Explanation:
Chromosomal crossover, or crossing over, is the exchange of genetic material during sexual reproduction between two homologous chromosomes' non-sister chromatids that results in recombinant chromosomes. ... Crossing over is described, in theory, by Thomas Hunt Morgan.
Answer:
Chromosomal crossover, or crossing over
is the exchange of genetic information between homologous pairs of chromosomes which accounts for genetic variation.
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What is the name of the most distant manmade object in space?
Sputnik 1
Spirit
Voyager 1
Cassini
Answer:
Voyager 1
Explanation:
At a distance of 152.6 AU (22.8 billion km; 14.2 billion mi) from Earth as of April 24, 2021, it is the most distant man-made object from Earth. The probe's objectives included flybys of Jupiter, Saturn, and Saturn's largest moon, Titan.
Answer:
Voyager 1
Explanation:
Voyager 1 has overtaken all other spacecrafts and is now the most distant: 22 billion km away, pulling away from the slightly slower Voyager 2 at “only” 18.8 billion km distant
different types of cells in the body have different organells depending on their main function. Considering this which type of cells would have the most mitochondria?
A. Red blood cells
B. Bone cells
C. Muscle cells
D. Nerve cells
E. Skin cells
PLEASE HELP!!!! You are a scientist tasked with writing a journal article on the evolution of alligators. In 3–5 sentences, describe the different forms of evidence you might use to analyze the evolution of alligators.
Answer:
The first alligator ancestors evolved about 245 million years ago.
Explanation:
The first alligator ancestors evolved about 245 million years ago due to change in the environmental condition. crocodilians appeared about 80 million years ago during the Cretaceous period. Modern alligators has experience less changes which is closely related to their ancient ancestors and look much like to their relatives that exists about 80 million years ago. The main reason for the change in the body structure of alligator is due to change in environmental condition.
The evolution of alligators can be analyzed by sequencing samples of different species and then producing a bioinformatic analysis.
What is evolution?Evolution means descendence with some class of modification in offspring (phenotypic, genetic, etc).
Evolution can be analyzed by sequencing and comparing the linear order of nucleotide sequences between different species.In conclusion, the evolution of alligators can be analyzed by sequencing samples of different species and then producing a bioinformatic analysis.
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What do all arthropods have?
1: jointed legs
2: 8 legs
3: stiff legs
4: 6 legs
Answer:
every arthropod have jointed legs
Explanation:
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If an organism is 2n=54, how many chromosomes will be in each if it's gametes?
Answer:
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If an organism is having 2n = 54 chromosomes, then the gamete will have 27 chromosomes each.
What are gametes?A gamete is an animal or plant reproductive cell. Female gametes are acknowledged as ova or egg cells in animals, whereas the male gametes are known as sperm.
During cell division, the gamete receives half of the chromosomes of the parent cell due to a process referred to as meiosis.
Thus, if an organism is having 2n = 54 chromosomes, then the gamete will have 27 chromosomes each.
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1.There is a bell at the top of a tower that is 45m high. The bell weighs 190 Kg. The bell has ________
energy.
helppp plzz
Answer:
If you are referring to the potential energy of the bell then the answer would be:
8,379 kg.m²/s² or 8,379 Joules
Explanation:
A large region that has a particular type of climate that effectively influences the types of plants and animals that inhabit each ecosystem is
Answer:
envromet which plants organsims human bigse are living
what drives the flow of water to move from the ocean to the atmosphere?? is it
a. earth's gravity driving the flow of liquid water
b. heat energy
c. light energy
d. matter flowing into the ocean
e. earth's gravity driving the flow of matter and energy
Answer:
b. heat energy
Explanation:
Water, which is able to exist in three different states moves from one form to another. Water can move from the ocean to the atmosphere via a process called EVAPORATION. During the process of evaporation, the sun plays a major role by supplying the HEAT ENERGY required to change water from its liquid form in the ocean to its gaseous form in the atmosphere.
Water cycle of the earth helps ensure that water is not lost in any of its forms. Liquid water stored in the ocean gets evaporated as a result of heat energy into the atmosphere as water vapour.
