Which of the following is NOT a phase in the menstrual cycle?A. ovulation
B. luteal
C. gastrulation
D. follicular

Answers

Answer 1

Answer:

Answer:

The asnwer is C. Gastrulation.

Explanation:

Gastrulation is one of the stages of early embryonic development through which the trilaminar germinative disk is formed, which is a structure with three differentiated embryonic layers that will give rise to all the organs and tissues of the embryo. Gastrulation occurs just after embryo segmentation and implantation, that is, when the embryo has already been divided into many cells, it has become a blastocyst and has managed to nest in the endometrium, beginning pregnancy.

Knowing this, it can be concluded that it is not related to the menstrual cycle.

Answer 2

Answer:

I believe the correct answer is gastrulation.

Explanation:

The menstrual cycle is divided into the follicular phase, the menstrual phase, ovulation phase and the luteal phase. The Ovulation phase is a phase between the menstrual cycle just before menstruation starts. Gastrulation on the other hand is a phase in embryogenesis after fertilization has occurred.

Further Explanation:

1. Ovulation phase:

This is a phase in between the menstrual cycle and is triggered by a hormone produced by the anterior pituitary gland and is called the Luteinizing hormone. The phase is when the egg has matured from the graafian follicle after it bursts. This egg will travel into the fallopian tube by the help of special structures called fimbriae hoping to be fertilized. If fertilized, the egg will attach to the uterus. If not, it is removed as menstrual blood during menstruation. In this stage, the basal body temperature of the lady increases and she will have more "feelings" for sexual intercourse.

2. Luteal phase:

It is triggered by the hormone Luteinizing Hormone (LH) that is released by the anterior pituitary gland. After the graafian follicle releases the ovum, it (graafian follicle) matures into the corpus luteum that produces copious amounts of the hormones progesterone and estrogen to prepare the uterus for implantation by thickening it and making the mucus of the cervix more thinner to allow passage of sperms. If the lady does not become pregnant, the corpus luteum will die and the uterine wall sheds in the menstrual phase.

3. Follicular phase:

This is the first phase and it starts on the first day the lady sees her period. It starts due to the anterior pituitary gland secreting the hormone follicle stimulating hormone (FSH) .The hormone will stimulate formation of ovarian follicles in the ovaries and only one matures and produces estrogen to inhibit all the other eggs from maturing and also thickening the uterus. It lasts for 14 days. The ovarian follicle matures into the graafian follicle that enters the ovulatory phase.

4. Gastrulation:

This is totally unrelated to the menstrual cycle and it is found in embryology after the egg has been fertilized during the menstrual cycle and matures into an embryo. In this stage of embryogenesis, there is formation of the gut of a developing embryo

Level: High School

Subject: Biology

Topic: Reproduction

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what is the biological definition of a species? a.a group of organisms that look alike b.a group of similar organisms that live in different areas c.a group of similar organisms that live in one particular area d.a group of organisms that can mate with each other and produce fertile offspring

Answers

Answer:

Option D, a group of organisms that can mate with each other and produce fertile offspring

Explanation:

Organisms belonging to a certain species are sexually compatible in mating or interbreeding. They have the natural potential to mate and produce offspring that can further mate with each other to produce further fertile offspring and this process must go on. An organism that reproduce asexually cannot be easily classified into a species. Also hybrid organism (that reproduce both sexually and asexually) cannot be classified into species.

Hence, option D is correct

D. A group of organisms that can mate with each other to produce fertile offspring.

Scientists compare two different plant species. In species A, the leaf color is controlled by two alleles. In species B, leaf color is controlled by three alleles. How will these two plants be different?A. Species B will have fewer genotypes.
B. Species B will have fewer phenotypes.
C. Species A will have more genotypes.
D. Species A will have fewer phenotypes.

Answers

The answer is D. Species A will have fewer phenotypes.
Alleles are alternative forms of a gene. In species A, the leaf color is controlled by two alleles, for example, P and Q. They will have three possible genotypes - PP, PQ, and QQ. Three different genotypes give maximum three phenotypes.In species B, leaf color is controlled by three alleles, for example, L, M, and N. They will have six different genotypes - LL, LM, LN, MM, MN, and NN. Six different genotypes give maximum 6 phenotypes.

Amino acids are used to build what

Answers

amino acids are the monomers (building blocks) of protein enzymes

Answer:

proteins

Explanation:

hope this helps :)

Drag the labels to the appropriate targets to indicate the sequence of events occurring between fusion of the sperm and egg and formation of the fertilization envelope.

Answers

The fertilization process occurs when the sperm cell of the male and the egg cell of the female happens to intertwine in the formation of a single diploid cell which becomes a zygote in the upcoming process. Hence, this procedure then leads to the development of the fetus.

What information can be determined by observing dark lines within the spectrum of a given star? the elements present in the star's atmosphere the elements present in the star's inner core whether planets orbit the star the approximate size of the star

Answers

The information that can be determined by observing dark lines within the spectrum of a given star includes "the approximate size of the star" since the other options are unknown.

Answer:

the elements present in the star's atmosphere

Explanation:

The spectrum showing dark lines is an absorption spectrum. The dark lines actually indicated the energy absorbed by the elements present in the atmosphere of the star.

The elements absorb particular wavelengths and reach higher energy state. The absorbed wavelengths appear as dark lines in the spectrum.

Which describes the correct order of steps to be taken when casting a soil impression?A. Frame the impression, Photograph the impression, Clean the cast, pour the cast.

B. Photograph the impression, Frame the impression, pour the cast, remove the cast.

C. Frame the impression, Pour the cast, remove the cast, photograph the impression.

D. Pour the cast, remove the cast, clean the cast, Photograph the cast.

Answers

Photograph the impression, frame the impression, pour the cast, remove the cast is the one that describes the correct order of steps to be taken when casting a soil impression. The correct option among all the options that are given in the question is the second option or option "B". Casting is a great method for preserving some kind of impression to be looked at in the future.

Final answer:

The correct order when casting a soil impression is: frame the impression, photograph the impression, pour the cast, remove the cast, clean the cast.

Explanation:

The correct order of steps to be taken when casting a soil impression is as follows:

Frame the impression: Use a wooden or metal frame to carefully enclose the impression.
Photograph the impression: Take photographs of the framed impression from different angles to document its appearance.
Pour the cast: Mix the casting material, such as dental stone or plaster of Paris, and carefully pour it into the framed impression, filling it completely.
Remove the cast: Wait for the cast to harden completely, then carefully remove it from the frame and the soil impression.
Clean the cast: Remove any excess soil or debris from the cast using a soft brush or toothbrush.

This ensures that the soil impression is properly preserved and documented for analysis in forensic investigations.