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aniked [119]
2 years ago
14

Define nucleus and nucleolus

Biology
2 answers:
zhenek [66]2 years ago
5 0

The nucleolus is a structure found in the nucleus of cells and it forms around specific chromosomal regions in the nucleus of eukaryotic cells, and is made up of proteins and ribonucleic acids. Its main function is to transcribe ribosomal RNA (rRNA) and combine it with proteins to form incomplete ribosomes

RSB [31]2 years ago
3 0

Answer:

Nucleus

the central and most important part of an object, movement, or group, forming the basis for its activity and growth.

Nucleolus

a small dense spherical structure in the nucleus of a cell during interphase.

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Explain how a mutation in an individual's DNA occurs and describe the effect it may have the individuals traits?
baherus [9]
If the DNA strand is mutated it can cause genetical and physical defects. Just as an extra chromosome can cause Trisomy 21 which cause Down Syndrome.
7 0
3 years ago
Please answer these questions I'll give 40 brainliest and you will help me so much
Kisachek [45]

Answer:

10:  Number of protons always equal number of electron, but that's the case with a neutral atom. ... This implies that it has same number of protons and electrons in it. It means it has same amount of positive and negative charge, which cancel each other, and the atom as a whole becomes electrically neutral.

19: The three stable isotopes of Argon, Argon-36, Argon-38, and Argon-40, would all have 18 protons and 18 electrons if they are all neutral. The three isotopes will have different numbers of neutrons compared to each other (18, 20, and 22 neutrons respectively).

20: This isotope of fluorine has 9 protons, 9 electrons and 10 neutrons.

Explanation: Hope those are the only answers you needed. I just saw the stars next to them and figure those were the only ones you needed.

8 0
2 years ago
Write function of snakes hard scales
Goryan [66]

Answer:

The answer to this question is given below in this explanation section.

Explanation:

                  "function of snakes"

Snakes are elongated,legless,carnivorous reptile of the suborder serpents.Like all other squamates,snakes are exothermic,amniotic vertebrates covered in over applying scales.Many species of snakes have skulls with several more joints than their lizard ancestors,enabling them to swallow prey much larger  than their heads with their highly mobile jaws.To accommodate their narrow bodies,snakes,oared organ appear one in front of other instead of side by side,and most have only one functional lungs.Some species retain a pelvic girdle with a pair of vestigial claws on either side of the cloaca.Legless lizard have eyelid and external ear.

A scale protect the body of the snakes,aids it in locomotion,allows moisture to be retained within,alters the surface characteristics such as roughness to aid in camouflage,and in prey capture (such as Acrochordus).

Snake scale originates from the epidermis.The integument of the snakes in covered with two primary scale type,both originating from the epidermis.Small scale over the dorsum and lateral surface of the snake.Whereas larger scales cover the vent rum.

5 0
2 years ago
A student writes two statements about the importance of soil.
Gnoma [55]
I'm not sure but it might be C
7 0
2 years ago
Women have a tendency to retain water during part of the menstrual cycle because estrogen mimics the action of what
Ira Lisetskai [31]

Answer:

This question lacks options, options are:

A) ADH

B) aldosterone

C) atrial natriuretic hormone

D) oxytocin

E) prolactin

The correct answer is B.

Women have a tendency to retain water during part of the menstrual cycle because estrogen mimics the action of <u>aldosterone</u>.

Explanation:

The female sex hormones produced by the ovary (estrogens and progesterone) are substances that, through the blood, will carry messages to all the organs of the female genital system (uterus, tubes and ovaries) to achieve their correct function. Aldosterone concentration normally increases at the time of ovulation and remains elevated during the luteal phase of the menstrual cycle. Women present during the premenstrual phase, compared to the luteal and follicular phases, an increase in body weight, due to an increase in fluid retention, this because the menstrual cycle modulates the renin-angiotensin-aldosterone system. High levels of estrogen and progesterone in the mid-luteal phase are associated with a greater increase in adrenal and renal hormones and retention of more volume.

5 0
3 years ago
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