5. The force applied on a rock is about 800N. The rock does not move. How much work is done on the rock?
Helpp
Answer:
Zero
Explanation:
Work = force x distance moved by the force in its direction
= 800 * 0
= 0
Describe the connection between limiting factors and invasive species
Answer:
Invasive species consume limited resources and become competitor of native species in a given ecosystem
Explanation:
Invasive species are the outsider species introduced in any given ecosystem. These invasive species become a competitor with the native species of that ecosystem for limited resources and hence deplete the limited resources at a faster pace thereby leaving all other species at the risk of dying.
What is oxygen?And how it works?
Answer:
Oxygen is a gas that your body needs to work properly. Your cells need oxygen to make energy. Your lungs absorb oxygen from the air you breathe. The oxygen enters your blood from your lungs and travels to your organs and body tissues
Answer: oxygen is like a gas that helps your body work and breathe. For example your lungs need air and etc. Then chemicals from red blood cells pick up the Oxygen and bring it to the body tissues and cells
What is the function of the small, dark organelles labeled E?
Which is a function of the structure that is represented in the image?
Answer:
They assemble amino acids into proteins.
controls the movement of substances into and out of cells
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What is the site of photosynthesis?
A.leaves
B.stem
C.root
Answer:
Leaves are the major site of photosynthesis
Answer:
Leaves
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Explanation:
by donating a treasured fossil to a specimen collection a scientist is collaborating with other investigators. which of the following best explains why this might be true?
Answer:
Other scientists can see the specimen and of offer suggestions and alternative interpretations.
Explanation:
Which of the following actions would decrease global warming?
Explanation:
Where possible, we can switch to renewable sources of energy (such as solar and wind energy) to power our homes and buildings, thus emitting far less heat-trapping gases into the atmosphere.
Define y desarrolla los siguientes términos en tu libreta (escribe sus variantes)
CÉLULAS
NUTRICIÓN
REPRODUCCIÓN
RESPIRACIÓN
ADAPTACIÓN
Elige un ser vivo y desarrolla sus características comunes con el resto de los seres vivos (formado por células, nutrición, reproducción, respiración, adaptación)
Answer:
- Célula >> unidad básica y funcional de todos los seres vivos
- Nutrición >> proceso de toma de nutrientes del medio ambiente
- Reproducción >> proceso de replicación con el fin de perpetuar la especie
- Respiración >> proceso de intercambio gaseoso en organismos superiores
- Adaptación >> mecanismo por el cual los organismos se ajustan a su ambiente
Explanation:
Un mamífero (por ejemplo, un perro) es un organismo multicelular compuesto por diferentes tipos de células especializadas las cuales se asocian para formar tejidos, que a su vez se asocian para formar órganos y finalmente sistemas de órganos. El sistema respiratorio está compuesto por las vías aéreas y los pulmones. Durante el proceso de respiración se produce el intercambio gaseoso de oxígeno (O2) y dióxido de carbono (CO2) entre los pulmones y la sangre. El oxígeno obtenido mediante la inspiración pasa de los alvéolos pulmonares a la sangre para llegar a cada célula del cuerpo, mientras que en cada expiración se elimina dióxido de carbono en el sentido inverso. La nutrición es el proceso de toma de nutrientes mediante el cual el organismo obtiene energía y materia de su ambiente. Durante este proceso, el sistema digestivo incorpora alimentos que posteriormente son descompuestos en moléculas simples conocidas como nutrientes las cuales son absorbidas para finalmente pasar a la sangre y así llegar a cada célula del cuerpo. La reproducción consiste en el mecanismo mediante el cual una especie se asegura su continuidad a través del tiempo. Los órganos reproductores masculino y femenino están encargados de producir células sexuales, es decir, gametos masculinos (espermatozoides) y gametos femeninos (óvulos) que se unen durante el proceso de fertilización para dar lugar a un cigoto que se desarrollará hasta formar un organismo adulto. Finalmente, la adaptación se refiere al mecanismo por el cual un organismo se ajusta a su ambiente. A nivel de especie, la adaptación es una consecuencia del proceso evolutivo por el cual aquellos organismos que se ajustan mejor a su ambiente tienen más chances de sobrevivir y reproducirse, teniendo por lo tanto más chances de transmitir sus genes a la siguiente generación.
which genetic disorder cause the body to produce unusually thick mucus in the lungs and intestines?
