Which happens during the second trimester?
O A. The vocal cords develop.
O B. The heart starts working.
C. Rhythmic breathing starts.
D. Blood begins to form.

Answers

Answer 1

Answer:

A

Explanation:

Answer 2

The heart starts working. Thus the correct option is B.

What happen during first trimester?

From the time of conception,  baby will grow and change inside uterus until he or she is born. Each trimester has a unique set of milestones. In the first trimester, your baby will grow from a fertilized egg into a moving fetus with eyes, ears, and working organs.

In the second trimester, baby’s features develop and expecting mother may be able to feel baby move. In the third trimester, baby will grow rapidly to get ready for birth.

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Related Questions

What percent will have spots ?
25 %
0 %
50

Answers

About 50% will have spots

Explain why the forest ecosystem is a system.

Answers

A forest ecosystem is a natural woodland unit consisting of all plants, animals and micro-organisms (Biotic components) in that area functioning together with all of the non-living physical (abiotic) factors of the environment. The forest ecosystem is very important.

Answer:

Like all ecosystems, forests consist of many interacting parts. They include living organisms such as plants, animals, and fungi. Forests also include non-living components that these organisms depend on, such as the soil and climate. As stated in the article, one change, such as pollution, can cause a ripple effect through the ecosystem. Dying lichens are one of the earliest signs of pollution. In turn, the loss of the lichens can cause a decline in species that rely on the lichens for survival.

Explanation:

That is the sample answer.

If you could repeat the experiment and make it better, what would you do differently and why?

Answers

Answer:

Nothing different, perform the same thing and see if I get the same results.

Explanation:

Answer:

Nothing different, perform the same thing and see if I get the same results.

Explanation:

Which of these is a function of the placenta?
A To deliver the blastocyst after childbirth
B. To carry nutrients to the cells of the uterus
C. To carry wastes away from the embryo
O D. To develop into fetal reproductive tissues

Answers

Answer:

c

Explanation:

The force of the Earth's gravity on an object gives the object its __________.
volume
mass
weight
density

Answers

Answer:

weight

Explanation:

The gravitational force between a mass and the Earth is the object's weight.

Answer:

Weight

Explanation:

Whe weight of an object is the force of gravity on the object and may be defined as a mass times the acceleration of gravity,w=mg.Since the weight is a force,its SI unit is the newton.

PLEASE I NEED HELP IN THIS!! THIS WORKSHEET HAS 50 QUESTIONS BUT I ONLY NEED HELP WITH THESE. DONT JUST TYPE IN A RANDOM ANSWER I NEED A 1-2 BRIEF EXPLANATION FOR EACH TO WHY THEY ARE CORRECT!!
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1. All of the following are true about muscle tissue EXCEPT: *
a) Heart muscles are called cardiac muscles and are not voluntary.
b) Skeletal muscles are usually attached to bones and assist with voluntary movements.
c) There are no striations in smooth muscle which assist with involuntary movement.
d) When a muscles is relaxed, myosin and actin filaments are attached.

2. The development of the male reproductive system occurs in coordination with other human systems. Which of the following is an example of this coordination? *
a) The endocrine system releases the hormone testosterone.
b) The muscular system strengthens the uterine wall.
c) The circulatory system restricts blood flow to the testes.
d) The excretory system removes urea from the blood.

3. How does puberty affect the male and female reproductive systems? *
a) The male reproductive system develops into the female reproductive system during puberty.
b) The male reproductive system produces sperm, where as the female reproductive system produces eggs and nourish a developing embryo
c) The female reproductive system develops during puberty when the thyroid gland releases FSH and LH.
d) The female reproductive system stimulates cells within the ovaries to produce increased amounts of testosterone to start producing egg cells.

4. How does a feedback mechanism regulate the activity of the endocrine system? *
a) A feedback mechanism releases hormones in response to rising levels of other hormones to maintain homeostasis.
b) The endocrine system shuts off when the feedback mechanism shuts off.
c) A feedback mechanism regulates the endocrine system by strengthening the original stimulus.
d) A feedback mechanism changes the external environment to maintain homeostasis.

