Answer:
"In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure"
Explanation: I just looked it up-
Biological diversity, or biodiversity, has become a topic of great concern among conservationists. Biodiversity is often used by scientists and policy makers to help determine the health of ecosystems. (a) Describe TWO characteristics shared by ecosystems that have high biodiversity. (b) Identify TWO specific human activities that result in a loss of biodiversity, and explain how each activity lowers biodiversity. (c) For each human activity you discussed in (b), propose a practical strategy (other than simply banning the activity) to reduce the loss of biodiversity. (d) Describe ONE naturally occurring factor that could lead to a loss of biodiversity. (e) Describe TWO ecological benefits that greater biodiversity provides.
Answer:
Large number of species and abundant resources.
Explanation:
Large number of species and abundant resources are the two characteristics shared by ecosystems that have high biodiversity. Habitat loss and pollution are the two specific human activities that result in a loss of biodiversity. Habitat loss occur when the human removed all the trees and vegetation in order to made the land for cultivation of crops or building houses. Pollution is the main cause that leads to loss of biodiversity. Human activities release gases which pollute the environment and leads to loss of biodiversity. Avoid activities that causes pollution and used of barren lands for cultivation and infrastructure. Climate change is naturally occurring factor that could lead to a loss of biodiversity. Biodiversity boosts ecosystem productivity and natural sustainability.
black worms are detritivores. what does that mean?
Answer:
detritivores is a animal who feeds on dead organic things such as plants.
how is a tree a biotic factor
Answer:
You could say the dead tree is now an abiotic factor because biotic factors refer to living things. The tree is no longer living, thus it is not a biotic factor. Alternatively, you could argue that the tree was once living and biotic factors are things that are living or were once living. Thus, the tree is a biotic factor.
Please help me with these science questions about ecology!
Circle the letter of the choice that best completes the statement or answers the question.
11. Energy that is lost at each trophic level of an ecosystern is replenished by
a. heat.
b. nutrients.
sunlight
c. sunlight
d. organisms.
12. Besides energy, what moves through the organisms at each trophic level of an ecosystem?
a. organisms
b. nutrients
c sunlight
d. cycles
13. Evaporation and condensation a part of the
a. carbon cycle.
b. nitrogen cycle.
c phosphorus cycle.
d. water cycle.
14. Plants lose water to the air through
a. condensation
b. photosynthesis.
c. Their roots.
d. evaporation
15. Animals lose water when they
a. breathe in
b. urinate.
c breathe out
d. both b and c.
16. The major process by which water in the atmosphere is returned to the earth is
a. precipitation
b. evaporation
c. photosynthesis.
d. decomposition.
17. Autotrophs and heterotrophs use carbon-containing molecules for energy and for
a photosynthesis.
b. growth.
c decomposition
d. both a and b.
18. What do plants use in photosynthesis to make carbon-containing molecules?
a carbon dioxide
b. carbohydrates
c. fertilizer
d. oxygen
19. Heterotrophs get carbon-containing molecules by
a. making the molecules themselves.
b. feeding on other organisms.
c decaying.
d. growing.
20. When decomposers break down the carbon-containing molecules in dead organisms,
a. the dead organisms are converted to coal.
b. oxygen is released.
c carbon dioxide is released.
d. carbon dioxide is converted to energy-rich
carbon-containing molecules.
Answer:
11 is A. 12 B. 13 A. 14.D 15. C 16. D
Which of the following defines the wavelength of a wave?
A.
the distance between peaks of a wave
B.
the loudness of waves that travel through the air
C.
the height of a wave between peak and trough
D.
the speed that a wave is passed from particle to particle
what is a cell mention any one function of it
Answer:
A cell is the structural and functional unit of life. Each cell contains smaller organelles that perform various functions such as metabolism, transportation and secretion of substances. ... The various structures and organelles in a cell float in a liquid called the cytoplasm
Use scientific language to describe two ways that embryos and fossils are different.
Answer:Fossils are the remails of an organism and the embryos are a stage of developing a multicellular organism.
Explanation:
What color face do you think the cloned sheep will have?
Answer:
it would depend on the mammary gland cell
Explanation:
Dolly's white face was one of the first signs that she was a clone because if she was genetically related to her surrogate mother, she would have had a black face. Because Dolly's DNA came from a mammary gland cell, she was named after the country singer Dolly Parton.
