In the 1980s, Stephen Jay Gould identified two types of extinctions that each had different evolutionary consequences. What are these extinctions called?

Answer:

This question lacks options, options are: A) A visible nuclear envelope B) Separated sister chromatids at each pole of the cell C) Tetrads lined up at the center of the cell D) A synaptonemal complex E) A cleavage furrow. The correct answer is C.

Explanation:

During Metaphase I, the chromosomes line up at the midpoint or equator between the poles of the cell and are found at their thickest and shortest structure, that is, the tetrads line up at the equator of the cell. They are identified as two double longitudinal sister chromatids. In animals and plants, the chromatids are connected (at their centromeres) to the fusiform apparatus, which has formed between the two centrioles located at the poles of the cell. In many plants, the centrioles are absent. However, the spindle is still present and the plant chromosomes are attached similarly to the microtubule fibers of the spindle.

Answer:

I do agree

Explanation:

As a personal opinion, I do agree with this statement. Citizens of developing countries use these rain forests for many reasons. One of which is for survival they cut down and use what they need in order to gather the resources that they need and build their habitats. This goes slowly destroying the rainforests. The other reason is that these citizens many times sell the rights to the rainforest land to mining companies that ultimately destroy the rainforest for its resources. The only way to prevent both of these from happening is by paying these developing countries to protect the rainforest instead of profiting from it.

Answer:

talk about respect and communicate

Explanation:

if you dont want your friend doing thoes stuff talk to them

Answer:

Cell body

Explanation:

Answer:

expected or c on edge 2021

Explanation:

Notice that the predicted percentages and laboratory percentages are not the same. These differences most likely result from "expected randomness."

Answer     According to its developer, the YLE is a comprehensive assessment tool which makes accurate and fair assessment and has a positive impact on a child's future.

Explanation:

Answer:

It's A

Explanation:

I got it wrong on usa testprep

Answer/ Explanation:

B. Magma rises from the surface of Earth, causing lava beds to form.

From below or decreasing downward force weigh from above. During uplift, land, as well as the sea floor, rises. All this movement can cause rocks that were once underground to be brought up to the Earth's surface. This process is called uplift.

Answer:

570 m/s

Explanation:

The speed of sound is a measure of how fast sound travels through a medium. The speed of sound through various media varies. Sound travels fastest through solids and slowest through gases for example air.

The temperature of a medium affects the speed of sound through that medium. The higher the temperature, the faster sound travels through the medium. This is because, as the temperature of the medium increases, the particles of the medium vibrates faster and faster, thus sound waves are able to be propagated faster through that medium.

From the information provided in the attachment, the speed of sound through the boulder increase by 2 m/s for every 5°C rise in temperature. Therefore, the speed of sound through the boulder when it reaches 20°C will be 570 m/s

Answer: 1. Disaccharide

2. two monosaccharides, galactose and glucose

3. the role of lactase is to catalyse the hydrolysis of the disaccharide lactose to yield the monosaccharides galactose and glucose

Explanation:

Lactose is a disaccharide, consisting of two monosaccharide units joined by a beta 1–>4 glycoside link

Lactase cleaves the glycoside link, giving two monosaccharides, galactose and glucose

Answer:

I so I am also a bit confused, but I hope this could answer your question!

Explanation:

The bacteria possess a cell wall composed of peptidoglycan molecule formed by the amino acids called murine.  The bacterial cell wall helps in the survival of the bacteria in some extreme condition like when placed in a hypotonic solution.

The hypotonic solution is formed when it has low solute concentration and high water amount when compared. When the bacterial cell will be placed in hypotonic solution then the water will move inside the cell down the concentration gradient as a result of which the bacterial cell will swell but will not burst.

This happens as the cell wall contains expansin protein which allows the cell wall to expand and provides rigidity to the cell.

Answer:

1. Photoautotroph

2.Protozoa

3. Passive transport uses no energy and molecules move from high to low concentrations.  Active transport uses energy to move from low to high concentrations.

4. Synergism

Explanation:

Good luck on your assignment

Answer:

Option (C) is the correct answer.

Explanation:

Taxonomy: It is a process of classifying, organizing, and naming things such as plants, animals, microorganisms, and other living things.

Carolus Linnaeus a father of taxonomy,

Taxonomy utilizes hierarchical arrangement.

There are eight taxonomic categories:

Domain

Kingdom.

Phylum.

class.

Order.

family.

genus

Species.

Answer:

A. soreness indicates the muscles are growing

D. micro tears signal the muscles to grow

Explanation:

Muscle soreness is one of the indication of muscles are growing as while doing exercise, some inflammation takes place to get bigger and stronger muscles. Some pain signals are sent by the body to make it feel soreness after intense exercise.

