears a noise.

D.
A person's body increases blood flow to its cold feet.

Answers

Answer 1

Answer: A persons body increases blood flow to its cold feet. hope it helped you. Please mark as the brainliest if it helped.

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What is true about the relationship of adenine and thymine?- Adenine and thymine are a base pair

- Adenine and thymine are antiparallel

- Adenine and thymine form a covalent bond

- Adenine and thymine are phosphates

Answers

DNA stands for deoxyribonucleicacid. The deoxy- in the DNA is a short term for deoxyribose. The nucleic acidmolecule has three parts; sugar, phosphate and a base. The phosphate in the DNAacts as a backbone of the molecule. It is also responsible for the DNA’s‘double-helix’ structure. The base has four codes namely adenine, thymine,cytosine and guanine. Adenine and thymine are bse pairs whereas cytosine andguanine are base pairs. They are not to be interchanged. Resulting in one causemutation in the gene.

The relationship between adenine and thymine is that they are base pairs.

Further Explanation:

The nucleic acid makes the DNA. The nucleic acid is made up of nucleotides. Each nucleotide is made up of a phosphate group, deoxyribose, and a nitrogenous base. DNA has mainly four different types of a nitrogenous base.

Adenine
Cytosine
Thymine
Guanine

RNA also contains guanine, adenine, and cytosine but they do not contain thymine They contain uracil instead of thymine. Chargaff’s rule said that the amount of thymine is the same as the amount of adenine. Also, the amount of guanine is equal to cytosine. The adenine base is paired with thymine in DNA but in RNA adenine pairs with the uracil. The guanine base is paired with the cytosine.

DNA undergoes a replication process wherein duplication of the double-helical structure takes place. It then moves further and forms an RNA molecule through a process called transcription. RNA undergoes RNA processing followed by post-transcriptional modifications which further release out mRNA, rRNA, and tRNA molecules. All the three kinds of RNA enter into the last phase of central dogma called translation. During this, proteins are formed.

Learn more:

Learn more about mitosis brainly.com/question/6462270
Learn more about the menstrual cycle brainly.com/question/723944
Learn more about meiosis brainly.com/question/94813

Answer Details:

Grade: High School

Subject: Molecular Biology

Chapter: Gene expression

Keywords:

DNA, RNA, concept map, replication, double helical, nucleotides, transcription, proteins, translation, mRNA, rRNA, tRNA, cytosine, adenine, uracil, thymine.

Which type of organism is at the lowest level of the food chain?omnivore

carnivore

autotroph

heterotroph

Answers

heterotroph type of organism is at the lowest level of the food chain. Thus, the correct option is D.

What is heterotroph?

A heterotroph is defined as an organism which eats other plants or animals for energy and nutrients.

Heterotrophs positioned at the second and third levels in a food chain from the lowest, a sequence of organisms which provide energy and nutrients for other organisms. Each food chain comprised of three trophic levels, that describe an role of organism in an ecosystem.

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Answer:

heterotroph

Explanation:

A heterotroph is an organism that cannot fix carbon and uses organic carbon for growth. Heterotrophs can be further divided based on how they obtain energy; if the heterotroph uses light for energy, then it is considered a photoheterotroph, while if the heterotroph uses chemical energy, it is considered a chemoheterotroph.

What can happen if an organism's population gets too big?

Answers

Greetings!

There are many bad consequences that may occur if a population becomes to large/over-sized.

Here are a few examples:

~Shorter Supply of food and water.

~Limited Shelter

~More predation

These are only a few things that may happen.

Rarely, however, do we see a population get to big for its environment. Normally, nature seems to balance itself out. Even us, humans, have not become to many for the Earth we live on.

However, if over-population were to occur, then there are licensed hunters that may be put in charge, to take care of the situation.

If an organisms population gets too big and exceeds the carrying capacity, a lot of consequences may happen, such as fighting for food, resources, but eventually some must die off.

If the population is over the carrying capacity, resources such as land, food, or water must be limited and organisms must fight for it in order to survive. And who wins? The ones that have a favorable characteristic. They survive while others die. When the number of organisms that die exceeds the number that is born, this is the death phase in a population. Death phase is very common if the initial population gets too big.

PLEASE CHECK MY ANSWER!!!!!!What is the result at the end of meiosis II?

A.
two haploid cells

B.
four haploid cells

C.
two diploid cells

D.
four diploid cells

I think it's B.

Answers

The answer is B. four haploid cells. In the meiosis, the number of chromosomes is reduced by half. It consists of meiosis I and II. In meiosis I, 2 haploid cells are formed from a diploid mother cell. These 2 haploid cells undergo meiosis II which is similar to mitosis. As the result of meiosis II, 2 haploid cells form from each haploid mother cell. Therefore, as the result of meiosis, 4 haploid cells are formed.

Which organisms are responsible for absorbing carbon from the atmosphere

Answers

plant life is responsible for absorbing carbon from the atmosphere

Final answer:

Autotrophs, including land plants and marine autotrophs, are responsible for absorbing carbon from the atmosphere through photosynthesis.

Explanation:

The organisms responsible for absorbing carbon from the atmosphere are autotrophs, specifically land plants and marine autotrophs.

Land plants obtain carbon dioxide directly from the atmosphere, while marine autotrophs acquire it in the dissolved form (carbonic acid, HCO3-).

These organisms use carbon dioxide to build multi-carbon compounds, such as glucose, through the process of photosynthesis. In the process, they also release oxygen, contributing to approximately 21 percent of the oxygen content of the atmosphere.

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In the United States there are many types of rabbits. four different species have four different ranges or habitats. in which range would developing white fur in winter most likely not be an advantage?