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Ulleksa [173]
3 years ago
6

_______ are thought to have been present before vertebrates.

Biology
1 answer:
Zina [86]3 years ago
5 0

Answer:

Explanation:

i m not confirmed but i think hag fishes are present before vertebrates

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Which of the following is a slow moving nutrient<br> A. oxygen<br> B. phosphorus<br> C. hydrogen
pav-90 [236]

Answer:

<u>B</u>

Explanation:

Slow moving nutrients include Nitrogen and Phosphorus.

5 0
2 years ago
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Is it possible for a whale in captivity to live after it has been realsed
koban [17]
The possibility of release is only possible if the whale has only been in captivity for a short time. An example of this is Springer, the killer whale that was treated for emaciation and nursed back to health before being rehabitated and ruined to their pod. For orcas like the whales at Seaworld (which has just been banned from further breeding! Yay!), these whales are unable to be released as they have been in captivity their whole life. All animals, including marine mammals, can be imprinted by human interaction. Captive whales are accustomed to being fed by humans and do not know how to fend for themselves in the wild. If they were released into the wild, these tame whales may attack boats and humans, thinking they will feed them and inevitably starve to death because they are unable to hunt. Whales live in pods otherwise known as their whole life. They hunt and feed with them. If a captive whale were to be released, it would be unable to hunt as they wouldn't have a pod that would assist them.
4 0
3 years ago
Use the information in the chart to determine if it describes a living object. composed of cells complex chemical activities com
Solnce55 [7]

The object is a living thing; option B

<h3>What are living things?</h3>

Living things are things that have life in them.

The basic activities of living things are given as follows:

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  • nutrition
  • Irritability
  • growth
  • excretion
  • respiration

Considering the information in the chart about the object:

  • composed of cells
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These are characteristics of living things, therefore, the object is living.

In conclusion, living things carry out the activities of life.

Learn more about living things at: brainly.com/question/280237

#SPJ1

8 0
1 year ago
15
Anastaziya [24]
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7 0
2 years ago
What do we call the process where part of the DNA is saved during replication?
Nataly_w [17]

Answer:

The process where part of the DNA is saved during replication is known as semi conservative replication.

Explanation:

During cell division, a cell must first replicate its DNA (Deoxyribonucleic acid).  When a cell divides into daughter cells , the DNA of the parent cell must be copied because DNA contains the genetic material of an organism. DNA replication is the process in which DNA is copied  during the cell  division cycle.  During replication, the complementary strands of the original double helix DNA are separated and one of the two strands in the original molecule is saved in the new DNA molecule. Thus the new DNA molecule is made of an original strand and a newly synthesized strand. So the DNA replication is known as semi conservative replication. Each strand of the original DNA molecule is referred as the template strand because it provides information for the production of newly synthesized strand. It takes place inside the nucleus of a cell during the s stage  of the cell cycle. During replication, helicase enzyme breaks the hydrogen bonds between the complementary bases (Adenine with Thymine, Cytosine with Guanine) and unwinds the double helix of DNA. The two separated strands create a Y-shaped replication fork and act as templates for the synthesis of new strands of DNA. Enzymes known as DNA polymerases create the new strands.

6 0
3 years ago
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