Answer:
Prophase I
Explanation:
When chromatids "cross over," homologous chromosomes trade pieces of genetic material, resulting in novel combinations of alleles, though the same genes are still present. Crossing over occurs during prophase I of meiosis before tetrads are aligned along the equator in metaphase I.
By meiosis II, only sister chromatids remain and homologous chromosomes have been moved to separate cells. Recall that the point of crossing over is to increase genetic diversity. If crossing over did not occur until sometime during meiosis II, sister chromatids, which are identical, would be exchanging alleles. Since these chromatids are identical, this swap of material would not actually change the alleles of the chromatids.
Hope this helps out!
how long has earth been in it’s current era
Answer: Such constant change has characterized Earth since its beginning some 4.5 billion years ago. From the outset, heat and gravity shaped the evolution of the planet. These forces were gradually joined by the global effects of the emergence of life.
Explanation:
Mass measures the amount of
in a substance or an
object
a
matter
b gravity
space
d
vapour
Answer:
A. matter
Explanation:
Answer:
A
Explanation:
Mass is the measure of matter.
You can take a baseball to the moon and it'll have a different weight but the mass will be the same.
In a cell membrane, which option below best describes how proteins help the cell
membrane perform its function?A.Protein helps the cell remove its wastes.
B.Proteins help water to not get inside the cell.
C.Protein allows materials dissolved in water to enter or leave the cell.
D.Protein allows certain materials to enter or leave the cell.
What is the name of the reaction when you burn a fuel?
Answer:
When fuels burn they release heat energy and light energy to the surroundings in exothermic reactions known as combustion reactions
Explanation:
your welcome :)
What is the name for all physical materials in the universe
Answer:
.
Explanation:
Answer:
I think the answer is matter.
Explanation:
hope this helped bye
What factors contribute to past and present changes in California's sea otter population?
Answer:
White shark bites, parasites, food availability, habitat degradation are among some of the contributing factors threatening the recovery of the species. The greatest threat to a sea otter is the oil spills.
Hope this helps!
Extra - Fun fact - Sea otters play a vital role in the health and stability of the nearshore marine ecosystem as a keystone species.
Answer:
White shark bites, parasites, food availability, habitat degradation are among some of the contributing factors threatening the recovery of the species. The greatest threat to a sea otter is the oil spills.
Explanation:
please help as soon as possible
DUE TOMORROW
Answer:
D. loose layers bond together over time.
Explanation:
The sediment in sedimentary rocks are formed when weather and erosion break down the rock into loose material.
P waves move can travel through liquid.
true or false
(TEST HELP!!!)
Answer:
The answer to your question is true
How does volcanic ash in Earth’s atmosphere affect solar radiation?
Answer:
A new study is shown that volcanic ash reflects sunlight or solar radiation months after the volcanic eruption. The volcanic ash consists of minerals, fragments of rocks, volcanic glass which is larger than 2mm. Those tiny particles reflect solar radiation back to space preventing the radiation to heat the Earth's atmosphere below.
Hope it helps
Which is true about scientific inquiry?
A. It is testable.
B. It poses questions about astrology
O C. It can be done only by one person.
D. It is resistant to change and not open to criticism.
Answer:
A. it is testable
Explanation:
hope it helps
someone please help!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
the answer is A
Explanation:
What are atoms? How are they like building blocks?
Answer: An atom is the smallest unit of ordinary matter that forms a chemical element, they are like building blocks because they form together to make up everything on this earth.
Explanation:
i done know my way around this here terrain
Darwin noted that ___________communities are often missing plants and animals typically found on continents.
Answer:
dry
Explanation:
because dry communities dony have much plant and wildlife because of the shortage of water
Darwin noted that island communities are often missing plants and animals typically found on continents.
What theory did Darwin propose?Darwin proposed the theory of natural selection. It is the evolutionary change that is significantly based on the differential reproductive success of individuals within a species. He observed this process of natural selection in the Galapagos islands.
Darwin observed that the plants and animals of the Galapagos Islands were the same as those on islands off the coast of Africa with similar environments. Natural selection can cause the spread of an advantageous adaptation throughout a population.
Therefore, Darwin noted that island communities are often missing plants and animals typically found on continents.
To learn more about Natural selection, refer to the link:
https://brainly.com/question/23929271
#SPJ6
The layer of the atmosphere where many airplanes fly to avoid thunderstorms and other turbulence is called A. troposhere B. stratosphere C. mesosphere D. thermosphere
Answer:
B. Stratosphere
Select all of the questions that can be tested with a scientific investigation.
Answer:
A.
E.
G.
I THINK B TOO
Explanation:
what does the organism's phenotype describe.
Answer:
hope it helps....