Answer:
Cystic fibrosis (CF) is a genetic (inherited) disease that causes sticky, thick mucus to build up in organs, including the lungs and the digestive system. In people who have CF, thick mucus clogs the airways and makes it difficult to breathe.
How are organelles and cells related?
Answer:
An organelle is a subcellular structure that has one or more specific jobs to perform in the cell, much like an organ does in the body. Among the more important cell organelles are the nuclei, which store genetic information; mitochondria, which produce chemical energy; and ribosomes, which assemble proteins.
Explanation:
organelles membrane bound structure found within a cell......
bound in a double layer of phospholipids to insulate their little compartments within the larger cells just as a celll
what body system does the digestive system work with?
Answer:
The digestive system, the circulatory system, and the muscular system work together and process and obtain nutrients from food. The skeletal system, the endocrine system, and the lymphatic system also work with the digestive system and process those nutrients.
Explanation:
What do you think could be done to minimizes people’s fears about genetic engineering?
Answer:
By comparing the plants and animals we've bred for thousands of years for the perfect amount of food and parts we like. It's possible to create perfect humans, and to make humans immune to disease and genetic disabilities
Explanation:
PLEASE HELP!!
Question 1:Witch one is an example of evidence for evolution?
1: Monkeys to Human
2: Skeletal anatomy
3: Eating habits
Question 2: What is homeostasis?
1: Desire of an entity to remain in a balanced state of resist.change.
2: Desire of a entity to eat food
3: Desire of a entity to adapt to surroundings.
Question 3: Which one of these is NOT an example of natural selection?
1: darker colored mice becoming more prevalent in an area after a volcano flow.
2: Elk having smaller horns attributed to hunting for Elk with larger horns.
3: Squirrels moving into a new area because of a fire
Question 4:True or False - Frogs having webbed fingers and toes is an adaptation.
Answer:s
Q1. Skeletal anatomy
Q2. Desire of an entity to remain in a balanced state of resist.change.
Q3. Elk having smaller horns attributed to hunting for Elk with larger horns.
Q4. True
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Are cows allopatric or sympatric?
Please help
What MOST LIKELY will result in rising global sea levels?
Explanation:
Global warming is causing global mean sea level to rise in two ways. First, glaciers and ice sheets worldwide are melting and adding water to the ocean. Second, the volume of the ocean is expanding as the water warms.
Describe the composition of the mitochondrial membrane and compare that with the composition of a eukaryotic cell membrane. What are the functions of cell membranes
Answer:
Biological energy conversion in mitochondria is carried out by the membrane protein complexes of the respiratory chain and the mitochondrial ATP synthase in the inner membrane cristae. Recent advances in electron cryomicroscopy have made possible new insights into the structural and functional arrangement of these complexes in the membrane, and how they change with age. This review places these advances in the context of what is already known, and discusses the fundamental questions that remain open but can now be approached.
Mitochondria are the powerhouses of the cell. In all eukaryotes that do not depend on photosynthesis, the mitochondria are the main source of adenosine triphosphate (ATP), the energy-rich compound that drives fundamental cell functions. These functions include force generation (for example, in muscle contraction and cell division), the biosynthesis, folding and degradation of proteins, and the generation and maintenance of membrane potentials. ATP is produced on a massive scale in the human body, amounting to 50 kg per day in a healthy adult, but considerably more in a long-distance runner. ATP is generated by the mitochondrial ATP synthase from ADP and phosphate ions. These are the products of ATP hydrolysis at the sites where energy is needed in the cell. Apart from cellular respiration and ATP synthesis, mitochondria have numerous other essential functions, including the production of NADH and GTP in the citric acid cycle, the biosynthesis of amino acids, heme groups and iron-sulfur clusters or the synthesis of phospholipids for membrane biogenesis. They also act in calcium signaling [1], stress responses [2] and generally as cellular signaling hubs [3]. Not surprisingly, mitochondria play a fundamental role in human health. Mitochondrial dysfunction is the cause of severe, often maternally inherited diseases. Moreover, mitochondria are deeply implicated in apoptosis and ageing [4].
