Answer:
Trees and plants.
Explanation:
Trees give us oxygen and plants get rid of carbon dioxide and remake it as oxygen.
In the Oxygen molecule O2, stability is gained through sharing of two pairs of electrons with a single neighboring atom.
What is the sharing of electrons?The sharing of electrons gives rise to the formation of covalent bonds between two atoms. Atoms will be covalently bonded in order to gain more stability. During the process of sharing electrons, they are simultaneously attracted by the two atomic nuclei.
The stability of oxygen molecules is gained through the help of non-polar covalent bonds. This means that there is no difference in electronegativity of bonded atoms.
The valence shell of oxygen has six electrons, so they need two more electrons in order to fulfill its octet and maintain stability. The sharing and paring of electrons between two or more atoms construct a bond known as covalent bonds.
Therefore, in the Oxygen molecule O2, stability is gained through sharing of two pairs of electrons with a single neighboring atom.
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Which statement explains how determining the age of the remains of living things is similar to dating rocks
Answer:
it is choice a.............................
Explanation:
on test
Answer:
A
Explanation:
how are lipids like carbohydrates
Carbohydrates and lipids are both types of macromolecules found in living things. Carbohydrates are often referred to as sugars and are found in different forms such as glucose and maltose. Lipids are fats, oils, waxes and steroids and are made up of fatty acids.
name the blood vessels that convey blood to the brain
Answer:
Blood is supplied to the brain, face, and scalp via two major sets of vessels: the right and left common carotid arteries and the right and left vertebral arteries. The common carotid arteries have two divisions. The external carotid arteries supply the face and scalp with blood.
Explanation:
When NaCl is added to water, its bond will break. If C6H12O6 (glucose) is added to water, its bonds will not break.
True
False
Answer:
False.
Explanation:
The bonds become so strong that they make the glucose molecules separate.
Describe the type and ratio of organisms you would expect to find in a lake in a national park. give evidence to support your answer
Answer:
Algae would be the organism in greatest proportion in a lake in a national park.
Explanation:
A lake in a national park would have algae proliferation, which would be the largest organism in that lake. This is because a lake in a national park is subjected to great incidence of sunlight and large amounts of oxygen. This would facilitate and stimulate the reproduction of algae on a large scale, causing them to develop in the substrate, stones, pebbles, and in the water itself.
What exercise is most appropriate for testing muscular endurance?
A. Push-up
B. Bench press
C. Back squat
D. Bicep curl
Answer:
Push ups
Explanation:
Muscular endurance is when the muscle have the ability to withstand and sustain contractions that is constantly occur for a long period of time. It include the amount of repeated single exercise that the muscle can endure without resting. It ensures muscular fitness, muscular strength and power.
A good example of muscular exercise is push up the ability to constantly do it for a long time without rest or stopping.
The push-up is the most appropriate exercise for testing muscular endurance. Therefore, the correct option is A.
Muscular endurance is the ability of a muscle or group of muscles to sustain repeated contractions over a prolonged period of time.
The push-up specifically targets the chest, shoulders, triceps, and core muscles. It requires maintaining a plank position and lowering and raising the body by bending and extending the elbows.
By performing as many push-ups as possible without compromising form, an individual can assess their muscular endurance level.
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A farmer in Minnesota plants some tomato seeds in early spring. She plants them outdoors in soil and adds water every day. A few weeks later, nothing has happened. What is the most likely reason the seeds have not germinated?
Answer:
Other factors could affect the reason the seed didn't germinate because under suitable conditions depending on the variety it should germinate within 5 to 10 days from planting. However, the most likely reason it didn't germinate must be the Temperature.
Explanation:
From the question above, the farmer lives in Minnesota and she planted between March and May, meaning the temperature was way cold which is not suitable for tomato. One other valuable point was she planting outdoor which could also affect the performance of the tomato seedlings. Planting in early spring doesn't necessarily mean bad as some seeds might thrive under conditions explained above. For tomato, depending on temperature because too high temperatures could also affect the viability of the seeds. In Minnesota in early spring, it would have been better if she planted indoors to raise the temperature before transplanting as a balanced night temperature is also important for the seed viability.
Some other factors to be considered for seeds to germinate:
1. Water
2. Type of the soil
3. Seed depth in the soil
4. Nature of seed coat
5. Oxygen
6. Light
Which of the following is a polysaccharide often responsible for providing structure to plants?
