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irina1246 [14]
3 years ago
10

Which type of fault creates oceanic rifts and rift valleys?

Biology
1 answer:
ra1l [238]3 years ago
7 0

Answer:

divergent plate boundary

A rift valley is formed on a divergent plate boundary, a crustal extension or spreading apart of the surface, which is subsequently further deepened by the forces of erosion.

Explanation:

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It does not seem particularly surprising to us that we might find gill pouches, tails, or other such structures in humans. But w
Pavel [41]

Answer:

In the course of evolution mammals are the animals which are evolved recently as compared to other groups such as fish, amphibians, or reptiles.

In addition, fur or hairs on body, mammary glands, middle ear bone, warm-blood, et cetera are the characteristics of mammals.

These characteristics were evolved during the course of evolution; they were not present in ancestral organisms.

However, tail, gill pouches, et cetera are characteristics of our ancestral groups. Thus, characters can be sometimes observed in mammals.

But mammals characteristics can not be observed in organisms which were evolved before mammals such as fishes, amphibians, reptiles, et cetera.

5 0
3 years ago
Do you think it could be ethical to hunt a species to extinction to meet the needs and wants human society
Luda [366]

Answer:

No

Explanation:

This species that we would be killing off is innocent and not volunteering for this.

8 0
3 years ago
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food and territory are balancing factors in an ecosystem what type of phenomena balance these factors
Elanso [62]

Answer:

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7 0
2 years ago
A female fly that has miniature wings and sepia eyes is crossed with a male that has normal wings and is homozygous for red eyes
Eduardwww [97]

Answer and Explanation:

  • The gene that expresses the size of the wing is X-linked. The dominant allele expresses long wings, XM, while the recessive allele expresses miniature wings, Xm.  
  • The gene that expresses the color of the eyes is autosomal. The dominant allele expresses red color, S, and the recessive allele expresses sepia color, s.

A <em>female fly</em> that has <em>miniature wings and sepia eyes</em> (<em>XmXm ss</em>) is crossed with a <em>male</em> that has <em>normal wings and is homozygous for red eyes (XMY SS). </em>

The F1 are intercrossed to produce the F2.

1º Cross:

Parental) XmXm ss    x    XMY SS

Gametes) Xms   Xms     Xms   Xms  

                XMS   XMS    YS    YS

Punnet Square)    Xms           Xms            Xms             Xms

                XMS   XMXmSs    XMXmSs   XMXmSs    XMXmSs

                XMS   XMXmSs    XMXmSs   XMXmSs    XMXmSs

                YS      XmY Ss      XmY Ss       XmY Ss       XmY Ss

                YS      XmY Ss      XmY Ss       XmY Ss       XmY Ss

F1) 1/2 or 50% of the progeny are females and the other 1/2 or 50% are males

  100% of the females (1/2 or 50% of the progeny) are long-winged and  red-eyed

    100% of the males (1/2 or 50% of the progeny) are miniature.winged and red-eyed.

2º Cross:

Parental) XMXm Ss      x      XmY Ss

Gametes) XMS   XMs  XmS  Xms

                XmS   Xms  YS    Ys

Punnet Square)       XMS             XMs          XmS             Xms

                  XmS    XMXm SS  XMXm Ss   XmXm SS   XmXm Ss

                  Xms    XMXm Ss   XMXm ss   XmXm Ss    XmXm ss

                   YS      XMY SS     XMY Ss      XmY SS        XmY Ss

                   Ys       XMY Ss     XMY ss       XmY Ss        XmY ss

F2) 8/16=4/8=1/2 or 50% of the progeny are females and the other 1/2 or 50% are males

<u><em>Females (8/16)</em></u>:    

  • 3/8 of the females are long-winged and red-eyed, XMX- S-
  • 1/8 of the females are long-winged and sepia-eyed, XMX- ss
  • 3/8 of the females are miniature-winged and red-eyed, XmXm S-
  • 1/8 of the females are miniature-winged and sepia-eyed, XmXm ss

<u><em>Males (8/16)</em></u>:    

  • 3/8 of the males are long-winged and red-eyed, XMY S-
  • 1/8 of the males are long-winged and sepia-eyed, XMY ss
  • 3/8 of the males are miniature-winged and red-eyed, XmY S-
  • 1/8 of the males are miniature-winged and sepia-eyed, XmY ss  

Note: The symbol "-" means that in its place might be a recessive allele or a dominant allele. For example, <em>S-</em> means that it might be <em>SS</em> or <em>Ss</em>.  

4 0
3 years ago
What do scientists know about the future of the universe? Check all that apply. that dark matter exists what dark matter is made
Gala2k [10]

The correct answers are:

• that dark matter exists

The existence of dark matter (invisible matter) is generally accepted and it is believed that this matter is about 85% of the total matter in the universe and it is composed of undiscovered subatomic particles.

• that invisible matter must be influencing the rotation of galaxies

Dark matter is crucial for explaining why galaxies can spin without tearing themselves apart.

7 0
3 years ago
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