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4 years ago

What Cell division process creates 2 genetically identical diploid cells

1 answer:

5 0

I believe its own anaphase, when Mitosis creates two identical diploid cells, (Fact, Diploid cells in plants are usually know as zygotes and will eventually become the species they were produced by.

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An example of an indicator species is the sea otter. Without sea otters, sea urchins would overgraze on kelp beds, dramatically

Bezzdna [24]

False. sea otters dont really eat sea urchins and not much would chang

6 0

4 years ago

Pseudohypertrophic muscular dystrophy is a human disorder that causes gradual deterioration of the muscles. Only boys are affect

andriy [413]

The answer is; C

It is caused by the recessive allele because the parents appear normal but are carriers of the disorder (meaning they are heterozygous for Pseudohypertrophic muscular dystrophy). Only when the offspring is heterogenous recessive do they display the disorder.

The disorder is also sex-linked because it tends to affect only boys. This means that the disorder is probably coded for by alleles in the Y- chromosome that determines the male sex.

6 0

3 years ago

What are the characteristics of cnidarians?

dexar [7]

Answer:

Explanation:

GENERAL CHARACTERISTICS OF CNIDARIANS

1)They are entirely aquatic, some in fresh water but mostly marine. *

2)Radial symmetry (can be cut into two equal halves by one plane passing through the center of the mouth) or biradial symmetry around a longitudinal axis with oral and anoral ends;no definite head.*

3)Two basic types of individuals : polyp which is sessile and attached,and reproduce asexually; Medusa-which is free swimming.

Polymorphism is a characteristics of many species, i.e,both polyp and medusa occur in same specie.*

4)Exoskeleton or endoskeleton is of chitinous, calcerous,or protein components in some.*

5)Body with two layers, epidermis(ectoderm) and gastrodermis (endoderm) with structureless mesoglea in between,so, they are diploblastic animals.*

6)They have special stinging cell organelles called nematocysts in either in either endodermis or gastrodermis or in both;nematocyst abundant on tentacles.*

7)An internal body cavity, the gastrovascular cavity, lined by gastrodermis and has a single opening, the mouth, which also serves as anus. No coelomic cavity, Extensible tentacles usually encirclethe mouth and are used for food capture.*

8)No excretory or circulatory system.*

9)Asexual reproduction by budding(in polyps) or sexual reproduction by gametes(in all medusa and some polyps); sexual forms are monoecious or dioecious; planula larva occurs. *

6 0

3 years ago

The pedigree below shows the inheritance of a dominant allele of a gene in a family over several generation. Circles represent f

olga nikolaevna [1]

Complete question:

You will find the pedigree in the attached files

Answer:

The correct option is C) maternal mitochondrial mutations are inherited by all of a mother's offspring.

Explanation:

Mitochondrial inheritance is one of the ways in which a disease or a trait might be inherited from the maternal line.

Most of the DNI is located in the nucleus, but there is also DNI in mitochondria. Sperm cells hardly carry mitochondria, so mitochondrial DNI is mostly inherited from the maternal side. If there exists any mutation in this DNI, the whole progeny of the mutated woman will be affected, as they will get the mother´s mitochondria carrying the mutation. On the contrary, if there is a man affected by a disease caused by a mutation in mitochondrial DNI, non of their descendants will get the disease.

In the exposed pedigree, we can see that the mother is affected by the disease, but the couple had two daughters, and only one of them was affected, while the other one was not. This tells us that the mutation occurred on a nuclear chromosome. If the mutated allele was in mitochondria, both daughters would be affected.

7 0

3 years ago

The part of the brain stem that regulates vital activities such as heartbeat, breathing, and digestion is the:_____.

xxMikexx [17]

The part of the brain stem that regulates vital activities such as heartbeat,breathing and digestion is the Medulla oblongata. The bottom part of brain which regulate your breathing,heart rhythms,blood pressure and swallowing.

The respiratory center is located in the medulla oblongata and is involved in the minute-to-minute control of breathing.It's locate where the brain and spiral cord connect, it help in control vital processes like our heartbeat, breathing and blood pressure.

This also responsible for reflexes of the face and throat like - coughing,sneezing,gagging. It can lead to respiratory failure, loss of sensation, paralysis,it causes 'brain death" and person can not survive.

To learn more about Respiratory center here

brainly.com/question/14446082

#SPJ4

7 0

2 years ago