5. What is the role of neurons in the nervous system? *
a) Neurons heal damaged nerves.
b) Neurons transmit messages in the form of electrical impulses.
c) Neurons are involved in the autonomic nervous system, but not the somatic nervous system.
d) Neurons are the the sodium-potassium pumps involved in the nerve impulse.

6. Environmental management may include which of the following? (Check all the applicable boxes. There may be more than one answer). *
a) Public presentations
b) Field and lab research
c) Oversee projects related to the protection and conservation of natural ecosystems and human health.
d) Consult with businesses and government.

7. Which of the following is NOT an organ of the human male reproductive system? *
a) Testes
b) Vas deferans
c) Urethra
d) Nephron

8. Which of the following is NOT an organ of the human female reproductive system? *
a) Vagina
b) Urinary bladder
c) Ovaries
d) Fallopian tubes

9. Which is the correct order of development? *
a) gastrulation, egg, zygote, eight cell, blastula, morula
b) egg, zygote, morula, eight cell, blastula, gastrulation.
c) egg, zygote, eight cell, morula, blastula, gastrulation
d) zygote, blastula, egg, morula, eight cell, gastrulation

10. Biotechnology careers include all of the following EXCEPT: *
a) Microbiologist
b) Process development scientist
c) Health engineer scientist
d) Biomanufacturing specialist

11. The human brain contains different regions that control specific bodily functions. On a model, how could you identify the region of the brain that is responsible for voluntary activities of the body, intelligence, learning, and judgment? *
a) This region is the thalamus, between the brain stem and the cerebrum.
b) This region is the brain stem, connecting the brain to the spinal cord.
c) This region is the cerebellum, divided into left and right hemispheres.
d) This region is the cerebrum, the largest region in the brain.

12. Forensic science may prove the existence of a crime, the perpetrator of a crime, or a connection to a crime through all of the following EXCEPT: *
a) the testimony of a forensic scientist
b) an attorney's argument
c) administration of tests
d) examination of physical evidence

Answers

Answer:

1. D.

Explanation:

A, B, and C are correct

Myosin is attached to actin filaments when muscles are in motion, not relaxed.

An igneous rock formed inside the Earth with large crystals in called an

Answers

Answer:

granite I think

What is currently happening with Mount Etna?

Answers

Answer:

As Italy’s National Institute of Geophysics and Volcanology (INGV) explains on a recent blog post, the nascent eruption began on the night of May 29. Starting off by producing a thick column of ash rising from the New Southeast Crater, it gave way on May 30 to a far more lava-heavy display in the area, featuring two fissures blenching out lava.

Answer:

There is currently no eruptive activity at the volcano involving fresh lava and monitoring signals do not suggest an immediate change likely; only a weak thermal anomaly continues to be present from the southeast crater complex.

Explanation:

Which of the following is not an advantage of asexual reproduction
1) not requiring a mate
2) requiring less energy
3) diversity or unique

Answers

Answer:

3.

Explanation:

There is no diversity in asexual reproduction.

All living organisms are made up of cells. Cells are the basic units of life. In complex living organisms, cells are organized into tissues, tissues are organized into organs, and organs are organized into organ systems. What characteristic of life does this information represent?
A.
Life tends to be chaotic and random.
B.
Life can be arranged in a structural hierarchy.
C.
Life does not demonstrate order in its systems.
D.
Life is composed of only complex organisms.

Answers

Answer:

C

Explanation:

The answer is B because life can be arranged in a structural hierarchy

which is found in the highest concentrations in the atmosphere?

Answers

Answer: By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.04% carbon dioxide, and small amounts of other gases. Air also contains a variable amount of water vapor, on average around 1% at sea level, and 0.4% over the entire atmosphere.

Explanation:

What are cilia?
A. false feet
B. skinny tails
C. hairlike projections
D. temporary extensions

Answers

Answer:

c. hairlike projections

Explanation:

it sweeps mucous and dirt out if our lungs.

Hope this helps :)

True/False: Disease and Invasive Species are two causes of extinction.

