Answer:
Living birds lack teeth.
Most mammals lack shelled eggs.
Whales and snakes lack legs.
Explanation:
Living birds lack teeth, Most mammals lack shelled eggs and Whales and snakes lack legs are the characteristics that are present in modern animals as compared to their ancestors. These changes occur in the organism due to evolution that occurs with the passage of time and the main reason for that is change occurs in the environmental conditions for organism which force them to make changes which is best for the environment.
All cells make the same proteins, true or false
answer:true
Explanation:
Proteins are essential components of our cells, tissues, and organs. Proteins are large molecules with complex structures. Each of the enzymes in our cells are proteins that have specialized functions in the operations of the cells.
Which of the following is an organism whose cells each contain a membrane
bound nucleus?
Answer:
D. Eukaryote
Explanation:
An organism that has membrane-bound organelles will have more complex organelles like mitochondria, Golgi apparatus, and ER. These are known as Eukaryotes. Additionally, they will have a nucleus that has the DNA coiled inside. Prokaryotes do not have membrane-bound organelle and the DNA floats in the cytoplasm. Most plants and animals are eukaryotes and all multicellular organisms are too.
What is Saturn ? Explain your answer.
Answer:
Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It only has one-eighth the average density of Earth; however, with its larger volume, Saturn is over 95 times more massive.
Explanation:
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Saturn is the sixth planet from our Sun (a star) and orbits at a distance of about 886 million miles (1.4 billion kilometers) from the Sun. there you go
why is it important to keep the temperature and amount of water the same when testing the surface area.
Answer:
The temperature and the amount of water need to be kept the same so that the only variable that changes is surface area
Explanation:
Answer:
The temperature and the amount of water need to be kept the same so that the only variable that changes is surface area. If you allow the temperature and/or the amount of water to change too, you will not know which variable is causing the changes that you observe
Explanation:
edge sample
Question 6 of 15
Time and velocity are both vectors.
A. True
B. False
SUBN
Answer:
true
Explanation:
because we need both
Which of the following changes takes place during the second trimester of a
woman's pregnancy?
A. The fetus begins to form teeth.
0 0
B. The fetus begins rhythmic breathing movements.
C. The fetus's hands and feet appear.
D. The fetus develops toenails, lips, and eyelashes.
In FEOTAL DEVELOPMENT, there are various changes which occurs Both in the foetus and the mother. These changes are broadly grouped into three stages which includes:
--> First trimester: This stage starts from conception to 12 weeks. This stage in pregnancy involves the following changes in the foetus which is called an embryo at this stage:
• the major organ systems which includes the digestive system, the heart and circulatory system begins to develop
• facial features starts to develop.
• fetus begins rhythmic breathing movements at 10th week of this stage and continues through out the gestation period.
• teeth starts to harden and connect to the jaw bone at the 10th week of this stage.
• By the end of this stage baby's arms, hands, fingers, feet and toes are fully formed.
--> SECOND TRIMESTER: This stage starts from 13th week through 28th weeks of pregnancy. It involves the following changes:
• the heartbeat is now audible and this can be detected using the instrument called doppler.
• Your baby is covered by fine, feathery hair called lanugo and a waxy protective coating called vernix. Eyebrows, eyelashes, fingernails, and toenails have formed.
• the finger and toes are well defined with the prints visible enough.
--> Third trimester: This lasts from 29th week to due date which is usually at 40th week. The following changes occurs
• the brain continues to develop rapidly so that it can blink, close the eyes, turn the head, grasp firmly, and respond to sounds, light, and touch.
• it continues to develop reserves of body fat which will help out in early days after birth.
Therefore the CORRECT option is D which states that the fetus develops toenails,lips and eyelashes.
https://brainly.com/question/14096830
Give one example of drug that is ligand to muscarine receptors
Answer:
Muscarinic Agonists
Scopolamine.
Muscarinic Acetylcholine Receptor.
Eicosanoid Receptor.
Acetylcholine.
Pilocarpine.
Cholinergic.
