An educated guess is an hypothesis
Which of the following statements about the smooth endoplasmic reticulum is/are correct?
Liver cells are abundant in SER.
The testes and ovaries are tissue types whose cells are abundant in SER.
The SER is the primary location for synthesis of membrane-bound proteins.
Cholesterol is made in the SER.
The luminal face of the SER is the main site at which membrane lipids are synthesized.
Phospholipids are synthesized from cytosolic water soluble precursor molecules.
Flippases are the enzymes that allow lateral movement of a lipid within a leaflet.
Answer:
Liver cells are abundant in SER. The testes and ovaries are tissue types whose cells are abundant in SER.Cholesterol is made in the SER. Phospholipids are synthesized from cytosolic water soluble precursor molecules.Explanation:
This is because liver cells contain enzymes that metabolize various lipid-soluble compounds.
This is because testes and ovaries produce steroid hormones (cholesterol is the precursor for their synthesis).
ER is the organelle at which all membrane lipids are synthesized.
Phospholipids are the main lipids that are the main structural components of the cell membrane. They are synthesized on the cytosolic side of the ER membrane, from water-soluble cytosolic precursors.
Which of the following muscles is voluntary
muscles in your arm, give brainliest if right
Voluntary muscles, such as skeletal muscles, are those that can be consciously controlled by an individual. Cardiac muscles, which are often mistakenly thought to be voluntary, are actually involuntary and operate automatically. Skeletal muscle movement includes both conscious actions and involuntary reflexes.
Explanation:Understanding Voluntary MusclesThe muscles that can be controlled by an individual's will are known as voluntary muscles. An example of a voluntary muscle is the skeletal muscle, which is attached to the skeleton and enables movement of the body. These muscles are under conscious control, meaning that we can decide when to move them. For instance, you can choose to lift your hand or walk. However, skeletal muscles can also contract involuntarily in response to reflex actions, such as withdrawing your hand when you touch something hot.
It's important to correct a common misconception: while cardiac muscles, found in the heart, are also muscle tissue, they are not voluntary but rather involuntary muscles which cannot be consciously controlled.
Involuntary muscles, including both cardiac and smooth muscles, operate automatically without conscious thought. They perform critical functions like pumping blood through the heart and moving food through the digestive system.
Which bone is considered the longest bone in the human body?
The femur is the answer you are looking for.
An organism that feeds on the body fluids or tissues of another organism, but does not kill it, is called a ____
It’s call a predator
Answer:
It's a parasite, that other comment is so wrong.
Explanation:
Placing an object in a known amount of water, the quantity of the water that rises helps you find the volume by ____.
The volume of an object submerged in water can be determined by how much water it displaces, also known as the water displacement method. This principle is often used in physics to measure the volume of irregularly shaped objects.
Explanation:Placing an object in a known amount of water, the quantity of the water that rises helps you find the volume by displacing the water. This method, known as the water displacement method, is often used in physics to determine the volume of an irregularly shaped object.
To use this method, you place the object in a graduated cylinder partially filled with water. The water level rises when you insert the object since it displaces its own volume of water. The increase in water level corresponds to the volume of the object. This is based on the fundamental principle that the volume of liquid displaced when an object is submerged in it, equals the volume of the object that is submerged.
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which of these is an example of climate?
A. last month's total rainfall
B. a weather forecast
C. the current temperature
D. An annual weather pattern
The answer to the question is D. An annual weather pattern.
The question, "Which of these is an example of climate?" involves understanding the difference between climate and weather. Climate refers to the long-term, predictable atmospheric conditions of a specific area, while weather pertains to atmospheric conditions over a short period. Therefore, the correct answer is D. An annual weather pattern, as it encompasses the long-term averages of weather in a specific location, which is indicative of climate. Last month's total rainfall or a specific day's temperature are examples of weather events, not climate. Similarly, a weather forecast predicts short-term atmospheric conditions and is also not an example of climate.
