which two types of structures make up the earthworm's heart

Answers

Answer 1

Answer:

organ systems and specialized cells

Explanation:

Answer 2

Answer:

The correct answer is specialized cells and tissues

Explanation:

I just got it correct on my quiz. Good luck!


Related Questions

What is the function of enzymes in biological systems?

Answers

Answer:

Enzymes help speed up chemical reactions in the human body. They bind to molecules and alter them in specific ways. They are essential for respiration, digesting food, muscle and nerve function, among thousands of other roles.

Explanation:

Brainliest please?

from which material was the plaster of paris made from?
a) Lime stone
b) Slacked lime
c) Quick lime
d) Gypsum​

Answers

Answer:

d) Gypsum​

Explanation:

Plaster of Paris is obtained by heating gypsum.

I hope this helped :)

Reindeer roam over hundreds of miles to search for food the have a far reaching
A-Niche
B- Habitat
C- Community
D- Ecosystem​

Answers

Answer:

B. Habitat

Explanation:

Ecosystems are geographical regions made up of biotic factors (plants, animals, bacteria) and non-living or abiotic factors (rocks, rainfall, temperature).

They live in groups called communities within their ecosystem and occupy a specific place in their community, a niche - here, they contribute to nutrient cycling and energy flow. They may often wander in search of food, or shelter in a region known as a habitat.

HELP!!!! i’ll give branliest

Answers

Definitely not the first or last but I’m pretty sure it’s the third. I’m sorry if wrong. I’m like 85% sure it’s right

A 2-column table with 4 rows. The first column titled substances has entries gasoline, water, honey, titanium. The second column titled density has entries 0.77 grams per centimeter cubed, 1.00 grams per centimeter cubed, 1.38 grams per centimeter cubed, 4.43 grams per centimeter cubed.
Determine whether each substance will sink or float in corn syrup, which has a density of 1.36 g/cm3. Write “sink” or “float” in the blanks.

Gasoline:

Water:

Honey:

Titanium:

Answers

Answer: Gasoline: Sink

Water: Float

Honey: Sink

Titanium: Sink

Hope this helps.

Answer:

Gasoline: float

Water: float

Honey: Sink

Titanium: Sink

pasteur's experiment provided conclusive evidence to reject the spontaneous generation hypothesis, which states that cells arise from nonliving material. as a consequence, his results supported the all-cells-from-cells hypothesis. which element of pasteur's experimental design was most important and why? see section 1.2 (page) .

Answers

The Experiment name is 'swan neck flask'.

Since only one of his two treatments employed the same type of nutritious broth and flask, only one of his two treatments was exposed to preexisting cells.

Nutrient Broth- A common culture medium for undemanding microorganisms is nutrient broth. Numerous standardized techniques for analyzing meals, dairy products, water, and other items advocate it.

Pre-existing Cell- All cells originate from previously existing cells, according to the third component of the cell theory definition. This implies that cells are not created spontaneously, as the term "spontaneous genesis" implies. Current cells are constantly used to create new ones.

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The point of contact between a motor neuron and a muscle fiber is called

Answers

Answer:

The point of contact between the nerve and the muscle fibers it stimulates is called a: Neuromuscular junction. A single motor neuron with all the muscle cells it innervates is called a: Motor unit.

Explanation:

8. Why is an organism that reproduces asexually genetically identical to it's
parent? *
All of the offspring's genes came from the parent.
All of the offspring's genes mutated to look like the parent's genes.
The offspring inherited only half of the parent's genes.
The offspring inherited only the parent's dominant genes.

Answers

Answer:A

Explanation: A-sexual reproduction is basically the parent making a clone

what directs the action of every cell in your body

Answers

Answer:

The Nucleus of a eukaryotic cell directs the cells activities and stores DNA.

Explanation:

Hope i helped

Biology: For the following fill in the blank questions choose from the following words. Each word may only be used once or not at all: photosynthesis, cellular respiration, abiotic, biotic, primary succession, secondary succession, climax communities, pioneer species, biodiversity, and sustainable.


