Answer:
Soil erosion and lost of fertility.
Explanation:
The farming practices that expose topsoil to water and wind often result in erosion of the soil because the wind and water takes particles with them. If water and wind removes the soil particles continuously then the land become barren and lost its fertility which leads to lower production of food crops that ultimately threaten the food production for the population.
Question 1
Which of these blood components is NOT involved in immune defenses against infection?
antibodies
complement
erythrocytes
leukocytes
Which mechanism of evolution is caused by a population moving to a secluded mountain valley that is cut off from any other populations?
Natural selection
Mutations
Genetic drift
Gene flow
Which statement correctly describes the rock cycle?
a Igneous rock can only form by heat and pressure.
b Magma can only form by compaction and cementation
c Igneous rocks form from volcanoes
d Metamorphic rocks form by weathering, erosion and then deposition.
Which level or organization would the endocrine fall under?
a.organ
b.system
c.cell
d.organism
Answer:
b
Explanation:
The endocrine falls under the system level of organization. It is called the endocrine system. So the correct option is B.
What is the endocrine system?The endocrine system is an organ system of the body. It is made of special organs called glands. The glands are responsible for the synthesis and secretion of hormones.
Hormones are called the chemical messengers of the body. They help in the coordination of almost all of the functions of the body. Some of the functions coordinated by the hormones are growth and development, mood and emotions, sleep, sexual functions, etc.
Hormones are specific for the function and carry it out by reaching the target cell. The level of hormones in the blood is monitored by the endocrine system.
The rise in the level of hormones is sensed by the pituitary gland near the brain which signals the gland to stop the production of the hormone.
Therefore, the endocrine system is an organ system and the correct option is B.
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How are humans and chickens related ???
Answer:
they both have feet but like humans
Answer:
Because we are both animals .
Explanation:
About 60 percent of chicken genes correspond to a similar human gene. However, researchers uncovered more small sequence differences between corresponding pairs of chicken and human genes, which are 75 percent identical on average, than between rodent and human gene pairs, which are 88 percent identical on average.
Which of the following is TRUE about prokaryotes?*
They can be multicellular
Their cells are larger than eukaryotic cells
Their cells lack a nucleus
They evolved after eukaryotic cells.
How are our red blood cells similar to a bus or taxi?
Answer:
Both erythrocytes and bus/taxi drivers' main job is to transport important components. Erythrocytes transport oxygen and carbon dioxide through the body. Likewise, taxi/bus drivers carry citizens through the city. Citizens are important to the city just as oxygen is important to the body. Taxi drivers move through, and reach all parts of the city; similar to how erythrocytes transport oxygen all throughout the body. In addition, there are great amounts of both Erythrocytes in the body and taxi/bus drivers in the city.
Which of the following is NOT a true statement about the kidneys?
A) Blood leaves the kidneys through the ureter
B) The kidneys filter about 2,000 L of blood
C) The kidneys contain microscopic filters that clean the blood
D) A concentrated mixture of waste materials are collected in the kidneys of excretion
Livestock emissions can lead to acid rain.
True or false ?
Answer:
true i think
Explanation:
PLSSSS HELP ASAP
Body systems interact with one another to carry out life processes. When we eat food, it is broken down into nutrients that can then be used by body cells for metabolic processes and building cellular structures. Many body systems are involved in this process. Select the body systems that would NOT be involved in the breakdown and utilization of nutrients.
Answer:
Reproductive System
All the body systems have one role or the other to play in digestion and absorption. Even the excretory system removes waste and toxins from the body, leaving the useful materials.
However, the reproductive system is not actively involved in digestion.
How was Carlos Linnaeus important to evolutionary biology
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Swedish naturalist and explorer Carolus Linnaeus was the first to frame principles for defining natural genera and species of organisms and to create a uniform system for naming them, known as binomial nomenclature
Ultraviolet radiation can be felt as heat.
O True
O False
Answer:
its true.
Explanation:
have a nice day :)
Put the following organisms in an aquatic food chain in the order in which energy flows through them, explaining the reason for their placement.
small fish, mammal, phytoplankton, zooplankton
Explanation:
Phytoplankton, Zooplankton, Small Fish, Mammal
Phytoplanktons are the small photosynthetic organism that can produce their own feed and so are the producers in this food chain. Zooplanktons are small organisms incapable of producing their own food and eat phytoplanktons. Small fishes consume zooplanktons since due to their small size they are unable to eat bigger organisms. Mammals eat small fishes since they are omnivorer.
The correct order in which energy flows through organisms in an aquatic food chain is: Phytoplankton ⇒ Zooplankton ⇒ Small fishes ⇒ Mammals.
