When the huge polar caps on mars form every winter, they are made chiefly of ________?
Drag the terms to complete the concept map below. diploid organisms maternal chromosomes meiosis ii sister chromatids separate crossing over occurs haploid gametes
The phases of diploid and haploid multicellular plants alternate between generations in their life cycle.
Thus, The chromosomes are copies in diploid and haploid organisms. The plant's spores are unicellular, and when they begin to divide through the process of mitosis, they form identical cells.
These haploid cells are all identical. Each parent's set of chromosomes is present in equal numbers at haploid stages. The gametophytes are multicellular systems made up of these similar cells.
The haploid multicellular stage of a plant's life cycle is known as a gametophyte. Gametes are produced by the gametophyte. The sexual fertilization process is carried out by these gametes.
Thus, The phases of diploid and haploid multicellular plants alternate between generations in their life cycle.
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On a hike along the desert slope of the sierra nevada mountains in california, you notice that there is an abundance of pinyon pine and juniper trees. we would identify these two plants as:
Through which means are healthcare workers in the US most frequently exposed to blood or bodily fluids? A. Exposure of broken or abraded skin B. Skin injuries with contaminated sharp instruments such as needles and scalpels C. Human bites D. Contact with mucous membranes of the eyes, nose, or mouth
Cells on the shaded side of a plant stem elongate more than cells on the lighted side because __________. ethylene inhibits the cells on the lighted side from becoming more flexible auxins accumulate on the shaded side and cause the shaded side's cells to become more flexible ethylene stimulates cell growth on the shaded side and causes the cells to become more flexible auxins accumulate on the lighted side and cause the lighted side's cells to become less flexible
When did Lamarck publish his ideas on evolution?
A) late 1700s
B) early 1700s
C) early 1800s
D) late 1800s
Any factor in an experiment that affects the results of the experiment is
Diets extremely low in fat may be deficient in ________.
âwhat is the term for chronic and degenerative liver disease that causes injury to the hepatocytes
The answer is cirrhosis. Cirrhosis builds up when scar tissue changes normal, healthy tissue in your liver. It happens after the healthy cells are damaged over a long period of time. This is a late stage of scarring (fibrosis) of the liver caused by many forms of liver diseases and conditions, such as hepatitis and chronic alcoholism. The liver performs a few essential roles, like cleaning your blood, detoxifying harmful substances in your body, and making vital nutrients.
The formation of the fertilization envelope (slow-block to polyspermy) requires an increase in the availability of _____.
The _______ is the ultimate cause for balancing a population.
Answer:
The age structure, breeding pattern and environment are the ultimate causes for balancing a population.
Explanation:
When it comes to balancing a population, the main causes are all kinds of demographic components. The equilibrium of a population is directly linked to the reproducibility of the individuals involved. Based on this, we can say that the age structure and reproductive pattern of individuals are very important demographic components for population balance. In addition, these components are directly linked to the conditions that the environment provides to individuals.
Which memory system has an unlimited capacity and can keep information for hours or decades?
Memory system has an unlimited capacity and can keep information for hours or decades is called long term memory. Long term memory is defined as a system in which information can be stored permanently, manage and retrieve for later use. Long term memory is divided into three main parts; these are procedural, sematic and episodic memory. Procedural memory is accountable for knowing how to do things, though it doesn’t now include conscious thoughts. While, sematic memory is responsible for the general knowledge that includes knowing about the word’s meaning. Lastly, the episodic memory in which it involves conscious thoughts thus it is responsible for storing information about the various happenings in human life.
Long-term memory is the memory system with unlimited capacity, capable of storing information for hours, years, or even decades. It's similar to a computer's storage system and goes through encoding, storage, and retrieval processes. Memory enters sensory memory first, then short-term memory, before finally being stored in long-term memory with enough rehearsal.
Explanation:The memory system that has an unlimited capacity and can keep information for hours or even decades is the long-term memory (LTM). LTM can be compared to a computer's storage system, serving as a place where information is permanently or semi-permanently stored. Memory has three basic functions: encoding, storing, and retrieving information.
