when does the embryo form?

A. At the end of the third trimester
B. A few days after fertilization
C. In the second trimester
D. At the end of the first trimester

Answers

Answer 1
Embryo forms at the end of the first trimester,, D
Answer 2
D. at the end of the first trimester

Related Questions

Derived from a scandinavian word, a skulk is the group or collective name for what animal?.

Answers

Answer:

Explanation:

-The group of foxes is called skulk:-)-

Which scientist proved the existence of a virus as a new type of pathogen?

Answers

Answer:

Dmitri Ivanovsky

Explanation:

Dmitri Ivanovsky utilized one of these filters in 1892 to demonstrate that despite being filtered, sap from a diseased tobacco plant remained infectious to healthy tobacco plants. The filtered, infectious substance was dubbed a "virus" by Martinus Beijerinck, and this discovery is regarded as the origin of virology.

Some cells surround and take in materials by the process of….?

Answers

Endocytosis

cell surrounds and takes in material from environment.

A (n) ______ is a device with spinning blades that is used to create electricity.
A) Downstream
B) Meltdown
C) Turbine
D) Ethanol
E) Passive solar cooling
F) Utility
G) First Law of Energy
H) Refinery
I) Isotopes
J) Second Law of Energy

Answers

A. Turbine because turbines because i took the quiz

Answer:

The answers is (c. Turbine)

Give an example of a negative feedback loop.

Answers

During the menstrual cycle, once an ovarian follicle has been stimulated it releases a hormone that inhibits FSH and LH so that another follicle doesn’t grow

How does the carbon locked in shells of marine organisms move back to the atmosphere?

A.

through subduction of deposits and volcanism

B.

through the process of respiration in these organisms

C.

through death and decomposition

D.

through the microbial process of ammonification

E.

through chemical reactions in acidifying oceans

IT'S NOT B OR C

Answers

Answer:

Explanation:

A.

through subduction of deposits and volcanism

Tree squirrels can have different fur colors.

Squirrels live in forests where foxes also live. Foxes hunt squirrels for food. Squirrels that have fur the same color as the trees are harder for the foxes to see and catch.

[IMAGE ONE]
The diagram above shows a population of squirrels that lived in a forest. Scientists had previously only seen brown and gray squirrels in this forest; they had never seen squirrels of any other color.

The diagram below shows how the population changed after many generations.
[IMAGE TWO]
How did the color of the trees in the squirrels’ environment change? Explain what happened to the squirrels over many generations.

Answers

Answer:

The gray squirrels were easy to see and catch so they died quickly and the population dwindled. The brown squirrels were probably almost the same color as the tree so they were harder to see and catch. The remaining gray squirrels ended up having no other options than to mate with brown squirrels, which probably made appear black squirrels and since the black squirrels population raised, means they are harder to see and be caught by foxes.

How the trees became more black too? I have no idea, sorry.

Explanation:

squirrels: brown, gray

what are the major schools of thought on personality

HELP PLEASEEE!!!

Answers

Answer:

Structuralism and Functionalism

Explanation:

Structuralism is widely regarded as the first school of thought in psychology. This outlook focused on breaking down mental processes into the most basic components. Major thinkers associated with structuralism include Wilhelm Wundt and Edward Titchener.

_____1. Biome
A. Ecosystem B. Evergreen C. Taiga D. Tundra
2. Desert
A. Cactus B. Oldest Biome C. Tundra D. Desert
3. Tundra
A. Deciduous B. Oldest Biome C. Arctic D. Tropical Rain
4. Fires
A. Evergreen B. Savannah C. Arctic D. Taiga
5. Treeless

Answers

[tex] _______________________________[/tex]

See Below ~

1.A.

2.B.

3.A.

4.B.

5.?

[tex] ________________________________[/tex]

What is the genotype of a true
breeding tall plant in Mendel's
cross?
A. Tt
B. TT
C. tt

Answers

Answer:

The genotype of a true breeding tall plant in mendel's cross is TT

The genotype of a true breeding tall plant in mendel's cross is TT. Thus, option B is correct.

What is Anabolic hormone ?

Anabolic hormone has the one that has been involved in the formation of some specific substance just inside the body. Thus it can include repair of the damaged tissues as well as the growth of the muscles as well. There are the examples of the anabolic hormones which are insulin, growth hormones, testosterone, etc.

Insulin has been considered as the sugar regulatory hormone which is made up of the polypeptide chains. It has been called an anabolic hormone because it will promotes the uptake of the glucose by the cells in order to reduce the blood glucose levels. This promotes the formation of the glucagon which is a stored form of energy that can be result in increase muscle mass.

Therefore, The genotype of a true breeding tall plant in mendel's cross is TT. Thus, option B is correct.

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the structure labeled 2 represents a molecule of

a
DNA
b
mRNA
c
tRNA
d
rRNA

Answers

Answer:

The structure labeled 2 is tRNA, transfer RNA

Which gland is responsible for production of estrogen and ova?.

Answers

Answer:

Ovaries

The ovaries are small, oval-shaped glands that are located on either side of the uterus. The ovaries produce eggs and hormones.

why is a buffalo more adapted for wet conditions?​

Answers

Answer:

It is because of its morphological and anatomical characteristics that the buffalo is so well suited to hot and humid climates and muddy terrain.

a protein produced by the mutated sequence will differ in what?

Answers

By changing a gene's instructions for making a protein, a variant(mutated protiens) can cause a protein to malfunction or to not be produced at all. When a variant alters a protein that plays a critical role in the body, it can disrupt normal development or cause a health condition.

what is needed to create a self-sustaining ecosystem inside of a dome?