What is an aquatic food chain?The food chain in an aquatic habitat is an aquatic food chain. It often starts with the simple algae or phytoplankton as producers, followed by zooplankton which eats them. Giant fish, sharks, and whales, which consume zooplankton, that is eaten by small fishes and crustaceans. A water-based food chain is known as an aquatic food chain.
The energy flow in an aquatic food chain starts with the phytoplankton with maximum energy, eaten by zooplankton which are small organisms in water body, zooplanktons eaten up by the small fishes which are then eaten by large fishes or mammals.
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Temperature surrounding a victim's body that is colder than normal body temperature will
A. Have no effect on the rate of cooling
B. Decrease the rate of cooling
C. Speed up the rate of cooling
i need help please asappppp!!!!
Answer:
Option A is the answer, that is, molecules of red ink move through the membrane by diffusion.
Explanation:
This is because diffusion is the movement of molecules from a region of higher concentration to a region of lower concentration.
(GIVING BRAINLIEST!!)
Which of the following is an example of a difference between planets in the solar system?
A) A planet can have a surface made of either liquid or gas.
B) Some planets have thick atmospheres, while others have thin atmospheres.
C) A planet must have a moon, but it can differ in terms of its size.
D) All planets have rings, but some are very hard to see with your eyes.
Answer:
A
Explanation:
others answers give variables that still apply to planets
An example of a difference between planets in the solar system is some planets have thick atmospheres, while others have thin atmospheres. The correct option is B.
What is a solar system?The Solar System is made up of the Sun and the planets that orbit it, including Earth. Other planetary systems are occasionally referred to as exoplanetary systems.
A group of gravitationally bound non-stellar objects in or out of orbit around a star or star system is known as a planetary system.
Some planets have thick atmospheres, while others have thin atmospheres. These planets have different densities, some planets are gaseous and some are solid.
Therefore, the correct options are B). Some planets have thick atmospheres, while others have thin atmospheres.
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chlorella is single celled and photosynthetic organism true or false?
Answer:
false
Explanation:single cell of Chlorella is an independent life form. It is called a unicellular organism.
In which environment would mineral formation caused by high pressures and high temperatures most likely occur?
a lava flow
deep within Earth
a cave
the ocean
I will give brainly and 20 points im broke on points k \
Which statement is correct concerning hereditary information?(1) A chromosome is composed of many genes.(2) A gene is composed of many chromosomes.(3) Each chromosome carries the same information.(4) Each gene carries the same information.
Answer: (1) A chromosome is composed of many genes.
A gene is a sequence of DNA, which are instructions on how to make proteins for the cell. Proteins are then used as building blocks to make tissue or other essential things the body needs. Those proteins also determine things like a person's eye color. Each gene has a stop and end point. When you bundle a bunch of genes together, you form a group known as a chromosome. Each chromosome has a different role to play, so not all chromosomes carry the same information.
Do sea horses reproduce asexually or sexually
Answer:
asexual reproduction
Explanation:
Animal Reproduction
In asexual reproduction, an individual can reproduce without involvement with another individual of that species. Sexual reproduction in seahorses: Female seahorses produce eggs for reproduction that are then fertilized by the male.
Sea horses reproduce sexually.
Is a sea horse asexually or sexually?Sea horses reproduce sexually by internal fertilisation. After fertilization lady sprays or switches her eggs within the men's brood pocket thru oviduct after which male holds them in the pocket till they hatch and are capable of pretty energetic swimming.
Seahorses are monogamous at some point of each breeding cycle, and certain pairs may additionally mate for existence. The mating dance can maintain for hours. The couple swims together, twining tails in a water ballet. A female has an ovipositor for depositing her eggs in a male's brood pouch.
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The closest star to our solar system is the _____.
Alpha Centauri
Sun
Northern Star
Answer:
Explanation:
true and keep it up
Answer:
Alpha Centauri.
Explanation:
Hope it helps.
Which process occurs only in autotrophs and never in heterotrophs?
A. protein synthesis
B. food digestion
C. cellular respiration
D. photosynthesis
Answer:
D
Explanation:
Most autotrophs make their "food" through photosynthesis using the energy of the sun. Heterotrophs cannot make their own food, so they must eat or absorb it.
The process that occurs only in autotrophs and never in heterotrophs is photosynthesis. The correct option is D.
What are autotrophs and heterotrophs?Autotrophs are organisms that produce their own food, which means they do not need to hunt or look for food, such as plants.
Heterotrophs are animals that are unable to produce their own nutrients, so they must rely on an external source of energy, which they obtain through hunting, scavenging, and other means.