The process of getting information into our memory system is called encoding. Storage is the retention of the encoded information, and retrieval is the act of getting information out of storage and into conscious awareness through recall, recognition, and relearning. Sensory, short-term, and long-term memory are the three distinct stages information must pass through for it to enter storage. This tripartite division of human memory and its comparison to a computer's processing system is laid out in Atkinson and Shiffrin's model of memory.
Information first enters our sensory memory for a period of less than a second to a few seconds. The information we pay attention to is then transferred into short-term memory. With regular rehearsal of this information, it moves into long-term memory for permanent storage. Overall, long-term memory has a practically limitless storage capacity and is divided into implicit and explicit memory.
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Jane is performing in experiment on plant growth she places it in direct sunlight waters it at the same time every day and always gives the plants the same amount of water what is the independent variable? The amount of water, time, the amount of sunlight, or plant growth
Any condition or factor that can be manipulated, controlled, or measured, is a _____
When food enters the small intestine, a hormone stimulates the release of ______ from the pancreas?
________ development involves growth and changes in the body and brain, the senses, motor skills, and health and wellness.
Physical development involves the growth and changes in the body and brain, senses, motor skills, and health and wellness. Examples include improving coordination through exercise or the development of a child's senses as they grow.
Explanation:The development described in your question is known as Physical Development. This type of development pertains to the changes and growth that occur in a person's body and brain, encompassing motor skills, sensory abilities, and aspects of health and wellness. An example of physical development could be an individual improving their coordination through regular exercise, resulting in enhanced motor skills. Another example could be a child's senses developing as they grow, enabling them to see, hear, taste, smell, and touch more effectively.
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Which of the following best describes sperm production in the male human reproductive system?
A.One diploid cell, with 46 chromosomes, undergoes meiosis to form four haploid sperm cells, with 23 chromosomes each.
B. Four haploid cells, with 23 chromosomes each, undergo mitosis to form one haploid sperm cell, with 23 chromosomes.
C. One diploid cell, with 46 chromosomes, undergoes mitosis to form four diploid sperm cells, with 46 chromosomes each.
D.Four haploid cells, with 23 chromosomes each, undergo meiosis to form one diploid sperm cell, with 46 chromosomes.
Answer:
A.One diploid cell, with 46 chromosomes, undergoes meiosis to form four haploid sperm cells, with 23 chromosomes each.
Explanation:
The diploid primary spermatocytes (2n=46) undergo meiosis I and forms two haploid secondary spermatocytes (n=23). The secondary spermatocytes undergo meiosis II and form total four sperm cells (n=23). Since the sperm cells are product of meiosis, they are haploid and each sperm cell have 23 chromosomes.
What are the basic differences between milk cream and butter?
Cream has a lower fat content while butter has a higher fat content and undergoes additional processing steps.
Milk Cream vs. Butter:
Cream: Contains a fat content ranging between 10% and 18%, often sold as half and half, coffee cream, or table cream.Butter: Made from sweet creams with a fat content of 30% to 40%, undergoes a process where fat separates from buttermilk, gets washed and kneaded for consistency, with added color and salt.Differences: Cream has a lower fat content compared to butter, which has a higher fat content and undergoes additional processing steps.The amount of light entering the eye is regulated by changes in the size of the
Based on the classification of organisms, a lion would share characteristics most similar to an animal in the same ______.
Final answer:
A lion would share the most similar characteristics with an animal in the same genus, such as other large cats within the genus Panthera like tigers, leopards, and jaguars.
Explanation:
Based on the classification of organisms, a lion would share characteristics most similar to an animal in the same genus. The classification system scientists use, known as the taxonomic classification system established by Carl Linnaeus, organizes living things into hierarchical categories. As you move down these categories from the kingdom to the species level, the organisms become more similar to each other due to shared traits and a closer evolutionary relationship.
Lions, for instance, belong to the genus Panthera, which they share with other large cats like tigers, leopards, and jaguars, which means they are closely related. At the family level, lions are part of the Felidae family, which encompasses all cat-like carnivores, including domestic cats. However, domestic cats belong to a different genus, Felis, indicating that while they share many characteristics and a common evolutionary path, they are less closely related than lions are to other members of the Panthera genus.