Classify Is blood classified as a cell, a tissue, an organ, or an organ system? Explain the classification.
its a cell because blood is made from red blood cells
A biology student is investigating tropisms in plants. The student observes the response of the roots of radish seedlings to a light source placed to the right of the roots. All of the roots grow away from the light source. Which of the following tropisms is the student MOST LIKELY investigating?
gravitropism
thigmotropism
hydrotropism
phototropism
Answer:
phototropism
Explanation:
The student was investigating phototropism.
The student wanted to know the response of the roots to light, that is why he exposed them to light.
Roots naturally exhibit two types of tropisms.
The first is gravitropism whereby they tend to grow downwards.
The second is hydrotropism whereby they grow towards the direction of water.
In the above experiment, no water was provided, the roots grew away from the light source but not specifically downwards.
which characteristic do plants, people and flatworms share?
A). They exchange gases with the environment
B). They all have digestive systems that break down food
C). They all undergo photosynthesis
D). They all use a muscular system for movement
Answer: Option A
Explanation: Plants, flatworm and people share the similar characteristics as they exchange gases with the environment.
The exchange of gases from the environment takes place differently in different types of organisms.
In case of flatworm it takes place through its skin, plants exchange gases through their leaves and animals respire through lungs.
The common character shared by all the three organism is exchange of gases.
Which one of the following most closely approximates the number of replicons in a human focus of replication?a. 1b. 50c. 100d. 300e. 30 000
The answer is:
E. 30,000
Since a replicon is known as the amount of DNA which is replicated from a single ori. Since bacteria only have one ori, they only have one replicon. The human genome has approximately 30,000 ori, so there will also be 30,000 replicons in a human focus.
why are fertilizers so bad? List how fertilizers are making their way from land to the ocean
The ferilizers could polute the ocean through erosion?
Fertilizer can reach the ocean through the process run off in the water cycle
CO2 enters and O2 escapes from a leaf via.
A) stomata.
B) grana.
C) thylakoids.
D) stroma.
Answer is A, stomata.
The correct answer is stomata. These are tiny openings in the leaves that allow for the intake of CO2 for photosynthesis and the release of O2, the byproduct of the process.
Explanation:The correct answer to this question is A) stomata. Stomata are tiny openings or pores found on the surface of leaves that control gas exchange. They allow the carbon dioxide (CO2) to enter into the leaf, which is a necessary component for photosynthesis, and permit the escape of oxygen (O2), a byproduct of photosynthesis. Options B) grana, C) thylakoids, and D) stroma are all components of a leaf's chloroplasts and are involved in photosynthesis, but not in gas exchange directly.
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A potassium-40 sample starts with 50 atoms, and 1.25 billion years later, there are 25 atoms. What is the half life of potassium-40?
A. 25 years
B. 40 years
C. 1.25 years
D. 2.5 years
Potassium-40 has a half life of 1.25 billion years.
Explanation;New amount = Original amount × (1/2)^n ; where n is the number of half lives.
Original amount is 50 atoms
New amount is 25 atoms
Therefore;
25 = 50 × (1/2)^n
1/2 = (1/2)^n
Thus; n = 1
n = 1 which is equivalent to 1.25 billion years
Therefore;
Potassium-40 has a half life of 1.25 billion years.
Answer:
C
Explanation:
Which of the following is not a characteristic shared by all chordates?
fins
hollow nerve chord
pharyngeal pouches
notochord
Fins
Fins are not a characteristic of all chordates
Explanation;All Chordates share four key features, which includes; a notochord, a dorsal hollow nerve cord, pharyngeal slits, and a post tail.The notochord provides skeletal support, gives the phylum its name, and develops into the vertebral column in vertebrates. The dorsal hollow nerve cord develops into the central nervous system: the brain and spine. Pharyngeal slits are openings in the pharynx that develop into gill arches in bony fish and into the jaw and inner ear in terrestrial animals. The post tail is a skeletal extension of the posterior end of the body, being absent in humans and apes, although present during embryonic development.The characteristic that is not shared by all chordates is 'fins'. While fins are seen in certain subgroups of chordates, not all chordates possess them. The three main features common to all chordates are a hollow nerve chord, pharyngeal pouches, and a notochord.
