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3 years ago

Keira is giving birth and is attempting to pass the placenta. She is in the ________ stage of birth.

Biology

1 answer:

lubasha [3.4K]3 years ago

4 0

Answer:

The correct answer is- third stage

Explanation:

Labor is divided into three stages first stage, second stage, and third stage. The first stage starts when a contraction starts which dilates the cervix and it ends when the cervix gets fully open.

In the second stage, the baby is pushed by the mother through the birth canal. It ends with the delivery of the baby. After the baby is born the third stage starts and the third stage ends with the separation of the placenta from the uterine wall and safely passed out through the vagina. Therefore the right answer is the third stage.

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Which of these gymnosperms are known to be important in maintaining the balance of carbon in an ecosystem?

CaHeK987 [17]

The correct answer is: [D]:

___________________________________________________

→ " redwood tree forests " .

___________________________________________________

Note: Let us consider the other answer choices.

___________________________________________________

Choice: [A]: "garden flowering plants" ; is incorrect — since these are not generally considered to be part of a true or traditional "ecosystem" ; and especially since "garden flowering plants" are, in fact, "flowering plants" — which means that they are "angiosperms" — Not "gymnosperms ".

→ Rule out: " Choice: [A] " .

__________________________________________________

Choice: [B]: " ferns and liverworts " ; is incorrect — since both ferns — as well as liverworts — are Not "gymnosperms ".

Liverworts are "bryophytes" {which lack true vascular tissue] ; and ferns are "pterophytes" ["seedless vascular plants"].

→ Rule out: " Choice: [B] " .

___________________________________________________

Choice: [C]: " mosses and horsetails "; is incorrect ; since both mosses — as well as horsetails — are Not "gymnosperms ". Mosses are "bryophytes" (see aforementioned) ; and horsetails are "non-seed bearing plants" that spread vegetatively [underground; by asexual reproduction — and Not by seed .].

→ Rule out: " Choice: [C] " .

__________________________________________________

Choice: [D]: " redwood tree forests " ;

— is the only answer choice provided that is a "gymnosperm".

Furthermore, the "redwood tree" is a conifer (i.e. "coniferous; or, "cone-bearing" plant} that reproduces through seeds spread by "cone") — and all "conifers" are a type of "gymnosperm."

Furthermore, "redwood trees" grow large and tall, and redwood forest communities within an ecosystem; due to there size and presence, are: "known to be important in maintaining the balance of carbon in an ecosystem."

__________________________________________________

→ As such, the correct answer is:

__________________________________________________

→ Answer choice: [D]: " redwood tree forests " .

__________________________________________________

Hope this helps!

Best wishes to you in your academic endeavors

— and within the "Brainly" community!

__________________________________________________

5 0

3 years ago

Read 2 more answers

The body of fish is streamlined why

Ronch [10]

Hopes this helps:

Answer:

The body of a fish is streamlined because, it increase the speed of the fish in the water. The more the streamlined shapes more easier for the fish to swim in the water.

3 0

3 years ago

Miracle play the meaning

Artyom0805 [142]

: a medieval drama based on episodes from the life of a saint or martyr.
2 : mystery play.

6 0

3 years ago

How many different offspring genotypes are expected in a trihybrid cross between parents heterozygous for all three traits when

aalyn [17]

Answer:

27 genotypes and 8 phenotypes

Explanation:

Supposing that the genotypes of both of the parents are AaBbDd (A, B and D are dominant over a, b and d). After completing the Punnett square, you can predict the following offspring:

I add an image where you can see all the 27 genotypes and frequencies.

Finally, all the 8 phenotypes with the following frequencies:

27/64 A-B-D-

9/64 A-B-dd

9/64 A-bbD-

9/64 aaB-D-

3/64 A-bbdd

3/64 aaB-dd

3/64 aabbD-

1/64 aabbdd

Total 64/64

Note: when a phenotype is A-, it means that it came from either genotype, AA or Aa. The same applies to B- (BB or Bb) and D- (DD or Dd)

3 0

3 years ago

A bacterium that you isolated from pond water appears to use light for energy. Based upon this information, you inoculate the or

FinnZ [79.3K]

The question is incomplete as it does not have the options which are:

there was no sulfur compound added to the medium, that could be used as an electron donor.
no oxygen was added to the medium so the organism died.
there is some inhibitory chemical that is preventing the growth of the bacterium.
you were using the wrong type of sunlight as the energy source for the bacterium.

Answer:

There was no sulfur compound added to the medium, that could be used as an electron donor.

Explanation:

In the given question, the bacteria which are found in the pond uses light energy to use carbon dioxide and form the glucose molecule. These bacteria are known as phototrophic bacteria.

The process of photosynthesis requires an electron donor and an electron acceptor to use molecule.

The organism when provided the light and carbon dioxide artificially in a culture, the bacteria were not able to grow. The reason for this could be accounted as that there was no electron donor found in the media like sulfur which could donate the electron during the chain reaction.

Thus, the selected option is correct.

4 0

3 years ago