Explanation:
Phenotype, all the observable characteristics of an organism that result from the interaction of its genotype (total genetic inheritance) with the environment. Examples of observable characteristics include behaviour, biochemical properties, colour, shape, and size.
Answer:
i am stuck on this one toooooooo
Explanation:
If a compound had 7 neutrons and 9 elections and it loses one electron's how many protons does it have?
A.)8
B.)7
C.)6
D.)9
Answer:
answer is 7
hope it helps
plz mark as brainliest
this time u have to finish my sentence. waddle waddle to the very next day got any_________ !!! will mark brainlest for the correct answer 20 points HAVE FUN
Answer:
Grapes
Explanation:
I love the duck song
pls give me brainlest ;)
What is purpose of life
Answer:
to live
Explanation:
to make the most of it
Answer:
to enjoy it while you have it
Why aren’t there many fossil jellyfish?
Answer:
Jellyfish are invertebrates, so they do not have the hard body parts that favor fossilization
There aren't many jellyfish fossils because they are made of soft tissues and they don't have and bones.
I hope this helps!
QUESTION 3: What conditions may occur when a population is inexponential growth?
A. birth rate is greater than death rate
B. birth rate is less than death rate
C. immigration rate is greater than emigration rate
D. immigration rate is less than emigration rate
Answer:
A. birth rate is greater than death rate
Explanation:
Hope this helps!
Answer:
a
Explanation:
The fish in an aquarium swim to the top when the light is turned on. Develop a hypothesis to explain this behavior and design an experiment to test the hypothesis.
Select the term that is suggested by the figure. Then state whether the term is an undefined term or a defined term. The image suggests the term line segment, ray, or point , which is defined or undefined term.
The above image shows the defined term and in image there is a ray, line segment and point.What is Ray, line segment and point?
1:-Ray is part of line and it is combination of line and line segment that has a infinitely extending and one end end is terminating end and another end is non-terminating. Length of ray can't be measured.
2:- A line segment is a part of line which have two end points. In above figure M and L is a two point so ML is a line segment. The measurement of line segment is called length. It has a fixed lengthy which can easily.
3:- A point is dot on a piece of paper it doesn't have length width or any other dimension. It's helps to find the position or location in a plane. In above figure M and L is consider as a point.What is Ray, line segment and point?
What is ray?Ray is part of line and it is combination of line and line segment that has a infinitely extending and one end end is terminating end and another end is non-terminating. Length of ray can't be measured. A line segment is a part of line which have two end points. In above figure M and L is a two point so ML is a line segment. The measurement of line segment is called length. It has a fixed lengthy which can easily. Point A point is dot on a piece of paper it doesn't have length width or any other dimension. It's helps to find the position or location in a plane. In above figure M and L is consider as a point.
Learn more about ray, segment, and point here: https://brainly.com/question/24542814?
#SPJ5
The pancreas releases _________ to buffer the pH of the stomach juices.
A. A strong base to counter the strong acid.
B. HCl.
C. NaHCO3.
D. Pepsin.
E. ATPase-activating protein.
What is the hypothesis
Answer: the hypothesis is the fact she thinks extra fertilizer getting into the ocean is caused by build up sargassum I’m assuming
Explanation:
Hypothesis is an answer to the explanation
Everything in the universe is composed of energy and matter. Which one of these examples does not represent matter? * An atom of gold. A lake filled with water. The air in the atmosphere. Heat from the sun.
What niche do lions fill in their habitat?
Why is it necessary that only one variable be changed in an experiment, and that all other variables remain constant? Need help ASAP!
Answer:
It is necessary to only change one variable when experimenting, because then you see what happens when that one specific variable changes. If you changed two at one time and your experiment turned out different, you wouldn't know which variable caused the change.
hope this helps
In an experiment, the change only in one variable possible, because it shows what happens when one specific variable changes.
If both the variables are changed at a time we cannot know which variables cause changes.
What are the types of variables in experiment ?A variable is defined as any property, number, or number of items that can be counted or measured.
An independent variable is a singular characteristic, Age is an example of an independent variable.
A dependent variable relies on other variables. For example a grade on an exam is a dependent variable mainly depend on Independent variables.
An intervening variable or mediator variable used to explain a cause or connection between dependent and independent variables.
Control variable remain constant and no effect on other variables. It is used to prevent bias in an experiment.
For more details regarding variables, here
brainly.com/question/17344045
#SPJ2
What are the top five things you should know about how you learn?
“how to ace this class”
(the subject is unnecessary)
Answer:
1. don’t overwork your memory
2. take care of your body
3. practice makes better
4.type of practice matters
5. what you already know can help you
Explanation:
suggest why single-celled plant organisms do not have contractile vacuoles
Answer:
Single celled organism do not contactile vacuoles
Explanation:
The point of the contractile vacuole is to pump water out of the cell through a process called osmoregulation, the regulation of osmotic pressure.
