In a given strand of dna the number of thymines
A. Is same as the number of uracils
B. Is double the number of guanines
C. Is double the number cytosines
D. Is the same as the number of adenines
Plz answer ASAP
Explain why the steroid hormone estradiol (MW 272) readily crosses membranes by simple diffusion but the much smaller H requires transport proteins
Answer:
Estradiol has a higher partition coefficient than H+ ions
Explanation
Estradiol is a non-polar and hydrophobic molecule that has a higher partition coefficient than H+ ions, it means that the cell membrane is more permeable to this molecule because it can dissolve in and diffuse within the hydrophobic phase of the membrane. The movement of polar charged molecules (even small H+ ions) requires the input of energy to be able to dissolve within the lipid bilayer. In consequence, the movement of H+ ions requires proteins capable of transporting these protons through the membrane.
Which examples of artificial selection are caused by human activity without people even realizing it?
a. an increase of tuskless Asian elephants because of ivory poaching
b. growing human organs from pig stem cells because of increased research on stem cell therapy
c. a decrease in rams’ horn size because of hunters’ preference for long-horned rams
d. cows producing milk with more protein because of genetic engineering
e. chickens producing more meat because of selctive breeding
an increase of tuskless Asian elephants because of ivory poaching, a decrease in rams’ horn size because of hunters’ preference for long-horned rams
Answer:
a,an increase of tuskless Asian elephants because of ivory poaching,
c,a decrease in rams’ horn size because of hunters’ preference for long-horned rams
Explanation:
Lesson 5 Student Activity Sheets: How do bacteria grow?
PREDICTION:
1. If you could zoom in really close to see what was happening on a petri dish, what do you think you
would see?
Answer:I need some points,, I hope y’all can understand
Explanation:
The growth of bacteria can be observed as the bacteria grows very rapidly and fast by the process of asexual reproduction. They continuously multiplied and in very short period of time they divided from one to thousands.
What is asexual reproduction?Asexual reproduction is defined as the process of reproduction in which only a single parent is involved. Reproduction has been defined as the process carried out by the living organisms and during the process of reproduction the living organisms produces their own young ones and feed them. Reproduction is the supreme quality of living things.
There are two types of reproduction and these are sexual and asexual reproduction. The process of reproduction in which two parents are involved is said to be sexual mode of reproduction and the process of reproduction in which only single parent is involved in known as asexual mode of reproduction. The example of asexual reproduction are budding, fragmentation, spore formation, and binary fission.
Therefore, The growth of bacteria can be observed as the bacteria grows very rapidly and fast by the process of asexual reproduction. They continuously multiplied and in very short period of time they divided from one to thousands.
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Picture yourself around a campfire. Which of these would be an example
of convection?
A metal rod would not be a good choice for roasting marshmallows because metal transfers
thermal energy.
O As the air around the campfire is heated and becomes less dense, it rises and
moves upward.
A metal rod would not be a good choice for roasting marshmallows because
metal transfers thermal energy.
Answer:
O As the air around the campfire is heated and becomes less dense, it rises and moves upward.
Explanation:
This is true because, the convection transfer needs the particle of elements to transport the heat from where it is in abundance to where it is in less abundance. Just like a water boiling becoming hot at the point closer to the fire than the top of the pot, so also will the air around campfire transfer heated air from the place closer to the campfire to upwards aware from the fire.
Convection is the flow of air around the campfire when it is heated and the decrease in density as it rises upward in the atmosphere. Thus, the correct option is C.
What is convection of heat?Convection is the transfer of heat from one place to the other due to the movement of fluids present in it. It is a distinct method of heat transfer in systems. The convective heat transfer involves combined processes of conduction and advection in a system and its surrounding. Convection is the dominant form of heat transfer in liquids and gases.
The thermal radiation in the fire is mostly in the form of infrared waves and visible light. However, the campfire heat transferred via convection shoots straight up in the sky and never reaches to the ground level.
Therefore, the correct option is C.
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Chlorophyll:
A)gives plants a brown color
B)is used by plants to make food
C)is soaked up from the soil by root hairs
Answer:
b: chloroplasts are used in photosynthesis
Explanation:
not a: cause chlorophyll makes plants green not brown
not c: cause its used in photosynthesis
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Various cultures designate racial categories differently, and they often base these categories on very different traits. For example, some cultures use nose shape as one of the defining traits for a racial group. Other cultures do not use nose shape in defining racial groups, but use hair color instead. Conduct a survey in person on your campus, via social media accounts online, or among your friends and family. Ask at least 20 people what five traits they think are most important when distinguishing racial groups. Document the responses, and then review the data. Did every person use the same traits? What do differences in racial classification such as these suggest about the universality of race and racial groupings?