Micro tears signal also indicates muscles growth as after intense workout, a certain amount of soreness is felt by our body and these micro tear signals to repair and replenish the muscle tissue that eventually accumulate to form muscle mass.

Hence, the correct answers are: "A. and D.".

Answer:

so I can get on the phone with my mom and I are going to the house and get back to you on that one and the other is a good time to call you today but I will be there at his house and he will be there at his house and he said he

Answer:

It's A

Explanation:

Just like the corals have genetic mutations to adapt to their environment so do the rabbits change their genetic characteristics to make sure the species continue it's lineage by evolving and growing their feet so they can be faster and not sink in the snow, becoming harder preys to catch, otherwise, if their paws were smaller, they would be slower and, therefor, an easy catch for the wolves, probably becoming extinct after awhile.

The statement that justifies how the rabbit population changes over time is sea coral would make immediate adaptations through genetic mutations to adjust to the changes in the environment. So, the correct option is A.

Adaptation is the process by which a species becomes fitted to its environment; it is the result of natural selection's acting upon heritable changes.

Rabbits have to change their genetic characteristics same as the coral have genetic mutations to adapt to their environment and to make sure the species continue its downstream by evolving and growing their feet, so they can run faster in the snow and successfully escape from predators. If rabbits are not evolved with an environment that does not favor them, they are surely eliminated from nature.

Therefore, the statement that justifies how the rabbit population changes over time are sea coral would make immediate adaptations through genetic mutations to adjust to the changes in the environment.

To learn more about Evolution, refer to the link:

https://brainly.com/question/1144962

Answer:

low, sympathetic, an increase, decrease, pressure  

Explanation:

Angiotensin II is a peptide hormone whose primary function is to increase blood pressure by different mechanisms of action including vasoconstriction and sympathetic nervous stimulation. This hormone is produced by the action of the enzyme angiotensin-converting enzyme (ACE). Angiotensin II may act on the central nervous system (CNS) to increase antidiuretic hormone (ADH) levels, and on the arterial smooth muscle cells to trigger vasoconstriction. Angiotensin II induces the release of ADH and aldosterone hormones in order to increase blood pressure. When blood pressure returns to normal values, circulating Angiotensin II levels are decreased by negative feedback.

Answer:

c

Explanation:

act as carrier molecules for various solutes

Answer:

The frequency of the genotype MN, F(MN) = 0.4

Explanation:        

Due to technical problems, you will find the complete answer and explanation in the attached files.    

A contractile vacuole removing excess water is the correct answer.

Diffusion is defined as the movement of particles from a region of high concentration to a region of lower concentration. Diffusion occurs in both liquids and gases which is an important process for living organisms.

In contractile vacuole, water moves from higher concentration region to lower so we can conclude that a contractile vacuole removing excess water is the correct answer.

Learn more about diffusion here: https://brainly.com/question/94094

Fresh water lakes are used to help store fresh water for flood control, irrigation, hydroelectric power and recreation.

Desalination is the process by which excess dissolved mineral salt is removed from barkish water to make it suitable for human use and agriculture.

According to the options:-

Learn more about desalination here: brainly.com/question/934626

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Answer:

i think it is c

Explanation:

Answer:

Earth's rotation and the gravitational pull of the sun and moon create tides on our planet. Because the sun is so much larger than the moon (27 million times more masssive), it has a much bigger graviational pull on Earth.

Answer:

Crust- ranged from 6km to70km thick .

mantle- convection here leads to earthquakes.

Core -has a liquid and soild layer

Moho barrier- separates the crust and mantle.

Explanation:

HOPE this helps

The layers of the earth are differentiated based on their composition and occurrence. The crust is 6 -70 km thick, and the mantle is where the convection occurs. Thus, the matches are 1. c, 2. d, 3. b, and 4. a.

Earth has many different layers based on their arrangements and occurrences. The crust is the first layer of the earth where humans and other organisms live and ranges from 6 -70 km thick. It is followed by the Moho barrier.

The Moho barrier is the layer that separates the crust from the mantle and is followed by the mantle layer where the convection in the tectonic plates leads to earthquakes.

The deepest and the innermost layer is the core where the solid and liquid hot gases are found at very high temperatures. It is very hot and composed of iron and nickel.

Therefore, the matches are 1. c, 2. d, 3. b, and 4. a.

Learn more about the layers of the earth here:

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Answer:

Introduction

Cellular respiration is one of the most elegant, majestic, and fascinating metabolic pathways on earth. At the same time, it’s also one of the most complicated. When I learned about it for the first time, I felt like I had tripped and fallen into a can of organic-chemistry-flavored alphabet soup!

Luckily, cellular respiration is not so scary once you get to know it. Let's start by looking at cellular respiration at a high level, walking through the four major stages and tracing how they connect up to one another.

