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Schach [20]
3 years ago
10

Changes in a population over time is due to what

Biology
1 answer:
irinina [24]3 years ago
8 0

Answer:

Due to different circumstances.

like marriage which creates increase in population

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How many double-helical DNA molecules will be present in the sperm and egg cells of dogs that are diploid animals that contain 7
ElenaW [278]

Answer:

39 double helical DNA molecules.

Explanation:

  • Meiosis always produces haploid cells.
  • Sperm and Eggs are produced after meiosis.
  • So, sperm and egg cells of dog would have 39 chromosomes and one double helix DNA molecule is present in each chromosome comprising 39 double helical DNA molecules.

<em>A chromosome has one DNA molecule before replication and have two DNA molecules after DNA replication.</em>

<em />

5 0
3 years ago
Which gland only secretes once a person has entered puberty?O holocrineO apocrineO merocrineO No answer text provided.
VMariaS [17]

The pituitary gland and hypothalamus are fully capable of synthesizing and releasing GnRH, LH, and FSH, but this does not occur until the onset of puberty. Therefore, the "no answer text provided" is the correct alternative for this question.

7 0
1 year ago
This is the act of trying to find the answer to an unknown question by the use of experimentation and research.
Vikentia [17]

Answer:

Question Answer

Inquiry This is the act of trying to find the answer to an unknown question by the use of experimentation and research.

Investigation This is the process of researching or studying a concept. Examination, inquiry

Explanation:

7 0
3 years ago
Which forms of viral hepatitis are transmitted through the fecal-oral route?
e-lub [12.9K]

Answer:

Hepatitis A

Explanation:

  • Amongst the several types of viral hepatitis, it is hepatitis A that can spread through the fecal-oral route.
  • Usually, a person can acquire hepatitis A if he/she ingests contaminated food or water, further it can also spread through direct contact with the infected person.
  • due to its transmission through the fecal-oral route, lack of good sanitation practices and hygiene are the major causes for its spread.
5 0
3 years ago
Beryllium is one of the elements that scientist can use as a cosmic clock to determine age true or false
wariber [46]

Answer:

False

Explanation:

Beryllium is used in alloys with copper or nickel to make gyroscopes, springs, electrical contacts, spot-welding electrodes and non-sparking tools. Mixing beryllium with these metals increases their electrical and thermal conductivity.  Other beryllium alloys are used as structural materials for high-speed aircraft, missiles, spacecraft and communication satellites.  Beryllium is also used in nuclear reactors as a reflector or moderator of neutrons.

3 0
3 years ago
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