Answer:
In the clarification portion below, the definition of the topic is mentioned.
Explanation:
This shows that the distinctions between people living in a culture or geographical region are often based on ethnicity including ethnic groupings. A single population belonging to a specific geographical region has been shown to possess many characteristics, including hair color, body potential for heat resistance, and menu variety. In something like a specific race or ethnic group, these social traits bring them alongside, and the young government associated with a particular race is often obligated to answer the custom practiced by individuals related to such a particular demographic. These are assumed that understand the connection to a specific community follow these rituals only to solve difficulties they have previously faced due to errors perpetrated by certain ancestors.help me please :( punnett squares
Answer:
17. A 100% purple
18. D 75% purple 25% white
19. D 100%
20. B If the trait is recessive, then it's B, because she fell into that 25% of recessive trait for blue eyes.
Explanation:
What are the dimensions of the human skeleton?
Answer
Human skeleton, the internal skeleton that serves as a framework for the body. This framework consists of many individual bones and cartilages. There also are bands of fibrous connective tissue—the ligaments and the tendons—in intimate relationship with the parts of the skeleton. This article is concerned primarily with the gross structure and the function of the skeleton of the normal human adult.
,
What is a pathway for an atom (carbon)
Answer:
-- --
)____(
Explanation:
The carbon atom can make a transition between photosynthesis and respiration because the carbon atom is both a reactant and a product. For example, plants take in carbon dioxide for photosynthesis which releases oxygen. Then other organisms use this oxygen for respiration, which releases carbon dioxide.n:
Lactic acid and alcohol fermentation occur when _______?
Question 4 options:
cell death occurs
when no oxygen is present
a cell is subjected to too much oxygen
when the amount of glucose is not sufficient
Answer:
a cell is subjected to too much oxygen
Why are carbon important to these molecules
Answer:
Hiya! ^^
Explanation:
Carbon's molecular structure allows it to form bonds with many elements, itself other carbon elements. Because of this, it can form long chain molecules, each having different properties. Carbon remains in balance with other chemical reactions in the atmosphere and water because of its stability.
Hope this helps! <3
Which of the following is TRUE about the fossil record? Group of answer choices It is sadly incomplete and lacking in all transitional forms. It gives useful information about environments and the ways past organisms lived. Only animals with hard skeletons are preserved. It is best in deep forests where dead organisms have not been disturbed.
Answer:
It gives useful information about environments and the ways past organisms lived
Explanation:
A fossil is basically any preserved remains or trace of any organism that once lived in the past. Bones, shells and exoskeletons are examples of fossils that can be studied through Paleontology.
From fossil studies, we can tell how long these lives existed on earth and how varying plants and animals are related to one another. We can often find out how and the places they lived and their environments as well.
two products of the krebs cycle are
Answer: The correct answer is NADH and FADH2.
Plz mark brainliest:)
Two products of the Krebs cycle are NADH and FADH2.
What is the Kreb's Cycle?The Krebs cycle is a form of chemical reaction that is meant to convert the energy stored in the body in the form of acetyl CoA to other constituents.
Some products of the Krebs Cycle also known as the Citric acid cycle are Nicotinamide adenine dinucleotide and Flavin adenine dinucleotide. The energy released is from carbohydrates and fat.
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how does Asexual reproduction happen
Answer:
The reproduction of organisms without the need for sexual intercourse.
Explanation:
Which of the following are depressions or opening that allows for the passage blood vessels and nerves.
A. Forman
B.fossa
Answer:
Foramen - A hole through which nerves and blood vessels pass
I believe this is the answer not a hundred percent though.
Why does photosynthesis occur at the upper surface of the leaf than the lower surface
Answer: The sunlight hits the upper surface of the leaf, and sunlight is crucial to the photosynthesis process. The leaves trap the energy and use it to create glucose.
Which correctly lists the three main ocean zones?
O deep, neritic, surface
O intertidal, deep, surface
O neritic, intertidal, open ocean
O open ocean, deep, continental
Answer:
Honestly I think it's C
Explanation:
The three main ocean zones are neritic, bathyal, and abyssal. Therefore, none of the statements are correct.
What are the three main zones?The ocean is divided into three main zones which are the neritic zone. This zone is the shallowest zone extending from the shoreline to the edge of the continental shelf and is 200 meters deep.
The bathyal zone is the middle zone extending from the edge of the continental shelf to the abyssal plain and is 4,000 meters deep. The abyssal zone is the deepest zone extending from the abyssal plain to the ocean floor.