Answers

Answer:

True

Explanation:

Answer:

True.

Explanation:

S-waves arrive at a seismic station?

First
Second
Third
Fourth

Answers

Answer:

First

Explanation:

S-waves arrive first at a seismic station

which of the following definitions is the correct description of symbiosis

Answers

Answer:

A symbiosis is an evolved interaction or close living relationship between organisms from different species, usually with benefits to one or both of the individuals involved.

symbiosis is an evolved interaction or close living relationship between organisms from different species, usually with benefits to one or both of the individuals involved.

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Harry wrote the following examples of homeostasis:

Example 1: An electric blanket provides warmth when it's cold
Example 2: The kidney and other organs remove waste from the human body
Example 3: Some animals migrate to find food
Example 4: Power plants provide electricity for homes


Which of these is a correct example of homeostasis?

Example 1
Example 2
Example 3
Example 4

Answers

It is example 2.

Explanation:

Answer:

B, example 2

Explanation:

I took the test myself I know its right

if you want an answer to a different question on this quiz ask me in the comments.

A virus is a _____.

plant
animal
plant and animal
none of the above

Answers

Answer: None of the above

Explanation: Viruses don't even meet all requirements to be classified as life, so it's definitely not a plant nor animal

Hope this helps :)

Answer:

none of the above

Explanation:

A cell has a 1% salt concentration. It is placed into a solution containing a 10% salt concentration.
What will happen to the cell?
Choose 1 answer:

Water will move out of the cell, causing it to swell.

Water will move into the cell, causing it to shrink.

Water will move into the cell, causing it to swell.

Water will move out of the cell, causing it to shrink.

Answers

Answer:

Water will move out of the cell, causing it to shrink.

Explanation:

When something with a low salt concentration is placed in a higher concentration of salt, the salt in the solution will try to suck out the water in the cell. Just remember why we hate salt, because it sucks! There's a little joke to help u remember. Thanks, Ms. Hoj :)

Answer:

CORRECT (SELECTED)

Water will move out of the cell, causing it to shrink.

Explanation:

The cell has lower concentration of solute and a higher concentration of water than the solution it is placed in. This means that water will move out of the cell, causing it to shrink.

Which of the following is always true of two organisms in
the same taxonomic class?

A.They can breed with one another

B.They have certain physical features in common

C.they evolved at the same time

D.they live in the same ecosystem​

Answers

Answer:

they can breed with one another, they have certain physical features in common, they evolved at the same rate, they live in the same ecosystem. Lions and house cats share common features, but cannot breed with one another.

Explanation:

They share a common ecology, they may breed with one another, share some physical characteristics, evolve at the same rate, and inhabit the same ecosystem, hence option D is correct.

What are the taxonomic classes?

If two species are members of the same class, they are also members of the same higher-level taxon. They share the same phylum and kingdom in this instance.

Kingdom, phylum or division, class, order, family, genus, and species are the seven main taxonomic ranks.

The taxon with the greatest number of species is the kingdom. In taxonomy, it is the broadest category into which the creatures can be divided.

The classification of five kingdoms was made by R.H. Whittaker. The kingdoms of Monera, Protista, Fungi, Plantae, and Animalia are included in this classification.

Therefore, option D is correct.

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What is the term for a feature that allows an organism to survive better in its environment?

Answers

Answer:

adaption

Explanation:

the answer is adaptation

А __ is an agent that can cause infections and diseases.

Answers

Explanation:

I think it would be easier if u have options but I will help as much as I know abt this.. so The agents that cause disease fall into five groups: viruses, bacteria, fungi, protozoa, and helminths (worms). Protozoa and worms are usually grouped together as parasites, and are the subject of the discipline of parasitology, whereas viruses, bacteria, and fungi are the subject of microbiology.

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A student examines a sample of pond water under a microscope and observes a single-celled heterotrophic eukaryote swimming through the water. To which of the following Kingdoms does this organism most likely belong?
Protista
Fungi
Plantae
Bacteria

Answers

Answer:

The answer is C. Plantae

Plantae is a taxonomic group that includes land plants and green algae.

