URGENT!!
Need help with this biology question please help
Answer:
i think it's a hexose because it's similar.
Mature red blood cells expel their nuclei so that they have more surface area to transport oxygen and
carbon dioxide. What does this demonstrate?
O A. They cannot live very long.
о
B. They must die within 24 hours.
OC. They are beginning to show signs of cancer.
o
D. They are unable to metabolize or produce ATP.
Answer:
The fact that mature red blood cells expel their nuclei, to expand their surface area and transport oxygen, can demonstrate that they cannot live very long.
Explanation:
The absence of a nucleus in mature red blood cells (erythrocytes) means that it has no genetic material and is unable to synthesize proteins to repair itself. This means a relatively short half-life for these cells.
A mature red blood cell circulates in the blood and performs its function for about 90 to 120 days, after which it is eliminated.
Regarding the other options:
B. Red blood cells can live more than 24 hours.
C. The absence of a nucleus in erythrocytes does not indicate any relationship with cancer.
D. Although they do not have mitochondria, erythrocytes can obtain ATP by glucose glycolysis and lactic acid fermentation. Even so, it is not related to the lack of nucleus
Question 6
Which of the following statements most accurately describes the difference between an ionic bond and a covalent bond?
O Atoms held together by ionic bonds separate when placed in water, while atoms held together by covalent bonds do not separate in water.
Electrons are exchanged between atoms held together by an ionic bond, but they are shared between atoms held together by a covalent bond.
O lonic bonds hold together atoms of two different types, while covalent bonds hold together atoms of the same type.
O lonic bonds form between atoms that carry opposite charges, while covalent bonds form between uncharged atoms.
Answer:
Answer is lonic bonds hold together atoms of two different types, while covalent bonds hold together atoms of the same type.
lonic bonds hold together atoms of two different types, while covalent bonds hold together atoms of the same type. So, the correct option is (C).
What are Ionic and Covalent bonds?There are two forms of bonding in which an atom can participate which are as follows:
Covalent bondIonic bondCovalent bond is defined as involving the sharing of electrons between two or more atoms while ionic bond is defined as the formation when two or more ions come together and are held together by charge difference.
Ionic bonds form with atoms with a greater electronegativity difference, for example NaCl whereas covalent bonds form with the electronegativity of the combining atoms not much different from the bond formed between them, for example HCl
Thus, lonic bonds hold together atoms of two different types, while covalent bonds hold together atoms of the same type. So, the correct option is (C).
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Which two systems are the kidney, bladder, colon, stomach, and small intestines associated with?
Explanation:
(idk why i can't comment under ur answer in my post) but yess i do like them, can i have your snap? bc it's easier to talk there
define and explain the issue of sustainable farming
A deciduous tree
a. has green leaves year-round
b. is cone-bearing
C. sheds its leaves in the winter
d. is also called a conifer
Answer:
I think it is C.
Explanation:
Answer:
C is your answer a deciduous tree sheds its leaves in the winter
HELPPPPPPPP PLEASE IM ON A THIN TIME HERE
Answer:
I think ,conservation of natural resources
Explanation:
Some consumers, like lions, do not eat plants or any other producers. They only eat other animals.
How do lions obtain the carbon they need?
Answer: by eating meat from animals...?
Explanation: Well lions do actually eat meat so whenever they eat meat I'm guessing they get whatever they need. I'm still learning so sorry if I am wrong.
Answer:
by eating animals that have carbon-based molecules stored in their bodies
Explanation:
HELP PLZZZ. I DONT UNDERSTAND ANY OF THIS
Answer:
The second option
using the following term in a scientifically accurate complete sentence: sugar
Plant breaths through the stomata that is located on the underside of the leaf.
O True
O False
Please help me with this question!!!!
Answer:
A
Explanation:
how does the nucleus works with the lysosomes
Answer:
Lysosome, subcellular organelle that is found in nearly all types of eukaryotic cells (cells with a clearly defined nucleus) and that is responsible for the digestion of macromolecules, old cell parts, and microorganisms.
Explanation:
Hope this helps!
The nucleus houses the cell's DNA and directs the synthesis of proteins and ribosomes. Mitochondria are responsible for ATP production; the endoplasmic reticulum modifies proteins and synthesizes lipids; and the golgi apparatus is where the sorting of lipids and proteins takes place.
Which statement best describes the relationship between activation energy and rate of reaction?
Increasing the activation energy can increase the rate of a reaction.
O Reducing the activation energy can increase the rate of a reaction.
O Increasing the reaction energy does not alter the rate of reaction.
O Reducing the activation energy can decrease the rate of a reaction.
A) Reducing the activation energy can increase the rate of reaction.
Hope this helps :)
Describe hydrolysis and dehydration synthesis reactions in regards to macromolecules
and water
Answer:
Explanation:
In dehydration synthesis reactions, a water molecule is formed as a result of generating a covalent bond between two monomeric components in a larger polymer. In hydrolysis reactions, a water molecule is consumed as a result of breaking the covalent bond holding together two components of a polymer.
are centrioles affected by viruses
Answer: Yes they are affected. By targeting the centrosome, some viruses hijack its functions, leading eventually either to cell death or to cell transformation.