All of the following are threats to biodiversity EXCEPT
a. habitat destruction.
b. gene pool diversity.
C. pollution.
d. exotic species.
Answer:
B. gene pool diversity
Explanation:
hope this helps
Mistletoe contains root-like structures that penetrate the branches of oak trees, where they absorb water and minerals from the oak tree. This is an example of --
A- predation
B- competition
C- parasitism
D- commensalism
Which of the following is an accurate description of a neutral potassium
(K) atom?
19 particles in the nucleus and 39 particles outside the nucleus
39 particles in the nucleus and 19 particles outside the nucleus
19 particles in the nucleus and 20 particles outside the nucleus
39 particles in the nucleus and NO particles outside the nucleus
Answer:
39 particles in the nucleus and 19 particles outside the nucleus
Explanation:
In the atom of every element, there are three subatomic particles namely; proton, neutron and electron that constitutes the behavior of such an atom. The PROTON and NEUTRON are located inside the nucleus while the ELECTRON is located outside of the nucleus.
For instance, in a neutral pottasium (K) atom i.e. uncharged, there are 19 protons and 19 electrons but 20 neutrons. Note that, mass no. = Proton no. + Neutron no. Based on the explanation of the location of each subatomic particle, it means there are 39 particles in the nucleus (20 neutrons and 19 protons) and 19 particles (electrons) outside the nucleus.
Answer:
39 particles in the nucleus and 19 particles outside the nucleus
Explanation:
In the atom of every element, there are three subatomic particles namely; proton, neutron and electron that constitutes the behavior of such an atom. The PROTON and NEUTRON are located inside the nucleus while the ELECTRON is located outside of the nucleus.
For instance, in a neutral pottasium (K) atom i.e. uncharged, there are 19 protons and 19 electrons but 20 neutrons. Note that, mass no. = Proton no. + Neutron no. Based on the explanation of the location of each subatomic particle, it means there are 39 particles in the nucleus (20 neutrons and 19 protons) and 19 particles (electrons) outside the nucleus.
Question 13: I need help please
Answer:
A
Explanation:
How does an inhaler work?
Answer:It works by relaxing the muscles of the airways into the lungs, which makes it easier to breathe. Salbutamol comes in an inhaler (puffer). Salbutamol inhalers are usually blue. Salbutamol is sometimes given as tablets, capsules or syrup for people who cannot use an inhaler very well.
Explanation:
identical cells are produced at the end of mitosis
In rabbits, black fur (B) is dominant to brown fur (b). Consider the following cross between two rabbits.
Bb x Bb
B
b
B
1
2
b
3
4
Refer to the illustration above. The device shown, which is used to determine the probable outcome of genetic crosses, is called a
Answer:
Punnet square
Explanation:
Cladistic diagrams, or cladograms, can be used to show evolutionary relationships. An example of a cladistic diagram appears below.
According to the diagram, which of the following animals is most closely related to crocodiles?
A.
rodents
B.
amphibians
C.
birds
D.
primates
Blood type is determined by multiple alleles and can be used to determine the possible parents of an offspring. In this case, the mother has blood type B, and her child has blood type A. There are two possible fathers for this child. The phenotype of one man is type O, and the phenotype of the other man is type AB. What is the genotype of the man who is the father?
A. IAIB
B. IAio
C. ioio
D. IBio
Answer:
A. IAIB
Explanation:
Since the child has blood type A and the mother is B, one man having blood type O makes it so that the child cannot be blood type A.
IAIB is the genotype of the man who is the father.
What are Genotypes?The type of variant present at a specific locus (i.e., region) in the genome is scored by what is known as a genotype. Symbols can be used to symbolize it.
For illustration, BB, Bb, and bb could be used to denote a certain gene variant. The actual DNA sequence, such as CC, CT, or TT, can also serve as a representation of a genotype.
In a single experiment, the genotypes at millions of sites in a genome can be determined using DNA sequencing and other techniques. Some genetics influence an individual's phenotype, or observable traits.
Therefore, IAIB is the genotype of the man who is the father.
To learn more about Genotype, refer to the link:
https://brainly.com/question/12116830
#SPJ6
What would happen to the bison population if a
drought caused many of the grasses in the prairie
ecosystem to die?