The kingdom that does this organism most likely belongs to the Fungi. Thus, the correct option for this question is B.

What are Eukaryotes?

Eukaryotes may be defined as the type of organisms that have a well-defined nucleus and other membrane-bound cell organelles in their cells. These types of organisms have compartmentalization which facilitates each and every specific function.

According to the context of this question, only fungi are the only organisms that are single-celled eukaryotes that are heterotrophic in nature.

Protista is also a kingdom that has single-celled organisms but these organisms are autotrophic and heterotrophic both. Plantae is generally autotrophic in nature. While bacteria belong to the prokaryotic origin.

Therefore, the kingdom that does this organism most likely belongs to the Fungi. Thus, the correct option for this question is B.

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Lawmakers discuss methods of preventing pollutants that could directly start a positive feedback loop in the area shown in the picture. Which of these actions should they take?

Answers

Lower allowed concentrations of particulate matter released from factory smokestack is the action which should be taken to prevent pollutants.

What is a Pollutant?

This is a substance which produces undesirable effects in the environment and sources include automobiles etc.

Preventing pollutants that could directly start a positive feedback loop in the picture is by lowering allowed concentrations of particulate matter released from factory smokestack which is why option D was chosen.

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Which one has higher ecosystem diversity, rain forest or desert?

Answers

Answer:  The Rain forest

What is the purpose of the ATP and NADPH produced in the light reactions of photosynthesis?
A. to transfer light energy to excited electrons
B. to stop the electron transport chain
C. to act as carrier proteins in inner mitochondrial membranes
D. to transfer energy to compounds forming three carbon sugars

Answers

Answer: D. to transfer energy to compounds forming three-carbon sugars

Explanation: ATP and NADPH are produced in the light reactions by
when energy absorbed from the sun is conserved as ATP and NADPH. ATP and NADPH generated in the light reactions of photosynthesis are used to synthesize carbohydrates from carbon dioxide and water. The ATP and NADPH are used to reduce CO2 to triose phosphate which can be used to produce glucose. Green plants contain unique enzymatic machinery in their Chloroplasts which catalyzes the conversion of carbon dioxide to simple organic compounds in a process known as CO2 assimilation or carbon fixation. In this carbon fixation reactions, ATP and NADPH is used to drive the incorporation of carbon dioxide into ribulose 1,5-bisphosphate to produce glyceraldehyde 3-phosphate (a 3-carbon sugar) in a series of enzyme catalyzed reactions.

What type of structure forms when a speleothem on the ceiling of a cavern meets with a speleothem on the floor of a cavern?

Answers

Answer:

A column

Explanation:

Stalactite and stalagmite, elongated forms of various minerals deposited from solution by slowly dripping water. A stalactite hangs like an icicle from the ceiling or sides of a cavern. A stalagmite appears like an inverted stalactite, rising from the floor of a cavern.

what evidence supports the claim that the earth has layers?

Answers

Answer:

There are many ways scientists can gather evidence to learn about Earth's interior including direct evidence from rock samples and indirect evidence from seismic waves.

also

1. Seismic waves and earthquakes

2. Volcanoes

3. Principles of density

​4. Earth is magnetic

Explanation:

help needed plsss !

Answers

Answer:

b. G

Explanation:

In RNA transcription, uracil pairs with adenine instead of thymine.

During which phase of meiosis does crossing over of chromosomes occur?
prophase I
metaphase I
anaphase I
telophase I

Answers

Answer:

prophase l

Explanation:

Answer:

prophase 1

Explanation:

What is the difference between a trapezoid and a rhombus? A) A trapezoid is a parallelogram and a rhombus is not. B) A rhombus always has 4 equal sides and a trapezoid does not. C) A rhombus always has 4 right angles and a trapezoid does not have to. D) A rhombus never has 2 sets of parallel sides and a trapezoid always does. Submit

Answers

Answer:B

Explanation: A rhombus has 4 equal sides constantly where as a trapezoid can have up to 4 different sides

Answer:

idk lol wth

Explanation:

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