The cells of _____ and _____ have modified mitochondria. the cells of _____ and _____ have modified mitochondria. dinoflagellates ... metazoans diplomonads …parabasalids euglenozoans ... alveolates chlorophytes ... ciliates fungi ... stramenopiles

A gene is a section of DNA that encodes instructions for creating a specific protein or RNA molecule, effectively determining a particular trait in an organism.

A gene is a locus (or region) of DNA that encodes a functional RNA or protein product, and is considered the molecular unit of heredity. The transmission of genes to an organism's offspring is the basis of the inheritance of phenotypic traits. In simpler terms, genes carry instructions for making all the proteins that are required for an organism's growth, development, and biological functions, thus determining specific traits.

A gene is a discrete sequence of DNA nucleotides. Often, one gene is responsible for making one protein, but this is not always the case. The expression of genes can be influenced by environmental factors, and some proteins may be the result of multiple genes working together.

An example of how a gene works is seen in pea plants, where a specific gene might code for flower color. Therefore, to answer the student's original question, the correct option is:

D) a section of DNA that codes for a specific trait

Evolutionary biologists theorize that the first living organisms on earth are single-celled prokaryotes. The two prokaryotic domains are archaea and bacteria. Bacteria varies from disease-causing pathogens to valuable photo synthesizers and symbionts while archaea are diverse, but not pathogenic and they have the characteristics to live in extreme environments. Moreover, the presence of prokaryotes is highly dominating for they can be found everywhere even inside our bodies but they are difficult to count, classify or detect.

Prokaryotes, which are straight, single-celled microorganisms, were the first life forms on Earth.

These species first appeared during the Archean Eon, which lasted approximately 3.5 to 4 billion years. Prokaryotes differed from later-evolving, more complex eukaryotic organisms in that they lacked a defined nucleus and membrane-bound organelles. Bacteria and Archaea were the two primary categories of early prokaryotes.

These organisms were perfectly adapted to Earth's harsh early conditions, which included high temperatures, lack of oxygen, and much volcanic activity. They were essential in molding the planet's ecosystems and creating the conditions for modern existence. As these primitive organisms evolved over time, more complex life forms emerged.

Learn more about Prokaryotes here:

https://brainly.com/question/29054000

#SPJ6

Answer:

i think its 2, 4,5

Explanation:

Answer:

Option D, Natural Process

Explanation:

The following happens in all the below given processes -  

a) Photosynthesis – In photosynthesis, CO2 taken by plant react with water in presence of sunlight  to produce glucose and oxygen. No carbonate is formed in this process.

b) Chemical process – Chemical process are not necessarily natural process and since Jesse wants to know process of conversion of CO2 to carbonate in atmosphere, therefore this should be a natural process.  

c) Litterfall – it is related to falling of dead leaves from plant and has no relevance with carbonate formation.

d) Natural process – Natural processes helps the formation of carbonate from CO2 present in atmosphere

A series of chemical reactions are involved  

Step 1 – Carbon in atmosphere is dissolved by rain/water to form carbonic acid  

CO2 + H2O -> H2CO3 (carbonic acid)

Step 2 – Carbonic acid causes weathering of rock thereby producing bi carbonate ions

H2CO3 + H2O + silicate minerals -> HCO3- + Mineral cations + clays

Step 3  Carbonate is precipitated from bicarbonate ions

Mineral  + 2HCO3- -> MineralCO3 + CO2 + H2O

Thus, Option D is correct.

The conscious perception of vision probably reflects activity in the occipital lobe of the cortex, which is the primary area of the brain responsible for visual interpretation.

The conscious perception of vision likely reflects activity in the occipital lobe of the cortex. The occipital lobe in our brain is primarily responsible for interpreting visual information sent from our eyes. The process starts when light enters our eyes and hits the retina. The information is then transferred by the optic nerve through the thalamus to the occipital lobe, where it is consciously perceived as vision.

https://brainly.com/question/8216106

#SPJ5

Answer:

First of all, he should eat only up to 1500 mg of sodium per day.

Secondly, he should have 6 to 8 servings of grains per day. Ideally, he should only consume whole grains as these do not spike insulin levels as refined grains do.

Third, he should consume 4 or 5 vegetables or fruits per day, in order to get all the essential vitamins and minerals.

He should also avoid fried foods, and only consumme lean meat, poultry and fish.

Calcium is the chemical element of atomic number 20, with a Ca.sup. Symbol of molar mass of 40 g / mol.