A. Amylose
B. Cellulose
C. Glucose
Answer:
Explanation:
The anwer is B
Students in a science class were asked to investigate how missing or damaged
organelles affect cellular homeostasis for cells found in muscle tissues.
Which of the following questions should they ask to determine if these muscle cells
are functioning properly? (AKS 151)
At what rate do the chloroplasts of the cell need to capture enough sunlight to
meet the high energy needs of the cell?
At what rate do the ribosomes of the cell need to work to produce enough
glucose to meet the high energy needs of the cell?
At what rate do the mitochondria of the cell need to convert glucose to usable
energy molecules to meet the high energy needs of the cell?
At what rate does the cell wall need to break down its carbohydrate structure to
meet the high energy needs of the cell?
Answer:
At what rate do the mitochondria of the cell need to convert glucose to usable
energy molecules to meet the high energy needs of the cell?
Explanation:
Organelles are organ-like structures found in cells. The are responsible for the specific actions carried out by each cell. Each organelle has its own specific role to play. However, missing or damaged organelles can have effects on the cells.
Mitochondria are organelles found in cells of all eukaryotic living organisms e.g animal, plants as they are responsible for the synthesis of energy in form of ATP. Since the cells being investigated in this question is a MUSCLE CELL, which is only found in animals, then an appropriate organelle must be investigated.
The appropriate to be asked to know if muscles cells are functioning properly is: At what rate do the mitochondria of the cell need to convert glucose to usable energy molecules to meet the high energy needs of the cell?.
Note that, other options are incorrect because muscle cells do not have chloroplast and cell wall, while ribosomes are not site for glucose production.
Which of the following is not true about Darwin’s book On the Origin of Species?
a.
He worked on the manuscript for three years.
b.
It was successful.
c.
It explained his theory of evolution.
d.
It was based on his findings in South Africa.
Answer:
The correct answer is option D. It was based on his findings in South Africa.
Explanation:
The theory of natural selection was first planned in Darwin's book "On the Origin of Species" in 1859, which is the process by which life forms change after some time because of changes in heritable physical or behavioral qualities.
His book On the Origin of Species took three years time to complete as he worked on the manuscript for three years. It was successful book. However, it was not based on his work on africa.
Answer:
it's d
Explanation: just took the test
Enzymes are proteins that act as catalysts. The shape of enzymes can be altered by changes
in pH or temperature. Explain how this change of shape affects the function of the enzyme.
Answer:
Explanation:
Enzymes are proteins that act as catalysts. The shape of enzymes can be altered by changes
in pH or temperature. Explain how this change of shape affects the function of the enzyme.
20 POINT QUESTION!!! Does CORONAVIUS have all seven characteristics of a living thing? reproduction, ability to react to stimuli, growth & development, can process and use energy, regulation, organization/order, evolutionary adaptions?
no, it doesn't. viruses cannot reproduce without a host.
Are individual organelles (cell structures) living? Defend your answer.
Answer:
the cell structure is living
Explanation:
CELL! cells are living
PLZ HELP ME ASAP ITS DUE IN 1h
Which process connects glycolysis and the citric acid cycle?
A. lactic acid formation
B. acetyl CoA formation
C.electron transport
D. Krebs cycle
Answer: the answer is B
Explanation: i lied lolololloloolollololol
23. Which of the following explains nitrogen fixation. *
Answer:
Nitrogen fixation is the process by which atmospheric nitrogen is converted by either a nature or an industrial mean to a form of nitrogen such as ammonia.
Why is it important for scientists who study ecosystems to study more than the organisms that live there?
Help due tomorrow!!!
1. Which structure is not part of the endomembrane system?
(A) nuclear envelope
(C) Golgi apparatus
(B) chloroplast
(D) plasma membrane
The structure that is not a part of endomembrane system is chloroplast. The correct option is B.
What is endomembrane system?The endomembrane system is a membranous component system. The membranes of the nucleus, the endoplasmic reticulum, the Golgi apparatus, lysosomes, endosomes, vesicles, and the plasma membrane are all part of it. It doesn't include mitochondrial chloroplast membranes.
The endomembrane system is a network of membranes in the cell that serve to reconfigure, transfer, and bundle proteins and lipids.