Carbachol.
Agonist.
what are the causes of the environmental pollution ?
elevated the prediction using the specific experimental procedure they collected the experimental by catching mice on the beach and releasing them in lines and by catching mice from Inland releasing them on beach it wash to see if they were eaten by predators predators true or false
Answer:
True
Explanation:
The mice captured from beach would find it difficult to move in lines as it has habit to move freely in any direction. The mice will move slowly. The second mice captured from inland and released on beach would first wait before moving and it will analyze the environment. There are high chances that it nay be eaten by predator such as crab.
What is the relationship between CdKs and cyclins?
Answer:
By definition, a CDK binds a regulatory protein called a cyclin. Without cyclin, CDK has little kinase activity; only the cyclin-CDK complex is an active kinase but its activity can be typically further modulated by phosphorylation and other binding proteins, like p27.
How does the ear pick up sound waves from the external environment? (any bots or links added will be reported!)
Answer:
The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.
Explanation:
The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.The auricle a portion of the outer ear collects sound waves, channeling into the ear canal where the sound is amplified.Answer:
Explanation:
Part of the east coast of South America and the west coast of Africa have matching fossils within the same series or rock layers. This provides evidence that these continents were once *
A) Separated by a much larger ocean
B) Joined together as one landmass
C) located near the North Pole
D) In a different hemisphere
The photos below show three types of muscle tissue. Which type of muscle is
found only in the heart?
A
B
C
A. C
B. A
C. A and C
O DB
Answer:
c
Explanation:
The image shows two different organisms.
Which of these characters is shared by both?
(a) Both are plants
(b) Both depend on food prepared by others
(c) Both have chlorophyll to perform photosynthesis
(d) Both can help in nitrogen fixation
Answer:
'a. both are plant ' these characters is shared by both
Describe two ways in which the above law protects citizens against human trafficking
Answer:
The law in question is not included so I will include tow different laws and how they protect people from human trafficking.
1. The Victims of Trafficking and Violence Prevention Act (TVPA).
This Act made human trafficking a Federal crime while also establishing rules on how to prosecute human traffickers and getting the victims of trafficking reintegrated into society and protected. Under this Act therefore, citizens are protected because the law would act as a deterrent to a lot of would-be traffickers.
2. The Mann Act of 1910.
Under this Act, it is a crime to make promises to people such that they cross state lines and are then involved in activities they did not sign up for - this is a definition of human trafficking so this law protects citizens from that.
Which epithelial lining is found in the trachea
Which statement best explains the process occurring in step 4 of the life cycle ?
Answer:
d (pls give brainliest)
Explanation:
If oxygen is more concentrated outside a cell than inside
Answer:
What happens if the concentration of oxygen molecules outside the cell is lower than that inside the cell? Diffusion.....the oxygen molecules will move inside the cell until the concentration is equal inside and outside. Why do many cellular processes depend on osmosis?
Explanation:
Three common types of passive transport include simple diffusion, osmosis, and facilitated diffusion.
If oxygen is more concentrated outside a cell than inside diffusion will occur.
Oxygen is an element that is for cellular respiration which are metabolic processes that are essential for life.
A cell is the smallest and basic structure of organisms that is surrounded by a membrane.
Diffusion is the process by which molecules of a substance move from a region of where they are highly concentrated to a region where they are less concentrated.
Therefore when oxygen molecules is more concentrated outside a cell than inside, a concentration gradient exits between the inside and outside of the cell leading to diffusion of oxygen into the cell.
Learn more here:
https://brainly.com/question/7161064
Rickettsia typhi is a species of infectious bacterium that is an obligatory intracellular parasite. This means that, similar to viruses, R. typhi cannot reproduce and survive outside of a eukaryotic cell. Why do we consider viruses nonliving, but rickettsia alive
Answer:
Due to its characteristics.
Explanation:
We consider viruses are nonliving, but rickettsia are living because rickettsia have the characteristics of bacteria which is a living and has unique structure. It also survives outside the living cell but not for long time. The rickettsia remain in their shape and does not form crystalline structure like viruses outside the cell. If there is suitable environment for rickettsia, it can survive in that environment.