It is a hard gray-white, alkaline-earth metal that is never found in pure bodies in nature. It is the fifth most abundant element of the earth's crust (more than 3%) and is essential for organic matter: formation of bones, teeth and shells. Calcium also plays a very important role in cell physiology.

To calculate the number of moles of calcium, you have to apply the law of:

Number of moles = mass / molar mass.

n = m / M = 0.06 / 40 = 1.5 × 10 -3 mol = 1.5 mmol.

The number of moles of calcium is 1.5 milli-moles.

Answer: The deep-sea organisms found today have undergone evolution in the past and are very complex now because their body structure also varies from that of the organisms that are present at a lower depth.

The bodies of these organism does not contain any air cavities in which the pressure could exert. It is because of this, the organism are quite solid without any air in their bodies, thereby they can withstand extreme high pressure.

The likely characteristics of an ecosystem that has remain unchanged are :

An ecosystem is interactive geographical area consisting of both biotic such as plants and animals  and abiotic factors such as water and weather conditions interacting together to maintain life in the area.

An ecosystem that has remained unchanged for hundreds of years will most likely possess well developed soils, old trees and a stable climatic condition.

Hence we can conclude that The likely characteristics of an ecosystem that has remain unchanged are :Well developed soils , Old Growth Trees and Relatively stable climate.

Learn more about ecosystem : https://brainly.com/question/15971107

In the F2 generation, 75 percent of rabbits are expected to have floppy ears, and 25 percent are expected to have black fur.

When crossing two true-breeding groups of rabbits, one with floppy ears and white coat and the other with straight ears and black coat, to obtain an F1 generation that all have floppy ears and grey coat, we can infer certain genetic principles.

Given that both traits are determined by a single gene and undergo independent assortment, according to Mendelian genetics, in the F2 generation we expect to see a 3:1 phenotypic ratio for each trait.

For ear type, since all F1 rabbits have floppy ears, we would conclude that floppy ears are dominant. Hence, 75 percent of the F2 generation rabbits are expected to have floppy ears. For coat color, grey in the F1 suggests incomplete dominance between white and black alleles. However, the question specifically asks for the percentage of F2 rabbits with black fur, which would be the result of homozygous black allele mating. Therefore, expectedly, 25 percent of F2 rabbits would exhibit a black coat color due to the recessive nature of black fur in the context provided.

The answer is the cerebrum!! Plz mark brainliest

The cerebrum is the largest part of the brain and is composed of right and left hemispheres. It performs higher functions like interpreting touch, vision and hearing, as well as speech, reasoning, emotions, learning, and fine control of movement. The cerebellum is located under the cerebrum.

Final answer:

Thymocytes are lymphocytes that develop immunocompetence in the thymus through a series of developmental stages. They are formed in the bone marrow and then migrate to the thymus to develop their T cell receptors. Thymocytes differentiate into different types of T cells, such as helper T cells and cytotoxic T cells.

Explanation:

The lymphocytes that develop immunocompetence in the thymus are called thymocytes. Immature T-cells, or thymocytes, enter the thymus and go through a series of developmental stages that ensures both function and tolerance before they leave and become functional components of the adaptive immune response.

Thymocytes are formed in the bone marrow and then migrate to the thymus, where they develop their T cell receptors. This process of maturation in the thymus is critical for the development of a functional immune system.

Once mature, these thymocytes differentiate into different types of T cells, such as helper T cells (CD4+T cells) and cytotoxic T cells (CD8+T cells), which play crucial roles in the immune response.

The answer is respiration. Paenibacillus wynnii is a facultative bacteria found in soil and other environments. Being facultative, it can survive in both oxygenated or anoxic environments. Therefore, if put together with Cyanobacteria that produces oxygen, Paenibacillus wynnii will use the oxygen in respiration.

The oxygen produced by cyanobacteria is used by Paenibacillus wynnii in respiration. The Latin name paene means almost, which reflects its name “almost bacilli”.  This endospore-forming bacteria, specifically genus P. larvae is known to cause American foulbrood in honeybees but they are essential in agriculture and horticulture.

In addition, these bacteria can catalyze a wide variety of synthetic reactions ranging from cosmetics to biofuel production for they produce extracellular enzymes like polysaccharide-degrading enzymes and proteases.

Answer: Plants that are attached to the ocean surface live in the benthic zone. These plants are also found in the epipelagic zone which maxes at 200m. Plants and life need warmth, oxygen, and sunlight. At these depths, all of these are available to ocean life.