Steps of cellular respiration

Overview of the steps of cellular respiration.

1. Glycolysis. Six-carbon glucose is converted into two pyruvates (three carbons each). ATP and NADH are made. These reactions take place in the cytosol.

2. Pyruvate oxidation. Pyruvate travels into the mitochondrial matrix and is converted to a two-carbon molecule bound to coenzyme A, called acetyl CoA. Carbon dioxide is released and NADH is made.

3. Citric acid cycle. The acetyl CoA combines with a four-carbon molecule and goes through a cycle of reactions, ultimately regenerating the four-carbon starting molecule. ATP (or, in some cases, GTP), NADH, and FADH_2 are made, and carbon dioxide is released. These reactions take place in the mitochondrial matrix.

4. Oxidative phosphorylation. The NADH and FADH_2 produced in other steps deposit their electrons in the electron transport chain in the inner mitochondrial membrane. As electrons move down the chain, energy is released and used to pump protons out of the matrix and into the intermembrane space, forming a gradient. The protons flow back into the matrix through an enzyme called ATP synthase, making ATP. At the end of the electron transport chain, oxygen accepts electrons and takes up protons to form water.

Overview of the steps of cellular respiration.

Glycolysis. Six-carbon glucose is converted into two pyruvates (three carbons each). ATP and NADH are made. These reactions take place in the cytosol.

Pyruvate oxidation. Pyruvate travels into the mitochondrial matrix and is converted to a two-carbon molecule bound to coenzyme A, called acetyl CoA. Carbon dioxide is released and NADH is made.

Citric acid cycle. The acetyl CoA combines with a four-carbon molecule and goes through a cycle of reactions, ultimately regenerating the four-carbon starting molecule. ATP (or, in some cases, GTP), NADH, and FADH_2 are made, and carbon dioxide is released. These reactions take place in the mitochondrial matrix.

Oxidative phosphorylation. The NADH and FADH_2 produced in other steps deposit their electrons in the electron transport chain in the inner mitochondrial membrane. As electrons move down the chain, energy is released and used to pump protons out of the matrix and into the intermembrane space, forming a gradient. The protons flow back into the matrix through an enzyme called ATP synthase, making ATP. At the end of the electron transport chain, oxygen accepts electrons and takes up protons to form water.

During cellular respiration, a glucose molecule is gradually broken down into carbon dioxide and water. Along the way, some ATP is produced directly in the reactions that transform glucose. Much more ATP, however, is produced later in a process called oxidative phosphorylation. Oxidative phosphorylation is powered by the movement of electrons through the electron transport chain, a series of proteins embedded in the inner membrane of the mitochondrion.

These electrons come originally from glucose and are shuttled to the electron transport chain by electron carriers \text{NAD}^+NAD

+

start text, N, A, D, end text, start superscript, plus, end superscript and \text{FAD}FADstart text, F, A, D, end text, which become \text{NADH}NADHstart text, N, A, D, H, end text and \text{FADH}_2FADH

2

start text, F, A, D, H, end text, start subscript, 2, end subscript when they gain electrons. To be clear, this is what's happening in the diagram above when it says ++plus \text {NADH}NADHstart text, N, A, D, H, end text or ++plus \text{FADH}_2FADH

2

start text, F, A, D, H, end text, start subscript, 2, end subscript. The molecule isn't appearing from scratch, it's just being converted to its electron-carrying form:

\text {NAD}^+NAD

+

start text, N, A, D, end text, start superscript, plus, end superscript ++plus 2 e^-2e

−

2, e, start superscript, minus, end superscript ++plus 2 \text H^+2H

+

2, start text, H, end text, start superscript, plus, end superscript \rightarrow→right arrow \text {NADH}NADHstart text, N, A, D, H, end text ++plus \text H^+H

+

start text, H, end text, start superscript, plus, end superscript

\text {FAD}FADstart text, F, A, D, end text ++plus 2e^-2e

−

2, e, start superscript, minus, end superscript ++plus 2 \text H^+2H

+

2, start text, H, end text, start superscript, plus, end superscript \rightarrow→right arrow \text {FADH}_2FADH

2

Explanation:

Some diabetics neglect to take insulin doses specified for them throughout the day or follow some wrong practices that reduce its effectiveness, which causes a decline in its role in processing glucose to produce the energy needed to perform daily activities, which leads to its deposition in the bloodstream.

Answer:

true

Explanation:

the gratational pole attrachts it

Answer:

difference between a hurricane and a tornado is there needs to be warm ocean water and moist, humid air in the region (hurricane)

The warm air rises through the colder air, causing an updraft. (in tornado)

Answer:

c i think and thats 15 points

c is the answer. i say this because the oxpecker is eating off of the zebra.