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Dmitry [639]
4 years ago
15

How does natural selection occur

Biology
1 answer:
Alina [70]4 years ago
3 0
Natural selection occurs when some of those traits help some individuals survive and reproduce more than others.
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People who have AIDS are more likely than others to become ill with multiple infections because the pathogen that cause AIDS
vagabundo [1.1K]
Yes.. is this a true or false question cause if so its true.
4 0
3 years ago
Hi, I'm stuck on these questions. Thanks in advance :) 1a. If an ovum is released by the ovary but is NOT swept into the infundi
MA_775_DIABLO [31]

Answer:

If the ovary does not enter the fallopian tube, it falls into the abdominal cavity and cannot be fertilized unless it finds it's way back to the uterus. Ectopic or tubular pregnancy would cause the fallopian tube to swell and eventually rupture.

Explanation:

When ovaries are released by the oviduct, it enters the fallopian tube, fertilizes and moves to the uterus where it is implanted. But if the ovum does not enter the fallopian tube, which could be as a result of an abnormality or the fallopian tube removed to prevent pregnancy or for medical reasons, then the ovum enters the abdominal cavity.

Pregnancy is still possible in this case if the ovum finds its way back to the uterus or IVF is been administered to the patient to induce pregnancy.

Ectopic or tubular pregnancy occurs when a fertilized egg is implanted in the fallopian tube. This is sometimes the case in the early weeks of pregnancy but eventually moves to the uterus. In severe cases, it would remain in the tube which in turn would make the tube swell and rupture.

4 0
3 years ago
What are the kingdom's or eukaryotes?
Bas_tet [7]
<span>Eukaryotes represent a domain of life, but within this domain there are multiple kingdoms. The most common classification creates four kingdoms in this domain: Protista, Fungi, Plantae, and Animalia. So like Animals, Plants, and Fungus</span>
4 0
4 years ago
Bonding that involves the exchange or gain and loss of electrons is known as
natulia [17]
ionic bonding.
Ionic bonding<span> is a type of </span>chemical bond<span> that involves the </span>electrostatic attraction<span> between oppositely charged </span>ions<span>, and is the primary interaction occurring in </span>ionic compounds<span>. The ions are atoms that have gained one or more </span>electrons<span> (known as </span>anions<span>, which are negatively charged) and atoms that have lost one or more electrons (known as </span>cations<span>, which are positively charged). This transfer of electrons is known as </span>electrovalence<span> in contrast to </span>covalence<span>. In the simplest case, the cation is a </span>metal<span> atom and the anion is a </span>nonmetal<span> atom, but these ions can be of a more complex nature, e.g. molecular ions like NH</span>4+<span> or SO</span>42−<span>. In simpler words, an ionic bond is the transfer of electrons from a </span>metal<span> to a </span>non-metal<span> in order to obtain a full valence shell for both atoms.</span>

5 0
3 years ago
The exchange of carbon dioxide and oxygen in the alveoli of the lungs is an example of what?
nignag [31]

Answer:

The correct answer is C) Passive transport

Explanation:

During the respiration process exchange of gases takes place between lungs and blood. This gas exchange is carried by simple diffusion which is a passive transport. Here gas molecule moves from area of higher concentration to the lower concentration area.

The lung's alveoli are surrounded by blood capillaries in which the concentration of CO2 is high while in alveoli concentration or partial pressure of CO2 is low so CO2 moves from blood to alveoli through diffusion.

In the case of oxygen, the concentration of oxygen is high in alveoli and less in blood inside blood capillaries so oxygen moves from alveoli to blood by diffusion. So the right answer is C.

7 0
3 years ago
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