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3 years ago

What is an extremophile? Give an example.

2 answers:

8 0

Animals or Organisms that live in extreme conditions like jellyfish with immense pressure at the bottom of the ocean. pls give brainliest homie

Shalnov [3]3 years ago

5 0

Answer:

Organism that can live in the extreme conditions.

Explanation:

The organisms that can live in extreme conditions whether it is physically or geochemically. They are detrimental to live in such conditions and survives there.

There are many classes of extremophiles, that range from extreme colder conditions to extreme hot conditions. Some of the organisms also survive in very low pH or at very high pH.

Example: Synechococcus lividus

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In evolutionary history, the first animals to successfully invade land from the sea were ___________________, an animal with a h

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Two genes determining a trait In primroses, the dominant allele of gene K is necessary to synthesize blue flower pigment. Blue p

viktelen [127]

Answer:

The ratio of blue to white offspring in the progeny is 4 blue : 12 white.

Explanation:

Available data:

The dominant allele K is necessary to synthesize blue flower pigment
K is inhibited by the dominant allele D

Plants with the genotype K- D- will not produce pigment (and their flowers will be white)

Cross: testcross for (Kk Dd) plants

Parental) KkDd x kkdd

Gametes) KD kD Kd kd

kd kd kd kd

Punnet square) KD Kd kD kd

kd KkDd Kkdd kkDd kkdd

Whenever D is present, it inhibits the expression of the K gene, so every plant with the dominant D allele will be white. This plants´ genotype is kkD- or K-D-.

Whenever D is absent and K is present, every plant with genotype K-dd will be blue.

The recessive form for K and D genes will express white-flowered plants, with genotype ddkk

F1) Progeny genotype: 4/16 KkDd, white-flowered plants

4/16 Kkdd, blue-flowered plants

4/16 kkDd, white-flowered plants

4/16 kkdd, white-flowered plants

The ratio of blue to white offspring in the progeny is 4 blue : 12 white.

Blue-flowered plants: 4 Kkdd

White-flowered plants: 4 KkDd + 4 kkDd + 4 kkdd

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4 years ago

What are the four major fields of study in earth science?

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Geology, Meteorology, Oceanography, and Astronomy

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3 years ago

Place these developmental milestones in the correct order. (1 being the first milestone to happen) baby is born different cell l

GenaCL600 [577]

Answer:

The correct order in which development occurs from fertilization of the egg is:

Sperm fertilizes egg .
Cell divides.
Implants size and weight increase greatly.
Different cell layers form .
Organs and limbs form embryo.
Heartbeat/movements detected .
Movements strengthened .
Organ systems mature .
Baby is born.

Explanation:

Sperm fertilizes egg: it is the process called fertilization, which consists of the union of the paternal gametes to originate the zygote.
Cell divides: Once the zygote has formed, it undergoes successive divisions by mitosis, to originate the different structures.
Implants size and weight increase greatly: successive divisions cause the implanted zygote to progressively increase in size.
Different cell layers form: consists of the formation of the embryonic layers -ectoderm, mesoderm and endoderm- from which the tissues and organs of the embryo will be formed.
Organs and limbs form embryo: from the three embryonic leaves the different apparatuses and sisythems of the embryo are formed.
Heartbeat / movements detected: Initiates the function of organs such as the heart and extremities.
Movements strengthened: movements in the embryo are more continuous and defined.
Organ systems mature: the nervous, cardiovascular, digestive and respiratory systems, among others, are suitable for birth.
Baby is born.

When the baby is able to survive outside the womb, birth occurs.

Learn more:

Development of the offspring brainly.com/question/465851

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3 years ago