Which best describes a benefit of using DNA technology in medicine?
A hospitalized 10-year-old child is apathetic about eating. what is the best nursing intervention to support the child's nutrition?
Hiv, the virus that causes aids, was discovered in the early 1980s. because it is a relatively new virus, there are many myths and misunderstandings that surround this virus. false true
Answer:
true
Explanation:
_____ systems have a membrane that separates the internal chemicals from the external chemical environment.
___________ is defined as the process used to render a surface or product free from viable organisms, including bacterial spores.
Why is positive feedback helpful in blood clotting but unsuitable for the regulation of body temperature?
Final answer:
In summary, positive feedback loops are employed in blood clotting to quickly escalate the response until clot formation is complete, which is necessary for stopping bleeding. On the other hand, negative feedback loops are essential for body temperature regulation, as they help maintain constant conditions by counteracting changes away from the body's set point.
Explanation:
Blood Clotting and Body Temperature Regulation
Blood clotting is a process maintained by a positive feedback loop, where the presence of clotting factors leads to the amplification of the clotting response, and thus more clotting factors are produced. This reaction continues until the clot is formed, which is necessary to stop bleeding. Positive feedback loops are beneficial here as they lead to the rapid escalation of the body's response until the endpoint - a stable clot - is reached.
However, body temperature regulation requires a negative feedback mechanism. When the core body temperature strays from the set point, homeostatic responses such as sweating or shivering are triggered to bring it back to normal. As opposed to the positive feedback loop, this negative loop ensures a stable body temperature by making adjustments that counteract the initial change, rather than amplifying it.
Given that positive feedback loops may push the system away from the set point and can be potentially harmful if not properly concluded, they are unsuitable for continuous processes like body temperature regulation that require constant fine-tuning to maintain stability.
What structures in amoeba and paramecium also occur in plant cells?
Amoeba and paramecium share basic eukaryotic structures with plant cells, but plant cells have a large central vacuole, cell wall, and plastids like chloroplasts that these protozoans do not.
The structures in an amoeba and paramecium that also occur in plant cells include a cell membrane, cytoplasm, and sometimes vacuoles, which are common components of eukaryotic cells. However, plant cells have several unique structures not found in these protozoans, such as a large central vacuole, a cell wall, and plastids like chloroplasts. The large central vacuole in plant cells maintains pressure against the cell wall, giving shape and support to the cell, the cell wall provides structure, support, and protection, and plastids such as chloroplasts are involved in photosynthesis and can store pigments.
He organ that produces bile salts that break down fats is the ____.
In the liver, bile salts are formed. Because of their low surface tension, this contributes to the emulsification of fats found in the intestine and their absorption from the GI tract. These are bile’s components. It is because of the bile salts which give bile the ability to emulsify, mix, lipid in the aqueous environment in the intestine. Bile is the one responsible for the efficient digestion of lipids. Bile is secreted in the gallbladder down to the small intestine. It then breaks dietary fats into smaller particles called emulsification in the small intestine. The bile’s function is in the completeness of the digestion and absorption of fat.
The australopithecus lineage went extinct about:
Which element is not found in abundance in the atmosphere?
A. Carbon
B. Nitrogen
C. Phosphorous
Phosphorus is the element not found in abundance in the atmosphere, unlike carbon and nitrogen, which are part of the carbon cycle and naturally occur in the atmospheric gases.
Explanation:The element phosphorus is not found in abundance in the atmosphere. Unlike carbon, which is part of the carbon cycle and can be found in the atmosphere as carbon dioxide, phosphorus does not have a gaseous phase under normal conditions on Earth. The phosphorus cycle is mainly based on the movement through the lithosphere, hydrosphere, and biosphere, rather than the atmosphere. Phosphorus is essential for life as it is a critical component of bones, teeth, and cellular structures, yet it is relatively rare in the Earth's crust and not readily available in the environment like carbon or nitrogen.