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yuradex [85]
3 years ago
8

Does a spider have a heart?

Biology
1 answer:
frutty [35]3 years ago
5 0
Yes all animals humans and bugs have hearts
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If chromosomes fail to separate during cell division ________________ can occur. This can result in cells with the incorrect num
storchak [24]

Answer:

1. NONDISJUNCTION

2.Aneuploidy

3.Trisomy

4.Monosomy.

5.3.

6.Trisomy 21.

Explanation:

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3 years ago
1.Watson and Crick knew that the triple helix model of DNA that Linus Pauling had proposed was incorrect. What evidence did they
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3 years ago
As of 2015. the NPS found only three wolve left on Island Royale - a
bulgar [2K]

Answer:

Inbreeding leaves animals susceptible to genetic disease, and populations to reduced fitness. This family of three would not be able to sustain a population given their a) group dynamics and b) genetic variation

Explanation:

In small populations, the variation in genetic material is likely to be low. The consequence of this is that there is increased homozygosity. That means less members of the population carry two different alleles of a gene for any given trait. This increases the chance of the appearance of recessive traits, which could be disease causing or otherwise reduce fitness.

With only three related individuals left, the chances of generating a new and thriving population with the limited genetic material is almost non existent, especially considering the animals are a male, female and their pup

7 0
3 years ago
In how many cells are the functions of unicellular organisms performed?
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The root word of Unicellular already tells you the answer. Uni means only one cell. So the answer is one cell.
4 0
3 years ago
Word bank: (Thermosphere) (Aurora boreal is) ( Large-scale air turbulence and mixing at this layer) ( Stratosphere) (The coldest
Lyrx [107]
  • Thermosphere - Fourth layer of Earth's atmosphere.
  • Aurora Borealis - Ionosphere layer of thermosphere.
  • Large-scale air turbulence and mixing at this layer - Troposphere
  • Stratosphere - Second lowest layer of Earth's atmosphere. No Air turbulence so airplanes fly in this layer.
  • The coldest temperatures in the atmosphere occur at the junction- of Stratosphere and mesosphere
  • Maximum ozone - Ozone layer in Stratosphere

Explanation:

Atmosphere is formed by mixing of gases. The layers of atmosphere is given below.

1. Troposphere -

  • The first layer of the atmosphere.
  • Weather occurs in this layer.

2.Stratosphere -

  • The second layer of Earth's atmosphere.
  • Contains Ozone layer.

3. Mesosphere -

  • The third layer above the stratosphere.
  • Coldest layer.

4. Thermosphere -

  • The fourth layer of the atmosphere.
  • Warmest layer.
  • Ionosphere - lowest level of thermosphere above mesosphere.
  • Aurora Borealis, Northern and Southern lights are seen in this layer.
  • Exosphere - outermost layer of thermosphere.
  • Satellites are in this layer.
  • Outer space with no gravity.

5 0
3 years ago
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