BIOLOGY MIDDLE SCHOOL

What do all multicellular organisms need for sexual reproduction to occur? A.
pollen

B.
spores

C.
seeds

D.
gametes

Answers

Answer 1
Answer:

All  multicellular organisms need gametes for sexual reproduction to occur. Option D is correct.

Sexual Reproduction:

It is method of reproduction in which gametes of two different parents fertilize to for zygote.

  • Gametes are the haploid cells such as sperm and egg.
  • Fertilization is process by which gametes fuse together ton form a zygote.

Therefore, all  multicellular organisms need gametes for sexual reproduction to occur.

To know more about gametes,

brainly.com/question/19860559
Answer 2
Answer: gamete is the answer because,

a gamete is a a mature haploid male or female germ cell that is able to unite with another of the opposite sex in sexual reproduction to form a zygote.

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How does a bacterial cell differ from a plant or animal cell
How do organisms interact with the living andnon-living elements of their environments?
What is the BEST way to discover if there is water on the surface of Mars? A) Send space probes to Mars to study the surface B) Study the moon’s surface, since it is similar to that of Mars C) Observe the color of Mars to see if there are traces of blue D) Study meteorites on Earth, believed to have been rocks from Mars

Why aren't all cells the same

Answers

if all cells the same then you won't be able to touch... if everything is eye, where is listening, or touch...


like if you don't have hand, and all are foot... ugh.. my grammar's bad

I hope you understand
Every organism requires different cells to function. For example a plant cell differs from an animal cell because the plant goes through photosynthesis and requires a different cell than the animal cell

Male-pattern baldness is a X-linked recessive trait, labelled X^{\text{b}} b

start superscript, start text, b, end text, end superscript, with the dominant normal hair gene being X^{\text{B}}

B

start superscript, start text, B, end text, end superscript.

A father with the genotype X^{\text{B}}

B

start superscript, start text, B, end text, end superscriptY and a mother with the genotype X^{\text{b}}

b

start superscript, start text, b, end text, end superscriptX^{\text{b}}

b

start superscript, start text, b, end text, end superscript have a son.

What is the percent chance that the son will inherit male-pattern baldness?

Answers

Answer:

100%

Explanation:

Pattern baldness if X linked and recessive.

A father with X^BY and a mother with X^bX^b have a son.

First, let us look at the result of the cross between the two:

X^BY   x   X^bX^b

male progeny: X^bY, X^bY

female progeny: X^BX^b, X^BX^b

The two sons resulting from the cross inherited male pattern baldness. Hence, the percentage chance that the son will inherit male pattern baldness is 100.

contrast alleles are described as being dominant or recessive what is the difference between a dominant and recessive allele

Answers

dominant alleles can take over the recessive alleles if they were there 
and the other allele cant do the same as long as the dominant alleles don't 
come

Answer:

dominant alleles can take over the recessive alleles if they were there

and the other allele cant do the same as long as the dominant alleles don't

come

Explanation:

A ----- is a simplified representation of a real object or system.

Answers

Answer:

Model

Explanation:

  • A representation of a real object or system in its physics, conceptual or structural form is called the model of that object or system.
  • A model only represents an object or system but is not the object/system itself.
  • An example of the model of a system can be a model representing the water cycle which symbolically explains the systemic process and an example of a model of an object can be a globe which is a representative of the earth.
  • The model tries to simplify our understanding of the given object/system and hence there is a little deviation from the real object/system.
  • The purpose of the model is usually to provide basic knowledge regarding that particular object/system by giving a simpler representation.
Models are simplified representations of a real object or system.

Scientists often classify organisms based on their ability to perform certain processesWhich of the following shows an example of organisms being classified based on their physiological abilities?
A. Plants can make their own food using energy from the Sun.
Animals cannot make their own food.
B. Plant cells have cell walls.
Animal cells do not have cell walls
C. Animals and plants have membrane-bound nuclei
Bacteria do not have nuclei.
D.
Protists can be unicellular or multicellular
Bacteria are unicellular

Answers

Answer:

A. Plants can make their own food using energy from the Sun.

Animals cannot make their own food.

Answer:

A

Explanation:

What effect does temperature have on the characteristics of magma

Answers

Magma, like many other things, liquifies at high heat and it cools down and solidifies at low temperatures. Basically, while inside a volcano, magma is liquid and extremely hot and flows freely. When it bursts out, it becomes lava and starts cooling down due to the air and winds and things like that, so it starts turning into rocks and in time these rocks create new layers of the volcano. This is how many islands were formed.

As temperature increases the viscosity of magma decreases,so the magma flows more easily.
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