Explanation:The characteristic that is not shared by all chordates is fins. The chordates, which include vertebrates, have three main defining features: a hollow nerve chord, pharyngeal pouches, and a notochord. However, not all chordates have fins. For instance, chordates like mammals and birds do not possess fins, but they do have the other three common features.
Fins are typically seen in aquatic or semi-aquatic species such as fish, but they are not a necessity for all chordates. Fins are used for movement, balance, and steering in an aquatic environment, but they are not a feature shared universally by chordates. Thus, while fins are common in certain subgroups of chordates, they are not a characteristic shared by all.
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How are microtubules thought to affect cell shape in plants? Microtubules of the plant cell cortex are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape. Microtubules of the plant cell vacuole are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape. Microtubules of the plant cell cortex are thought to affect the movement of lipid-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape. Microtubules of the plant cell wall are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape. 5. Microtubules of the plant cell nucleus are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape.
The correct answer is: Microtubules of the plant cell cortex are thought to affect the movement of cellulose-synthesizing enzymes in the cell membrane, which, in turn, affect cell wall growth and shape.
Plants have the ability to control the direction of cell expansion as a way of shaping growth. Microtubules are structures that help them to regulate the direction of growth. For example, transverse microtubules within the plant cell have the role to constrain the movement of cellulose synthase complexes that are essential for elongation growth.
Respiration is a process during which energy is released from glucose. This energy is used for processes such as growth of the body.
the answer is
photosynthesis
According to the BiomeViewer, Mt St Helens/Spirit Lake is in a __________ biome
Temperate Coniferous Forest
Temperate Deciduous Forest
Boreal Forest
Tundra
The answer is Temperate Coniferous Forest. Hope this helps!
Answer:
Mt St Helen’s Lake is an example of Temperate Coniferous Forest.
So correct answer is option A.
Explanation:
It is located in Washington DC in USA. The Mt St Helen’s Lake is also called Spirit lake. It is actually a volcanic lake, formed on the crater of Mt St Helen. It is situated in the temperate region. So the vegetation is of temperate region.
Being a mountainous region, there’s no deciduous trees. Whereas, conifers occupy the region, leading to a temperate coniferous vegetation.
All plant and animal groups existing together and the physical factors with which they interact compose a(n)
a.climate.
b.kingdom.
c.ecosystem.
d.weather pattern.
Ecosystem. it is defined as a biological community of interacting organism and their physical environment.
Which of the following has the MOST similarity in nucleotide sequence?A. sister chromatidsB. complementary strands of DNAC. homologous chromosomesD. nonhomologous chromosomesE. maternal and paternal copies of the same chromosome
B because you can get DNA from people
A relationship in which one species benefits and the other name for benefits nor is harmed is
the relationship is called commensalism. it is a relationship in which the one organism benefits and the other is nor harmed and nor benefited. contrary to this there exist a relationship called parasitism where the parasite benefits from the organism and the host is damaged.
which of the following particles is the fundamental unit of all matter, both living and nonliving ?
a)neuron
b)electron
c)atom
d)cell
Answer:
c)atom
Hope this answer correct :)
The fundamental unit of all matter is the atom, consisting of protons, neutrons, and electrons. Cells are the smallest units of life but not the fundamental unit of all matter. Electrons are fundamental subatomic particles known as leptons.
The fundamental unit of all matter, both living and nonliving, is the atom. Atoms are the basic building blocks of matter and consist of three main components: protons (positively charged), neutrons (neutral charge), and electrons (negatively charged). While cells are the basic building blocks of life, it is atoms that make up cells and everything else in the universe. Protons and neutrons form the atom's nucleus, which has a positive charge because of the protons. The electrons move around this nucleus in the electron cloud, attracted by the positive charge.
It's important to note that while cells are indeed the smallest independently functioning biological units in an organism, they are not the fundamental unit of all matter. Additionally, the electron is an example of a fundamental subatomic particle, specifically a lepton, which is different from the composite particles like neutrons that contain quarks.
Which of the following mutations could lead to constitutive expression of the genes of the lac operon?
A mutation in the lac-Z gene
A super repressor mutation
A mutation in the operator sequence
A mutation in the lac-Y gene
the answer is A.