In many respects, mitochondria resemble α-proteobacteria, from which they are thought to have originated by endocytosis some 1.6 billion years ago. The most striking evidence of this evolutionary relationship is the close homology of bacterial and mitochondrial respiratory chain complexes. Mitochondria have their own genetic system, which uses a distinct DNA code that differs both from that of their bacterial ancestors and their eukaryotic hosts [5]. They have their own protein translation machinery, complete with ribosomes, tRNAs and associated protein factors that more or less resemble those of their bacterial ancestors. Very recently, the first high-resolution structure of a mitochondrial ribosome, determined by single-particle electron cryomicroscopy (cryo-EM), has revealed a fascinating patchwork of similarities to and differences from bacterial ribosomes [6]. Nevertheless, mitochondria make surprisingly little use of their specialized protein production machinery. In the course of evolution they have transferred up to 99 % of their genes to the nucleus. Today, the vast majority of mitochondrial proteins are produced in the cytoplasm and imported into the organelle by an elaborate set of protein translocases [7]. In humans, only 13 mitochondrial proteins are organelle-encoded, all of them central, hydrophobic subunits of respiratory chain complexes or of the ATP synthase.
Mitochondria are highly dynamic [8]. In the cell, they form a tubular network that constantly changes by division and fusion (Additional file 1). Both processes are accomplished by multi-component molecular machineries that include a number of dynamin-related GTPases [9, 10]. When mitochondria are isolated from cells, the network breaks up into fragments that spontaneously reseal. Isolated mitochondria are fully competent for respiration and ATP synthesis [11]. They maintain their membrane composition, organization and membrane potential, as well as the ability to fuse [12] and to import proteins [7]. We owe much of what we know about mitochondria and how they work at the molecular level to in vitro studies with isolated mitochondria, or even mitochondrial membrane fractions, which still carry out oxidative phosphorylation and ATP synthesis [13].
The composition of mitochondrial membrane consists of several proteins and phospholipids.
The major phospholipids in the mitochondrial membranes are phosphatidylcholine (PC), phosphatidylethanolamine (PE), phosphatidylinositol (PI), phosphatidylserine (PS), and phosphatidic acid (PA), as in cell membrane.Phosphatidylglycerol (PG) and cardiolipin (CL), are exclusively components of mitochondrial membrane.The composition of a eukaryotic cell membrane comprises of phospholipids, proteins, carbohydrates and cholesterol or sterols.
What is a cell membrane ?
The cell membrane is a biological membrane that separates the interior of all cells from the outside environment and protects the cell from its environment.
The eukaryotic cell membrane is a bilayer of phospholipids which is semi-permeable in nature. The mitochondria is a double membranous structure, in which the inner membrane is of crucial importance. It is highly semi-permeable (unlike the outer membrane) and consists of various proteins that are involved in the oxidative phosphorylation.To know more about cell membrane here
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Find the DNA replication for the following code: AAGTCCTCA
Explanation:
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Classify this cell type
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What are the four main descriptions of climate?
Answer:
The characteristics of a planet are that it (a) is in orbit around the sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium [nearly round] shape, and (c) has cleared the neighborhood around its orbit.
Explanation:
UP
Which of the following is not one of the seven primary odors humans recognize?
fresh
putrid
pungent
roses
Answer:
roses
Explanation:
It occurs when an odor binds to a receptor within the nasal cavity, transmitting a signal through the olfactory system.2 Glomeruli aggregate signals from these receptors and transmit them to the olfactory bulb, where the sensory input will start to interact with parts of the brain responsible for smell identification, memory, and emotion.3
There are many different causes for alteration, lack, or disturbance to a normal sense of smell, and can include damage to the nose or smell receptors, or central problems affecting the brain. Some causes include upper respiratory infections, traumatic brain injury, and neurodegenerative disease.
Answer:
Fresh
Explanation:
When you look at the chartr, Roses were cconsidered a floral scent, which was listed, then there was putrid, pungent, and 3 others, the only one that wasn't listed was fresh, because often out scent and taste work together to help us find rotten foods, but we find that by smelling putrid scents or pungent scents, rather than fresh scents. Therefor the correct response is fresh
what is the dominant phase in the life cycle of an angiosperm ?
Answer:
Angiosperms are vascular plants, and all vascular plants have a life cycle in which the sporophyte phase (vegetative body) is the dominant phase and the gametophyte phase remains diminutive.
Explanation:
I hope it's help u
Angiosperms are vascular plants, and all vascular plants have a life cycle in which the sporophyte phase (vegetative body) is the dominant phase and the gametophyte phase remains diminutive.
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