4. The process by which autotrophs use energy from sunlight to build carbohydrates is called ____________________.

Answers

Answer:

photosynthesis

Explanation:

Each cell runs on the chemical energy found mainly in carbohydrate molecules (food), and the majority of these molecules are produced by one process: photosynthesis. Through photosynthesis, certain organisms convert solar energy (sunlight) into chemical energy, which is then used to build carbohydrate molecules.

Why is one Of the strands of DNA considered leading and the other is considered lagging?

Answers

Answer:

umm

Explanation:

Only the water cycle involves plants and animals. Please select the best answer from the choices provided T F

Answers

Answer:

This is False. Hope this helps!!!

Explanation:

What is the step of cell division where 2 identical daughter cell are formed?

Answers

Answer:

It's MITOSIS.

Explanation: We are also learning about this in class.

During mitosis, a eukaryotic cell undergoes a carefully coordinated nuclear division that results in the formation of two genetically identical daughter cells. Mitosis itself consists of five active steps, or phases: prophase, prometaphase, metaphase, anaphase, and telophase.

In mitosis of the cell cycle, a eukaryotic cell  undergo nuclear division followed by cytoplasmic division results form two genetically identical daughter cells. Mitosis It consist of five phases: prophase, prometaphase, metaphase, anaphase, and telophase.

What is mitosis ?

The process in which somatic cell undergo equational division where equal number of daughter cell produced from their parent cell.

Here the number of chromosomes remains the same, except in the case of germ cells where the number of chromosomes become half and the nucleus of a cell is divided into two nuclei having equal amount of genetic material.

nuclear division is followed by cytoplasmic division after the separation of the nucleus. It is important for the growth of the cells and the replacement of worn-out cells.

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Which is involved in engulfing?
(A)Golgi bodies (B)transport proteins (C)endoplasmic reticulum (D)cell membrane

Answers

Answer:

c

Explanation:

Cell Length of one side Area of one side of the cube (l × w) Surface area (area of one side × 6 sides) Volume (l × w × h) Surface area / volume Ratio of surface area to volume (for example, 5:1) A 1 cm B 2 cm C 3 cm

Answers

The complete question is as follows:

1. What does a surface area/volume ratio of 6:1 mean for the cell’s ability to get the materials it needs that move across its surface?

2. What does a surface area/volume ratio of 3:1 mean for a cell’s ability to get materials across its membrane, compared to the cell with a ratio of 6:1?

Answer:

1 . Surface area to volume ratio =  3 : 1

surface area=   3 cm³ or (l = 1 cm) (1 cm x 1 cm x  3) (W = 3)

volume=  1 cm³  (1cm x 1cm x 1cm)

2. Surface area to volume ratio =  6 : 1

surface area=  6 cm³  or (1 cm x 1 cm x 6 )  (w= 6)

volume=  1 cm³

Diffusion increases with the increase in surface area to volume ratio through the semi-permeable membrane of the cell membrane that allows substances to move into the cytoplasm

(Score for Question 2:
of 4 points)
2. Explain how to focus a microscope using the high power lens. Include any safety issues you need to be
aware of
Answer.
Type your answer her to focus a microscope using the high-power lens you have to use the focus adjustment
knob but be careful because if you crank down too hard you can damage the microscope and the slide
Is my answer right

Answers

To focus a magnifier using the high-energy lens you haveto use the main focus adjustment knob however take care as a result of if youcrank down too hard, you'll be able to harm the magnifier and therefore the slide.

Fine Adjustment Knob - This knob is within the coarse adjustment knob and is employed to bring the specimen into sharp focus underneath low power and is employed for all focusing once using high power lenses.

You don't wish to wreck the slide. therefore you ought to forever look on the aspect of the magnifier therefore you do not break it and use fin adjustment knob only.

Hope it helps!

in a chemical reaction bonds in the reactants molecules are broken and new bonds are formed to yield products. how does an enzyme make this happen an optimal rate in a cell?

Answers

Answer:

A. It increases the amount of energy needed to break the bonds in the substrate.

Explanation:

Enzymes are known to be protein-based catalyst. It helps to speed up the chemical reactions that take place in the human body. They actually bind molecules and work in ways to alter chemical reactions. These enzymes are needed for food digestion, reproduction, healing diseases, blood coagulation, etc.