Mitosis:
a. takes place only in brain tissue
b. creates cells that are different from each other
c. makes sex cells for sexual reproduction
d. creates identical cells for growth, repair, and asexual reproduction
Answer:
d. creates identical cells for growth, repair, and asexual reproduction
Explanation:
Mitosis is used by somatic, or body, cells; this is how they reproduce. Since the new cells are intended for the same job, they are made identical to the parent. Additionally, mitosis only includes one parent cell so it is asexual. Sexual reproduction occurs through meiosis. Mitosis begins with one parent cell and ends with two identical daughter cells.
which organisms replicate cells by mitosis?
a. animals and bacteria
b. bacteria and plants
c. animal and plants
d. archaea and bacteria
e. archaea and plants
Answer:
d.??????????????????
Answer: C!
Explanation: eukaryotic cells may divide via either mitosis or meiosis. only sexually reproducing eukaryotes can engage in meiosis. all eukaryotes — regardless of size or number of cells — can engage in mitosis.
Having no cell nucleus, archaea do not reproduce via mitosis; rather, they procreate using a process called binary fission. So D AND E are eliminated. And so is B because that has bacteria.
SO FINAL ANSWER; mitosis happens in eukaryotes, plant and animal cells
Hooke made scientific advancements that revolutionized our understanding of the basic building blocks of life.
Which choice refers to a single population?
It’s biology someone help me please it’s 4:04 am rn and am literally crying
Answer:
OBSERVATION2 POND
SO ANSWER IS ecosystem
Explanation:
i need help asap please!!
Answer:
commensalism
an association between organisms in which one benefits and the other derives nor harm
1 Producers
why this is true?
consumers.
generally found at the beginning
of a food chain. Which statement best explains
(1) Producers are usually smaller in size thân
(2) Producers do not rely on other organisms
(3) There are always more consumers than
producers in food chains
(4) Consumers are always more complex organisms
than producers.
for food.
Answer:
(2) Producers do not rely on other organisms
Plants use the proton electrochemical gradient across the vacuole membrane to power the accumulation of salts and sugars in the organelle. This accumulation creates hypertonic conditions in the vacuole. Why does this not result in the plant cell swelling and bursting?
Answer:
Due to movement of water to the outside environment.
Explanation:
This hypertonic solution is not result in the plant cell swelling and bursting because hypertonic causes shrinkage of cell instead of swelling. Swelling of cell occurs when the cell experiences hypotonic solution due to presence of less amount of solutes inside the cell. In hypertonic solution, there is less amount of water in the solution as compared to the cell so the water in the cell moves towards outside of the cell causes shrinkage of the cell.
Beans may be tall or short depending on one locus, and they may have long or stubby pods, depending on another locus. A tall, stubby plant was crossed with a short, long plant. The F1 plants were all tall and stubby. Which of the following PHENOTYPES do you expect to occur least often in the F2?"
a. "tall, stubby"
b. "short, stubby"
c. "short, long"
d. "tall, long"
Answer:
c. "short, long"
Explanation:
The question being described involves two different genes; one coding for beans length and the other for pod length. According to the question, beans may be tall (T) or short (t) while they can also have have long (L) or stubby pods (l).
From the phenotypic ratio result of the F1 generation, which were all tall and stubby, it is clear that tall bean (T) and stubby pods (d) are highest balloon. According to Gregor Mendel's ratio of dihybrid cross; 9.3.3:1, the least occuring phenotype, which is 1 of 16, can be "short, long".
If the number of photosynthetic organisms on Earth decreased drastically, which would happen as a result?
A. Less water would be available on Earth’s surface.
B. Less solar energy would reach Earth’s atmosphere.
C. More oxygen gas would be found in Earth’s atmosphere.
D. More carbon dioxide gas would be found in Earth’s atmosphere.
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Answer:
brainliest!?
Explanation:
