Why does a cell need to copy its DNA before it divides? A) so both new cell have enough DNA
B) so the sister chromatids don’t have to get separated
C) so it has a different set of instructions

Answers

Answer 1

Answer:

Answer:

Explanation:

It can't be B because during mitosis, sister chromatids inevitably are separated. It can't be C because they are copied so they have the same instructions and know what to do. A is the best choice.

Answer 2

Answer:

Answer:

the correct answer is a and the proper name for this process is called DNA replication thx so much

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The list below includes three organ systems thatare directly used when a human runs.
circulatory system
muscular system
skeletal system
Which system should also be included in the list?
(1) immune system (3) digestive system
(2) reproductive system (4) nervous system

Answers

Answer:

4.) Nervous System

Explanation:

Nervous system helps in nervous coordination and it is the system that provide communication to all the parts of the body through electrical and chemical impulses.The two nervous system are;

1.)Central nervous system(CNS)

2.)peripheral nervous system(PNS).

The central nervous system control all behaviors and its is the largest part of the nervous system, with inclusion of the brain and the spinal cord.

Nervous system have communication with several other body systems

For instance, when we run the nervous system send message directly to other part of our body system such as; The circulatory system,muscular system and the skeletal system about the activities that is about to take place and that the Skeletal muscles need neural inputs to begins it's contraction.

NERVOUS SYSTEM because is the system that send messages to the other systems in body to function well

A young man wants to determine if he is a descendant of Henry of Navarre and Eleanor of Aquitainetwo of his favorite historical characters. He sends a cheek swab to a DTC company and is offered a choice (due to funding): The company can assess either the sequence of the man's Y chromosome or his mitochondrial DNA. Which should he choose?

Answers

Answer:

He should get his mitochondrial haplotype sequenced, given the genetic variation in mitochondrial sequences compared to Y chromosomes.

Explanation:

A haplotype is a group of genes within an organism that was inherited together from a single parent. The word "haplotype" is derived from the word "haploid," which describes cells with only one set of chromosomes, and from the word "genotype," which refers to the genetic makeup of an organism.

Genetic variation is a term used to describe the variation in the DNA sequence in each of our genomes. Genetic variation is what makes us all unique, whether in terms of hair color, skin color or even the shape of our faces.

The typical metazoan mitochondrial DNA (mtDNA) is a double-stranded circular DNA molecule, which encodes a conserved set of 37 genes, including 13 protein-coding genes (PCGs) plus the two ribosomal RNA (rRNA) genes and 22 transfer RNA (tRNA) genes.

This, together with other special characteristics such as faster evolutionary rates than nuclear genes, presumed maternal inheritance, and absence of recombination makes mitochondrial DNAs one of the most popular targets for population genetics studies and accurate identification.

Are plants or animals unicellular?

Answers

Plants and animals are multicellular (which means many) and Unicellular means only one cell. Please mark as brainliest answer if it helped

Plants are mostly unicellular, but neither of them are necessarily right. Plants and animals can be multicellular. Animals are mostly multicellular and plants are mostly unicellular. So plants. I hope this helps!

Consider the phylogenetic tree of Old World primates.According to the tree, which primates share the most recent common ancestor with humans?
A. gorillas
B. chimpanzees
C. bonobos and chimpanzees
D. bonobos and gorillas

Answers

Bonobos and chimpanzees.

Answer: c) bonobos and chimpanzees

The part of the ear that vibrates first when sound waves enter the ear is the

Answers

The answer is the eardrum. The eardrum is connected to 3 ossicles, the hammer, the anvil, and the stirrup or malleus. It is the part of the ear that vibrates first when sound waves enter the ear.

Why do banana plants have big leaves