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aleksandrvk [35]
3 years ago
9

7. According to the fossil record, which group of organisms has existed for the greatest length of time? (1) gastropods (3) mamm

als
(2) corals (4) vascular plants
Biology
1 answer:
Ket [755]3 years ago
4 0

Answer:

4)vascular plants

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Determine the offspring genotypes:<br>​
sergiy2304 [10]

Answer:

PP × pp = Pp, Pp, Pp, Pp

Pp × pp = Pp, pp, Pp, pp

3 0
3 years ago
The similarities of a birds wing and an insects wing are evidence of what.
Y_Kistochka [10]

They both have similar environments, which show they have evolved similar behaviors and appearances. hope this helps <3

4 0
3 years ago
❥SCIENCE SUBJECT
Fiesta28 [93]

9514 1404 393

Answer:

  • time: 1.122 seconds
  • range: 10.693 m
  • maximum height: 1.543 m

Explanation:

<u>Given</u>:

  runner is launched at 30° angle to horizontal at 11 m/s

  acceleration due to gravity is g = -9.8 m/s²

<u>Find</u>:

  runner's hang time

  runner's distance to the landing point

  runner's maximum height

<u>Solution</u>:

The (horizontal, vertical) speed components will be ...

  (11 m/s)(cos(30°), sin(30°)) = (5.5√3 m/s, 5.5 m/s)

The time of flight can be found from the height formula:

  h(t) = 1/2gt² +vt . . . . . . where v is the vertical speed at launch

The time we're concerned with is the time when h(t)=0 and t>0.

  0 = -4.9t^2 +5.5√3t = t(-4.9t +5.5√3)

The second factor is zero when ...

  t = (5.5√3)/4.9 ≈ 1.122 . . . seconds hang time

__

The distance to the landing point will be the product of horizontal speed and hang time:

  d = (5.5 m/s)(5.5√3/4.9 s) ≈ 10.693 m . . . . distance to landing

__

The maximum height can be found from the formula (based on conversion of kinetic energy to potential energy) ...

  h = v²/|2g| = (5.5 m/s)²/(2(9.8 m/s²)) ≈ 1.543 m . . . . maximum height

4 0
3 years ago
What do scientists believe may have happened to leave Mars vulnerable to the solar winds?
ratelena [41]
The outer core of Mars cooled too quickly and the magnetic field didn't have time to fully form so the solar winds destroyed the magnetic field and the atmosphere
8 0
4 years ago
DELETION OF SNORD116, A PRADER-WILLI SYNDROME CANDIDATE GENE, DOES NOT AFFECT CIRCADIAN RHYTHMS IN MICE MODELS
Vlada [557]

Prader-Willi syndrome (PWS) is a gentic disorder which has an impact on numerous physiological systems. PWS affected individuals (specifically babies) experience delayed growth, significant hypotonia (low muscle tone), and feeding issues. It does effect circadian rhythms in mice models.

SNORD116, often referred to as HBII-85, is a non-coding RNA (ncRNA) molecule that contributes to the alteration of other small nuclear RNAs (snRNAs). Unlike the majority of other snoRNAs, SNORD116 is not significantly complementary to ribosomal RNA and is expressed widely in the brain (but not in PWS patients).

According to the studies, SNORD116 cause sleep defect in patients with Prader-Willi syndrome. Same observation was seen in mouse models too. Paternal expression of SNORD116 is thought to be a potential gene for the sleep disruptions/circadian rhythm’s that the majority of PWS sufferers.

To learn more about circadian rhythm click here

brainly.com/question/6434404

#SPJ4

3 0
1 year ago
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