1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
egoroff_w [7]
3 years ago
7

What is the first step of pregnancy

Biology
2 answers:
luda_lava [24]3 years ago
6 0

Answer: Fertilization

The stages of pregnacy are:

  • Fertilization
  • 1-week conceptus
  • 2-week conceptus
  • 3-week embryo
  • 4-week embryo
  • 5-week embryo
  • 6-week embryo
  • 7-week embryo
  • 8-week embryo
  • 9-week fetus
  • 12 week fetus

fredd [130]3 years ago
4 0
Missed period I believe
You might be interested in
How many nanometers are there in 520 meters?
Ganezh [65]

Answer:

520,000,000,000 Nanometers = A

Explanation:

7 0
3 years ago
Read 2 more answers
A pregnant woman at 37 weeks gestation calls the clinic to say she thinks that she is in labor. the nurse instructs the woman to
Andreas93 [3]
<span>occurring about every 5 minutes

Have a great day!</span>
4 0
3 years ago
Sort the different barriers into their modes of reproductive isolation. A snail with a flat disc-like shell will not be able to
Stella [2.4K]

Answer/Explanation:

Types of reproductive isolation include: temporal, ecological, mechanical, and behavioural.

A snail with a flat disc-like shell will not be able to mate with a snail having a conical shell - this is an example of mechanical isolation, where the animals are physically unable to mate due to incompatible body shapes and sizes.

The reproductive organs of male bush babies do not match with the reproductive organs of females of other bush baby species. - this is another example of mechanical isolation, as the sexual organs will physically not allow reproduction between these species

The mating call of a cricket is not recognized by a cricket of other species - this is an example of behavioural isolation, which results from incompatible mating rituals. I.e. the animals do not respond to each others mating behaviours

The signals sent by a male firefly are not recognized by the female firefly of other species. - this is also an example of behavioural isolation.

Temporal isolation is where species cannot interact because they do not have the same mating seasons or are not active at the same type of day. ?Ecological isolation occurs when two species do not come into physical contact to one another because they access different areas of the habitat. E.g. mating zones, food sources or nesting sites.

8 0
3 years ago
Read 2 more answers
What are different of Light and electricity<br> Giving brainlest :) uwu
Soloha48 [4]

Answer:

, electricity is just electrons (sub atomic particles) moving through a conductor. Light is also just subatomic particles moving through a conductor (1.e. transparent medium) and both are part of the electromagnetic spectrum.

7 0
2 years ago
Read 2 more answers
hypothesis that guided some biochemical research in the 1930s was: “Citric acid plays an important role in the breakdown of carb
aev [14]

Answer:

b. How does food yield energy?

Explanation:

The main question is how energy is produced from food such as carbohydrates, fats and proteins etc. First the carbohydrate is converted into glucose molecule and then glucose is absorbed by the cell and is broken down in the mitochondria of the cell with the addition of oxygen and generate energy in the form of adenine tri phosphate. All the scientists wants to know that how a food is converted into energy.

5 0
3 years ago
Other questions:
  • Which statements describe primary consumers? Check all that apply.
    7·2 answers
  • What is a difference between therapeutic cloning and reproductive cloning? Reproductive cloning produces cells that are genetica
    5·2 answers
  • How do environmental factors influence genetic traits?
    11·2 answers
  • Can someone help me
    15·2 answers
  • What do the amino acids tyr, asn, and thr have in common?
    9·1 answer
  • What would occur if cells were in mitosis more than they were in interphase?
    8·1 answer
  • HIV, the virus that causes AIDS, is a retrovirus. Which of the following sentences BEST defines a retrovirus?
    11·1 answer
  • How do gray whales migrate?
    14·1 answer
  • Why do the alveoli fill with fluid.
    6·2 answers
  • Which of the following is NOT a reactant
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!