Explanation:
Which phrase refers to the repeating pattern of a mineral's particles? solid structure O crystal structure organic structure O inorganic structure
A crystal is a solid that is created when a mineral's particle pattern repeats itself, the solid features sharp edges and corners where its flat sides meet.
What is the structure of minerals?Some elements can be found in nature in their pure state, not combined with other elements. Minerals also include substances like copper, silver, and gold.
Additionally, minerals have a distinct chemical makeup with an ordered atomic arrangement known as a crystalline structure.
Chemical composition, crystal structure, and physical characteristics. quartz, feldspar, mica, amphibole, olivine, and calcite are examples of common minerals.
Therefore, a mineral is an inorganic element or compound that occurs in nature having a crystal structure.
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A desert that contains plants and animals that have been there for a long time is an example of
a population started with a total number of 100 individuals. Over the following year, population data were collected. Calculate birth rates,death rates,net migration rate, and rate of population change for the data below.
Answer:
a. Birth rate: 14%
b. Net migration rate: 2%
c. Death rate: 20%
d. Rate of population change: -4%
e. Declining
Explanation:
I'm assuming this question is from the Biozone textbook, and this is the original data:
Births: 14
Deaths: 20
Net migration: +2
And the way to calculate the rate of population change is by adding together the birth rate and net migration rate, and subtract the death rate. If there was one you'd have to subtract the net emigration rate as well :)
What does an inhibitor do ?
Answer:
Enzyme inhibitors are molecules or compounds that bind to enzymes and result in a decrease in their activity. An inhibitor can bind to an enzyme and stop a substrate from entering the enzyme's active site and/or prevent the enzyme from catalyzing a chemical reaction. There are two categories of inhibitors.
Explanation:
I had to look this up lol. hope it helps tho!
what is the smallest classification group after order
Answer:
Genus
Explanation:
Answer:
Linnaeus' hierarchical system of classification includes seven levels called taxa. They are, from largest to smallest, Kingdom, Phylum, Class, Order, Family, Genus, Species.
Explanation:
hopefully that helps you
What is mitosis? ( Use a minimum of 5 sentences. )
Answer:
Mitosis is a neccessary process that helps the creation of life. The purpose of it is to make cells to regrow and replace old, dead, and/or wornout cells. What happens during mitosis is that a single cell will duplicate each and every one of its contents. This includes chromosones and more. It will then split into two identical daughter cells. This is how it makes it's newer cells.
A polar molecule is one which
Answer:
Explanation:
A polar molecule has a net dipole as a result of the opposing charges (i.e. having partial positive and partial negative charges) from polar bonds arranged asymmetrically. Water (H2O) is an example of a polar molecule since it has a slight positive charge on one side and a slight negative charge on the other.
The material found inside the cell membrane
but outside the nucleus is called?
Answer: cytoplasm
Explanation:
When a plant is entering the Calvin cycle of photosynthesis______.
Answer:
use light energy to make ATP and NADPH
Explanation:
NEED HELP DUE TODAY PLZ HELP ME I AM STUCK PLZ PLZ PLZ HELP ME!!!!
Which structure represents a ribosome?
Choose 1 answer:
(Choice A)
A
Structure A
(Choice B)
B
Structure B
(Choice C)
C
Structure C
(Choice D)
D
Structure D
Answer:
Its D.....
I hope it helped you!!
Answer:
structure D that I am sure of
Explain why all the water on earth is the same water that was on earth 12,000 years ago when the last Ice Age ended.
Answer:
Because if the water cycle
Explanation:
They water cycle just is a cycle that reuses the water over and over again. Although the water light come from somewhere else in the world it is still the same water
The water cycle is simply a cycle that reuses water over and over. As this water cycle helps to circulate water throughout the environment.
What is water cycle?The water cycle is a biogeochemical cycle that describes the continuous movement of water on, above, and below the Earth's surface. It is also known as the hydrologic cycle or the hydrological cycle.
Evaporation, condensation, and precipitation are the three major processes in the water cycle.
Evaporation is the process by which the surface of a liquid changes to a gas. Liquid water (in the ocean, lakes, or rivers) evaporates and turns into water vapor during the water cycle.
The hydrologic cycle is critical because it determines how water reaches plants, animals, and humans.
Addition to offering water for people, animals, and plants, it also shuttles nutrients, pathogenic organisms, and silt into and out of marine ecosystems.
Thus, it can be concluded that the water on the Earth is same as it was on earth 12,000 years ago when the last Ice Age ended.
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True/False: Eukaryotic cells are ONLY single celled.
Answer:
false they can be multicelled
Explanation:
What changes can occur in an aquatic ecosystem as a result of nutrient loading?
Answer:
Changes in natural flow regimes as a result of water extraction and supply direct modification or destruction of important habitat barriers to the movement of the plants and animals.
Explanation:
Answer: D Improved water habitats for human recreation
Explanation: D Improved water habitats for human recreation
trust me bro.
what is the importance of variables is an experiment?
