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Elenna [48]
3 years ago
7

The batteries in pacemakers do not last forever and eventually need to be

Biology
1 answer:
ASHA 777 [7]3 years ago
8 0

Answer:

hey can i priviet  message you

Explanation: you sound really smart and cute

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A dark brown/black layer surrounding most of the eye which prevents light scatter within
Novay_Z [31]
The answer is Choroid.
5 0
3 years ago
Which circulation ensures proper levels of nutrients in the blood for newborns through adults?
Andrei [34K]
The answer to this question is D
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3 years ago
Eukaryotic sexual life cycles show tremendous variation. Of the following elements, which do ALL sexual life cycles have in comm
larisa [96]

Answer:

II. meiosis

III. fertilization

IV. gametes

Explanation:

Gamete formation and fertilization are the processes performed by all the sexually reproducing organisms. Gametes are the cells that are formed in the male and female sexual organs of these organisms. Formation of gametes occurs by meiosis and therefore, the gametes of a diploid organism are always haploid.

Male and female gametes fuse during the process of fertilization and form the zygote which in turn divide repeatedly to produce an embryo. For instance, sperms and eggs are the male and female gametes that are formed in testes and ovaries of male and female human individuals respectively. The fusion of sperm and egg produces a zygote that finally develops into a young one.  

8 0
2 years ago
A zygote is made by the process of
NemiM [27]

The correct answer is meiosis. This is because a zygote is a 2n diploid cell caused by human fertilization witch is meiosis. This shows that the correct answer is meiosis. There are two things needed witch are the two gametes. These two gametes are called the egg(female) and the sperm(male).

If this was helpful don't forget to mark me brainiest.

4 0
2 years ago
What type of disorder is sickle cell anemia?<br> A.recessive<br> B.lung<br> C.dominant
Tom [10]

Answer:

A Recessive

Explanation:

Generally, there are two types of disorders, progressive and recessive. When something is recessive, it is not a dominant gene. The reason why sickle cell anemia is classified as a recessive disorder is because it only affects some people, but it does not affect all those who share DNA. Hope this helps!

4 0
3 years ago
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