Enzymes help to increase the rate of reaction by lowering the activation energy. Certain enzymes can work to convert substrate to product at million of times faster. As a catalyst, it increases the energy needed to break bonds found in the substrate. This makes the reaction to occur at a faster rate.

Is the answer I choose for this correct

Answers

Yes it is. Correct !!!!!

Cassandra notices that when she breathes on a cool window, the water vapor in her breath forms liquid water. What happens to turn the water vapor in her breath into liquid water?

Heat is added to the water vapor from the surrounding air.

The temperature of the water vapor increases as it leaves her body.

The water molecules become more spread apart as they touch the window.
Heat leaves the water vapor as it touches the cool window

Answers

Answer:

Heat is added to the water vapor from the surrounding air.

Explanation:

Hope this helps ;)

How do you determine a average velocity from t=0s to t=12s

Answers

Answer : Determine the skater's average velocity from t=0s to t= 12s. Velocity = displacement Xp-X, 1 time met 0-0 12 secs

this is my question :>

Answers

The answer is 23 chromosomes.
The answer should be 23 I’m positive that it’s 23

investigating the relationship between reopening the economy and implementing control measures during the covid-19 pandemic

Answers

There is great relationship between reopening the economy and implementing control measures during the covid-19 pandemic.

What is the relationship between reopening the economy and implementing control measures?

There is great relationship between reopening the economy and implementing control measures during the covid-19 pandemic because if the control measures are implemented correctly then the reopening of economy is a good decision. Due to this, we can carried out the economic activities without any fear of the pandemic.

So we can conclude that there is great relationship between reopening the economy and implementing control measures during the covid-19 pandemic.

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This occurs when two DIFFERENT species have to use the same limited resources and there aren't enough for both species.​

Answers

Competition will occur, resulting in one of the two species surviving and the other dying out or moving

Help with this ASP please

Answers

Answer:

Covalent bonds formed by shared electrons between atoms.

Explanation:

Raymond is a social worker who works with abused children. Which type of empathy is it important that Raymond have?
Group of answer choices

Pity

Feeling

Cognitive

Affective

Answers

I believe it is Feeling

Cellular respiration is an exothermic reaction and photosynthesis is an endothermic reaction. How does the required activation energy compare for these two reactions?.

Answers

Because the products are at a lower energy level than the reactants, cellular respiration requires less energy to start the reaction.

The activation energy is the bare minimum of energy required for compounds to undergo a chemical reaction. In an exothermic reaction, breaking bonds in the reactants requires less energy than the energy produced when new bonds form in the products. The term "exothermic" literally means "give out heat." Exothermic reactions occur during cellular respiration.

An endothermic reaction, on the other hand, requires more energy to break bonds in the reactants than is released when new bonds form in the products. The term "endothermic" literally means "take up heat." Exothermic reactions occur during cellular respiration.

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i need this i am doing a finals review.

Answers

Answer:

B. Evaporation

Explanation:

The answer will be B because liquids turn into a gas

Before Reading:
1. What health concerns are associated with smoking cigarettes? Which of these concerns

Answers

bad lungs , bad breath

Answer:

Some concerns include lung health decreasing, and dental health, as well as hearth health. Smoking can deliver soot, and toxic compounds to your lungs, heart, kidney, and other bodily functions will be disabled. Hope this helps!

a heterotrophic prokaryote would: group of answer choices derive energy from inorganic compounds derive carbon from co2 derive carbon from organic compounds derive energy from sunlight

Answers

A heterotrophic prokaryote would derive carbon from the Organic compounds which are present around their environment

Heterotroph are the organism that ought to acquire its carbon in an organic form or an organism that cannot make its very own food and receives its meals with the aid of eating different living things

Chemotroph are the organism that profits power from chemicals  , example bacteria

Phototroph are the  organism that profits electricity through photosynthesis example - flowers

most of the people of heterotrophic microorganisms are chemoheterotrophs that derive both power and carbon from natural compounds.

heterotrophs is the largest mode of nutrients which includes, saprophytes ( fungi) , parasites ( cuscutta), chemotroph.  

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Do animal cells always have to be placed in isotonic solutions? Why?

Answers

Explanation:

because If a cell is placed in an isotonic solution, there will be no net flow of water into or out of the cell, and the cell's volume will remain stable

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