~hope this helped
Today, it's widely accepted that all of the two-legged meat-eating dinosaurs known as theropods— including t. rex and albertosaurus—had at least very simple fuzzy feathers covering their bodies. according to the tree you built, what distinguishes the feathers of modern birds and archaeopteryx from the feathers of other theropods?
Answer:
I got this question to its actually shaft
Which of the following statements about xylem is incorrect?
A) It conducts material from root tips to leaves.
B) The conducting cells are part of the apoplast.
C) It transports mainly sugars and amino acids.
D) It typically has a lower water potential than is found in soil.
E) No energy input is required for transport.
The incorrect statement is: C) It transports mainly sugars and amino acids.
Xylem together with floem is a plant tissue involved in the transport of substances through the plant.
Xylem’s role is to transport water (sometimes and nutrients) from roots to stems and leaves and to provide support to the plant. Xylem consists of a specialized, water-conducting cells - tracheary elements (tracheids and vessel) which are long, narrow and hollow.
PLEASE HELP ME- 20 points
Use the chart below to answer the question.
Which student correctly compared the outcomes of meiosis and mitosis?
should be student 3. As in meiosis four haploid daughter cells are formed. As meiosis is the type of nuclear division that halves the chromosome number.
Student 3 correctly compared the outcomes of meiosis and mitosis.
What do you mean by Meiosis?Meiosis may be defined as a type of cell division that produces four haploid cells from a parental cell. It is also known as reductional division.
Mitosis produces two daughter cells that are diploid in nature while meiosis produces four daughter cells that are haploid in nature.
Therefore, Student 3 correctly compared the outcomes of meiosis and mitosis.
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Which of the following combinations correctly matches a phylum to its description?
a. echinodermata - bilateral symmetry as a larva, water vascular system
b. nematoda - segmented worms, closed circulatory
c. cnidaria - flatworms, gastrovascular cavity, acoelomate
d. platyhelminthes - radial symmetry, polyp and medusa body forms
The answer is B
The phylum Nematoda (roundworms) is one of the most common phyla.
There more than 15,000 known species of roundworms, however, there are many thousands of individual varieties nematodes, as well.
The study of animals is called zoology.
The correct answer to the question is option B which is Echinodermata – bilateral symmetry as a larva, water vascular system.
What is bilateral symmetry?When a species has two equal halves when it cut through the specific plane is called bilateral symmetry.According to the question, the Echinodermata has bilateral symmetry and consists of a water vascular system that helps to move in any direction.
An example of the Echinodermata is starfish.
Hence, the correct answer to the question is option B.
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Which structure aids sarcodine protists in movement and feeding?
a. chlorophyll
b.flagella
c.pseudopods
d.cilia
Answer:
This is really late but to anyone else who needs the answer: the answer is PSEUDOPODS. They are a foot that provides movement and ingests food.
Explanation:
If a rifleman's gunsight is adjusted incorrectly, he might shoot bullets consistently close to 2 feet left of the bull's-eye target. draw a sketch of the target with the bullet holes. does this show lack of precision or bias?
b. draw a second sketch of the target if the shots are both unbiased and precise (have little variation). the rifleman's aim is not perfect, so your sketches should show more than one bullethole.
Not going to draw it since i'm horrible at drawing but it's pretty simple. The shots that are consistently 2 feet left means his aim is fine but his sites are off. It shows no lack of precision.
The second one is pretty simple aswell. every rifleman can't shoot the same hole every single shot. Many things affect it but the same technique the same time for every shot with "zero'd" sights means the rounds should be inpacting within a relativly small shot group.
Depends on organisms passing genes to the next generation. Why do organisms resemble those from long ago?
Evolution takes a very long time and so the genes won't be completely different
What is an ADVANTAGE of sexual reproduction?
A) Two parents are required
B) One parent is required
C) It leads to genetically diverse offspring
D) It leads to genetically identical offspring
C) It leads to genetically diverse offspring is your answer.
Genetic diversity allows the passing down of traits that are likely to increase chances of survival, such as immunity to certain diseases. However, genetic diversity cannot be confused with evolution, as evolution can only lead to deterioration of the being, rather then adaptability & survivability.
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