Answers

Just like any ecosystem, a self-sustaining ecosystem needs light for primary production and nutrient cycling. The environment must find an ecological balance and be able to support the survival and reproduction of all organisms living inside it

which of the following statements describes pepsin
a it is manufactured by the pancreas
b it helps stabilize fat water emulsions
c it splits maltose into monosaccharides
d it begins the hydrolysis of protein in the stomach

Answers

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D. it begins the hydrolysis of protein in the stomach

Saffron an expensive spice originates from Iran is derived from which flower?

Answers

Answer:

Explanation:

flower Crocus sativus

Saffron is the most expensive spice in the world, going for up to $16 per gram—and with good reason. It comes from the dried bright orange-red stigmas of the flower Crocus sativus.

What is it called when a species
completely dies off?
Helllllppppp

Answers

Answer:

Extinction

Explanation:

Extinction is a procedure in which reinforcement of a previously reinforced behavior is discontinued; as a result, occurrences of that behavior decrease in the future.                    

Extinction!

When the whole species dies off it’s called extinction and that sources is considered extinct! In rare cases some animals have come out of extinction due to uncharted forest/jungles. But with modern technology we lucky are pretty good at estimating where and how many are left in a specific species.

What is the ocean melting greenlands mission

Answers

Answer global warming

Explanation:

because you a cougar

Temperature, cloud cover, and thunder are all examples of
O a. storms
O b. weather
O c. climate
O d. barometric pressure

Answers

B they are examples of weather

Temperature, cloud cover, and thunder are all the examples of weather. Thus, the correct option is B.

What are the weather conditions?

Weather is the state of the atmosphere. This is the degree to which it is hot or cold, wet or dry, calm or stormy, clear or cloudy at a geographical location. On the Earth, most weather phenomena occur in the lowest layer of the planet's atmosphere, the troposphere, just below the stratosphere of the Earth.

Weather refers to the day-to-day temperature, precipitation, and other atmospheric conditions, whereas the climate is the term for the averaging of atmospheric conditions over longer time periods.

Weather includes the sunshine, rain, cloud cover, winds, hail, snow, freezing rain, flooding, ice storms, thunderstorms, steady rains from a cold front or warm front, excessive heat, and heat waves.

Therefore, the correct option is B.

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Which terrestrial planet has a temperature range of 400C to -200C

Answers

The surface temperatures of the planets ange from more than 400 degrees on. Mercury and Venus to below -200 degrees on the distant planets.

Which terrestrial planet has the largest range of temperature?

Mercury is very near to the Sun and has no significant atmosphere. These elements donate to the fact that the texture of Mercury has the most temperature span of any planet or realistic satellite in our solar system.

Thus, Mercury and Venus to below -200 degrees on the distant planets. The factors that.

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Which choice below would represent an
organism with two dominant alleles?
A. Bb
B. bb
C. BB

Answers

Answer:

BB

Explanation:

BB means two dominant alleles

50 points!!
What type of nerve ending senses where parts of the body are located?
mechanoreceptors
pain receptors
proprioreceptors
thermoreceptors

Answers

Answer:

it is near the skins surface

Explanation:

and there based on morphology like so you feel warmth cold and freezing sweating all

Type of Receptor Location Sensation

Ruffini's corpuscles Dermis Touch, pressure, propioception

Nerve ending Hair follicle Touch

Cold receptor Dermis Cold

Warm receptor Dermis Warmth

-526073

Answer:

proprioreceptors

Explanation:

a
3. Choose the correct answer.
In plant cells the pigment that allows for the food-making process is:

chlorophyll

glucose

carbon dioxide

O cellulose

oxygen

Answers

Answer

chlorophyll

Explanation:

Chlorophyll is a pigment that gives plants their green color, and it helps plants create their own food through photosynthesis

Chlorophyll Or glucose

Freshwater leeches attach to fish and suck blood from the fish for extended periods of time. This results in sores on the fish that often become infected.


what is This relationship is best described as i will mark brainliest if less than 10 min im in junior high

.

Answers

Answer:

Parasitism

Explanation:

This type of relationship involves one organism living with, on, or inside another organism and harming it. This relationship involves:

Host - the one being harmed in parasitism in this case the fish.

Parasite - the organism (the one doing the harm) that benefits in parasitsm in this case the leech.

Why are pigments important to the process of photosynthesis.

Answers

Answer:

The importance of pigment in photosynthesis is that it helps absorb the energy from light. The free electrons at the molecular level in the chemical structure of these photosynthetic pigments revolve at certain energy levels.

Explanation:

Which force most likely created this mountain?

compression
gravity
shearing
tension

Answers

Your answer is the first one which is compression.

Hope that helps.

Answer: Compression

Explanation: got it right on edge

cells must control gene expression so that

Answers

Different cells can develop
Cells can differentiate their functions.

Job specialization (like the different functions of eye cells vs stomach cells) occurs as a result of cells controlling certain parts of their gene expression. When a gene is expressed or repressed, it has an effect on what the cell can do and thus that cell’s impact on the entire body.

why do cells need to regulate what goes in and out of them?

Answers

my Answer:

These molecules are essential for living things. The cell membrane controls what goes in and out by having protein channels that act like funnels in some cases and pumps in other cases. Passive transport does not require energy molecules and happens when a funnel opens in the membrane, letting molecules flow through
Explanation:
am i right? it would be helpful if u would rate so i can adjust my answer

The thin layer of cells that makes up the interior lining of the blood vessels is called the Select one: a. mucosa. b. epithelium. c. endothelium. d. connective tissue. e. lymphoid tissue.

Answers

Answer:

C. The endothelium is the thin layer of cells that makes up the interior lining of the blood vessels

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