Photosynthesis only occurs in autotrophs, as they produce their own food through this process. Most autotrophs obtain their "food" by using the energy of the sun via photosynthesis. Heterotrophs are unable to produce their own food, thus they must consume it or absorb it.
Therefore, the correct option is D. photosynthesis.
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Mr.Goldsmith suggested that animals must capture energy from their environment. A example of this would be___
Answer:yes
Explanation:
Yes
describe two major functions of roots. explain why these functions are important to the plant
Answer:
The root is a very important part of the plant that has two main functions: To hold the plant to the ground and to absorb water and mineral salts from the soil.
Explanation:
The root is the organ of the plant that is frequently located underground, since it presents positive geotropism. The roots penetrate several layers of the soil, bind the earth with their branches and adhere by means of absorbent hairs to the soil particles, fixing the plant and ensuring its stability, that is, they prevent it from being dragged by the wind, and provide the vegetable of a base for its correct growth. The root is the organ specialized in absorbing water and minerals (raw sap) from the soil, mainly through the absorbent hairs, and conducting it towards the stem. The water circulates through the stem until it reaches the leaves. Small tubes called capillaries are involved in this process.
Given the following three mRNA sequences, 2 code for the same protein. Which two?
#1. AGU UUA GCA ACG AGA UCA
#2 UCG CUA GCG ACC AGU UCA
#3 AGC CUC GCC ACU CGU AGU
Answer:
#2 & #3
Explanation:
both have the same amino acids. like leucine
Knowing that more than one codon codes for the same amino acid during protein building, we can affirm that sequences #2 and #3 code for the same protein.
How does translation occur?
During protein synthesis, the ribosome reads mRNA molecules from the 5' to 3' extremes.
While doing it, tRNA recognizes the codons of the molecules and adds the correct amino acids.
Codons are short sequences of three nucleotides that code for one amino acid.
So the sequence of codons determines the sequence of amino acids in the building protein.
There are 64 possible codons,
The start codon AUG is the most common sequence used by eukaryotic cells and placed near the 5' extreme of the molecule. The end codons are UAA, UAG, UGA. They indicate where to stop protein synthesis. The remaining codons code for one amino acid in the protein. Since there are only 20 amino acids in nature, more than one codon codes for the same amino acid.Knowing this, we can build the protein by reading the mRNA sequences.
#1. AGU UUA GCA ACG AGA UCA
Met Leu Ala Thr Arg Ser
#2 UCG CUA GCG ACC AGU UCA
Ser Leu Ala Thr Ser Ser
#3 AGC CUC GCC ACU CGU AGU
Ser Leu Ala Thr Arg Ser
Sequences 2 and 3 code for the same protein.
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Which substances are acids? Check all that apply.
(1)AgOH
(2)HF
(3)NiOOH
(4)NH4OH
(5)HMnO4
(6)Zn(OH)2
Answer:
Numbers 5, and I think 2 the rest are bases
Explanation: * Remember H+ is acids and OH- is base :)
Answer:
(1),(2),(5),(6)
Explanation:
What would happen to a plant if many of its cells are plasmolysed?
Answer:
pressure decreases to the point where the protoplasm of the cell peels away from the cell wall, leaving gaps between the cell wall and the membrane and making the plant cell shrink and crumple.
Which internal structures of animals are specifically adapted to use
contraction to cause movement
A.Blood cells
B.Bones
C.Glands
D.Muscles
Answer:
D. muscles
Explanation:
They are adapted to contraction due the elastic cella
internal structures of animals are specifically adapted to use contraction to cause movement muscle. They are adapted to contraction due the elastic cell
what are the types of muscle ?Three major types of muscles are skeletal muscle, smooth muscle and cardiac muscle.
Skeletal muscle, attached to bones, responsible for skeletal movements. where the peripheral portion of the central nervous system (CNS) controls the skeletal muscles.
The unit is the muscle fiber with many nuclei, these are either striated and each acts independently of neighboring muscle fibers.
Smooth muscle located in the walls of the hollow internal organs like blood vessels, the gastrointestinal tract, bladder, and uterus which is under control of the autonomic nervous system.
Cardiac muscle present in the heart wall under control of the autonomic nervous system, it has one central nucleus, like smooth muscle, is striated, like skeletal muscle, rectangular in shape. The contraction of cardiac muscle is involuntary, strong, and rhythmical.
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How do hormones affect gene activity?
Answer:
makes them more active.
Explanation:
Answer:
makes them more active.
Explanation:
Help please
Dkskskekdndkxien
Answer:
Yes,cloning should be acceptable because different types of extinct animals and plants can rejuvenated and also organisms with superior survival skills can be reproduced easily.