Apart from the three main ocean zones, there other oceanic zones are epipelagic zone, mesopelagic zone, and hadal zone. The hadal zone is the deepest oceanic zone and is unique to highly adapted species of marine life and is important to study.
Therefore, the three main ocean zones are neritic, bathyal, and abyssal.
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What makes bottleneck dolphins such “ingenious fishermen”?
What characteristic properly describes glycogen?
Answer: What are the characteristics of glycogen?
It has a structure similar to amylopectin (a component of starch), but is more extensively branched and compact than starch. Both are white powders in their dry state. Glycogen is found in the form of granules in the cytosol/cytoplasm in many cell types, and plays an important role in the glucose cycle.
Explanation:
Damage to the nerve cells without myelin sneath is perment because regeneration of nerve cells can only happen when
Answer:
Damage to the nerve cells without myelin sneath is permenent because the regeneration of nerve cells can only happen when schwann is present!
Hope this helps please give me brainliest!
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Justify your answer.Your cousin tells you that trees have leaves to protect the tree from sun damage, just like a natural umbrella. Do you agree? Justify your answer.
Answer:
no
Explanation:
trees need sunlight to grow the leaves that is on the tree
How are humans affected by population growth of other organisms in anarea?
Answer:
yes
Explanation:
other organisms include things such as plants, insects and animals which can play a large role in the population. For example, if you have a sudden rise in the population of misquitoes that can be really bad since they can spread diseases to people when they are sucking blood. Antoher example is if there is a sudden growth of animals that eats a certain crop, then farmers will stuggle to maintain their crops and the list goes on. Hope this helps :)
Compare transitional aquatic ecosystems. Identify two types in the organizer below and describe the environments each type combines. 9th grade Biology
Answer:
The correct answer is -
wetlands - land and water
estuaries - freshwater and salt water
Explanation:
There are three types of aquatic ecosystems that are lentic, lotic, and wetlands. Lentic ecosystems include slow-moving or non-moving water systems like pools, lakes, or ponds. The Lotic system on the other hand is aquatic systems with faster-moving water systems like the ocean or river also known as estuaries.
Wetlands are the system that has unique properties of having vegetation adapted according to the condition or situations on the water in saturated soil flood with water seasonally or permanent.
Aquatic system organizers
wetlands - land and water
estuaries - freshwater and salt water
Why is Earth called "the living planet?"
Answer:
Because earth is the only living planet which has environment, animals, plants and etc. Other planets don't have any oxygen. Earth has lands, water, oceans greenery.
Hope this helps you!
Explanation:
For the number 8 where would the decimal be if there was a decimal
Fermentation is an example of which of the following pathways?
Answer:
Anaerobic respiration
Explanation:
penn
Explain how wildfires help restore soil nutrients to forest ecosystems.
Answer:
Wildfire help restore soil nutrients - Wildfire kills off the soil organisms that consume soil nutrients. Wildfires restore soil nutrients by decreasing the amount of underbrush in forests that contribute to nutrient loss. Wildfires break down organic material faster than decomposition, thus renewing soil nutrients more quickly.
Explanation:
Wildfire help restore soil nutrients by eliminating soil organisms that consume soil nutrients and decomposition of materials that help to renew soil nutrients.
What is soil nutrients?
Soil nutrients are essential ingredients needed by plants for growth, they include nitrogen (N), phosphorus (P) and potassium (K).
Some factor can impact on soil nutrients thereby reducing it.
How wildfire help to restore soil nutrientsWildfire help restore soil nutrients in the following ways;
Decomposition of materials that renew lost soil nutrientsElimination of soil organisms that consume soil nutrients. Reduction of plants that contribute to nutrient loss.Learn more about soil nutrients here: https://brainly.com/question/8901446
Why do molecules move across the membrane?
Answer:
because they help your brain produce the lack of energy it could be getting
Explanation:
In the figure, X is pointing to a building block of DNA. Which of these correctly labels X?
A. Amino acid
B. Nucleotide
C. Polysaccharide
D. Pyrimidine
Answer:
Nucleotide
Explanation:
I took the test and it was right.
The name of the building block of DNA that is depicted by X in the attached image is nucleotides.
DNA:
DNA or deoxyribonucleic acid is a biological molecule that stores genetic information in living cells. DNA molecule is a biological polymer and hence, is made up of monomers called nucleotides. Nucleotide is the subunit of a DNA molecule. Nucleotide is made up of three components namely: nitrogenous bases, phosphate group and pentose sugar. In the image attached to this question, X is used to represent the building block of DNA, hence, it is a nucleotide.Learn more at: https://brainly.com/question/22499464?referrer=searchResults