The endomembrane system is a collection of eukaryotic biological membranes and organelles that work with each other to modify, package, and transport lipids and proteins.
Thus, the correct option is B.
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5 On his voyage on the HMS Beagle, Darwin saw fossils of giant sloths whose bones resembled bones of living sloths, but were much larger in size. Darwin hypothesized that the fossil sloths were related to sloths alive today. This hypothesis was based on (1 Point)
Answer:
A: observation and inferences
and on this one I am 100% sure it is right
Explanation:
Why is it important to understand both physics and chemistry when studying living things?
answer: both aspects , sameness &variety are the result of biological evolution.
Which three items should you be able to find in or near the sink when your lab is finished ? a. Used lab equipment, specimens, paper towels b. Chemical waste, used gloves in the sink, used paper towels c. Soap, paper towels, scalpel blades used in your lab d. Soap, paper towels, sharps container
Answer:
I would say the answer is C.
Explanation:
An organism that has the ability to maintain an internal temperature suitable for life.
ectotherm
endotherm
heterotrophs
species
Answer:
The correct answer is - endotherm.
Explanation:
Homeostasis is the process that is responsible for maintaining the internal body environment including the temperature of an individual in order to survive.
Endothermic organisms are the organism that maintains their body temperature and independent of environmental change where is ectothermic are dependent on the external environment to regulate their body temperature.
Thus, the correct answer is - endotherm.
Answer: Endotherm
Explanation:
which is flatworms locomotory organ tell the answer in full sentence
Answer:
Movement in some flatworms is controlled by longitudinal, circular, and oblique layers of muscle
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Write a short paragraph describing the role of all types of lipids
Lipid Biological Functions
-Chemical messengers.
-Storage and provision of energy.
-Maintenance of temperature.
-Membrane lipid layer formation.
-Cholesterol formation.
-Prostaglandin formation and role in inflammation.
Which term names the science of classifying organisms?
Answer:
Taxonomy
Explanation:
It's the science of naming, classification if an organisms.
At which stage of development does the embryo implant in the uterus?
Answer:
Blastocyst stage
Explanation:
A baby undergoes different stages of development before they become fully matured. It all begins with the process of fertilization which involves a sperm cell coming in contact with an egg.
After a successful fertilization, the fertilized egg travels down to the uterus where it undergoes series of cell division till it becomes a stack of arranged cells known as the blastocyst.
During the blastocyst stage, the embryo fastens itself to the edge of the uterus, this process is known as implantation.
Hence, the embryo implants in the uterus during the blastocyst stage.
which plant cell structures provide evidence that plants are living organisms?
Answer:
chloroplasts
Explanation:
Answer:
Chloroplasts or Nucleus
Explanation:
The Nucleus holds DNA, which is in every living thing. However, nucleus' are also in animal cell. Specifically in a plant cell, the chloroplasts provide the evidence since they help the plant make it's own food.
I need some help! What cell structure goes to what definition? The structures as well as the descriptions are below.
lysosome
vesicle
nucleus
Golgi apparatus
chloroplast
smooth endoplasmic reticulum
nucleolus
rough endoplasmic reticulum
ribosome
mitochondrion
1.
contains chlorophyll, site of photosynthesis
2.
contains chromosomes, directs cell’s activities
3.
contains hydrolytic enzymes
4.
membranous network that detoxifies and helps synthesize lipids
5.
membranous network that helps synthesize proteins
6.
modifies and stores the products of the ER
7.
site of cellular respiration and ATP production
8.
site of protein synthesis
9.
site of ribosomal RNA synthesis
10.
small membrane-bound sac within a cell
Answer:
1-chloroplast
2-Golgi apparatus.
Explanation:
which of the following is most consistent with the modern theory of evolution
The correct answer is Parents pass their physical traits to their offspring; those offspring with traits that help them survive in their environment are able to reproduce.
Explanation:
The modern theory of evolution explains the mechanisms that make organisms change. One of the main ideas this theory proposes is that organisms with traits that help them survive or reproduce have higher chances to pass their genes and traits to new generations. This mechanism makes certain traits to be favored and contributes to the evolution of organisms because after multiple generations certain traits will prevail while others will be eliminated.
Moreover, this theory specifies genes in an organism are not acquired or modified during its life but these are the results of the traits passed to the organism by its parents and evolution occurs only after a long time or multiple generations. According to this, the first option is the correct one.