O A. The bison population would decrease
quickly
O B. The bison population would not change in
response to a change in the amount of
grasses.
C. The bison population would increase
quickly.
D. There is not enough information to form a
hypothesis about a change in the bison
population in response to a change in the
amount of grasses.
Which is a property of ultraviolet C (UVC)?
a. has the longest wavelength
b. is the least reactive
c. is the least absorbed by the stratosphere
d. is the most reflected by Earth's surface
e has the most energy
Answer:
e
Explanation:
ultraviolet rays are most energetic than visible
It is widely accepted that living organisms are made of cells. This belief is confirmed by many years of scientific observation that has been supported by large amounts of data. Which of the following statements is included in the modern Cell Theory? *
I and II
II and IV
I and III
I and IV
Answer:
I and IV
Explanation:
I am not 100% sure, but I think it is 1 and 4.
Hope this helps and tell me if I was right, thank you :) !!
Answer:
The last one, I'm pretty sure
Explanation:
Why are phytoplankton important in the carbon cycle?
Answer:
Microscopic marine phytoplankton play a critical role in regulating todays carbon cycle yet not enough is known about the process. These tiny organisms consume carbon dioxide from atmosphere and move it to marine sediments in deep ocean. And this process is also known as biological pump.
Explanation:
plz give me brainliest if you like this answer
How do fungi play roles in the death and the life that happens in a
forest?
Answer:
They decompose dead organisms. Also, some fungi helps other organisms obtain nutrients that the organism cannot obtain
Explanation:
if you have 6% guanine how much of the other bases do you have? please hurry
100% total of all 4 bases and Guanine and Cytosine need to have 1:1 ratio and Adenine and Thymine need to have 1:1 ratio (This is the Chargaff's rules I think)
6% Guanine must also mean 6% Cytosine
6 + 6 = 12 100 - 12 = 88 88/2 = 44
So 44% of Adenine and 44% of Thymine
Which of the following is a SLOW process that changes Earths surface?
A. Flooding
B. Earthquake
C. Wind erosion
D. Volcanic eruption
Answer:
I would say C:wind erosion
Explanation:
can I have brainliest
Describe what you believe a chemical rxn is ? Use the lab to describe it in 3 or more sentences.
Answer:
Please find the description of a chemical reaction below.
Explanation:
A chemical reaction is a type of reaction involving two or more substances in which the atoms or molecules that constitutes each substance are rearranged. In other words, a chemical reaction alters the chemical nature of the substances involved.
In a chemical reaction, substances called REACTANTS are changes or transformed into other substances called PRODUCTS. In a laboratory, chemical reactions are carried out when two or more substances are mixed together to form new products.
Discuss 2 pros and 2 cons of selective breeding associated with different factors (social,
economic, environmental, ethical)
Answer/Explanation:
Pros
1 ) Qualities that benefit the species can be chosen to be passed on to the offspring.
2 ) When more of the animals (humans included) will have less competition if their mate is predetermined.
Cons
1 ) If certain traits are preferred and passed on selectively, the genetic diversity of the group will suffer.
2 ) We were made from Darwinian evolution, a natural evolution, so is it right to take that into our own hands and play god.
How can scientists know what happened to Earth's climate hundreds of thousands of years ago?
Answer:
But if scientists want to know what Earth's climate was like hundreds of thousands to millions of years ago, they study sediment cores and ice cores. Sediment cores come from the bottoms of lakes or the ocean floor. Ice cores are drilled from deep — sometimes miles — below the surface of the ice in places like Antarctica.
The diagram shows the movement of water through a
plant.
Whích two terms or phrases describe the process shown?
A. Limp guard cells
B. Open stomata
O C. Transpiration
O D. Low turgor pressure
Which type of process occurred in the ecosystem that was affected by the 1988 fires in Yellowstone Park, which destroyed most of the vegetation but left the soil intact?
Answer: secondary succession
Explanation:
Scientists are concerned that this technology may backfire. Explain what they mean.
Answer: scientist think that if warnings are given earlier people might choose to flee the area rather than seek shelter as a result roadways are blocked and more people will be exposed
Explanation: this is exact answer please rewrite this in your own words