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Bumek [7]
3 years ago
6

When fertilization occurs, what do we call the resulting cell? What is the term given to the cell according to the number of chr

omosomes it has?
Biology
1 answer:
s2008m [1.1K]3 years ago
8 0
It's called an embryo until it attaches itself to the uterus
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Two external features shared by amphibians and fish
uysha [10]
Meat hahahabbabsbabas
4 0
4 years ago
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Correct answer only please help me!
Ivenika [448]

Answer:

The correct option is <em>A) They represent injuries to skin and bone. Skin and bone are both organs.</em>

Explanation:

When Lindsey tripped, she got a cut in her skin at the knee area. The knee cap is a bone present in the knee protects the knee joint and articulates with femur. Both the skin and bones are organs of the body which are made up of different kinds of tissues.

Other options like option B is false because blood is not an organ, it can be considered as a tissue or a transporting fluid.

5 0
3 years ago
A certain first-order reaction a → b is 25% complete in 42 min at 25°c. What is the half-life of the reaction?
yan [13]

Answer:

t_{\frac{1}{2}} = 101.16 minutes

Explanation:

For a First order reaction, the rate constant is determined by

k = \frac{2.303}{t} log \frac{a}{a-x}

Where

k= rate constant

t= time required for a reaction

a= initial concentration

x= amount of reactant decomposed in time t

a-x= amount of reactant left after time t

Let the initial concentration be 100

Then

x = 25\\a-x = 75

Substituting the given values in above equation, we get -

k = \frac{2.303}{42} log \frac{100}{75} \\

k = 6.85 *10^{-3}

Also,

k = \frac{0.693}{t_{\frac{1}{2}} } \\t_{\frac{1}{2}} = \frac{0.693}{6.85 *10^{-3}}\\

t_{\frac{1}{2}} = 101.16 minutes

Read more on Brainly.in - https://brainly.in/question/6804668#readmore

7 0
4 years ago
Why does the selection of available seeds favor some beaks more than others?
Reptile [31]

Answer:

because the beaks are different and since they prefer other avaliable seeds.

because the population changes over time its called natural selection, in darwins drawings there were extremely different from eachother.

because when he drew normal finches and went to galapagos islands he saw that there were also finches but they looked completely different and he analyzed their beaks. there are animals who change over natural selection

Explanation:

8 0
3 years ago
Two chromosomes in a nucleus that carry genes controlling the same inherited characteristics are
Svetlanka [38]

Answer:

The correct answer is: homologous chromosomes.

Explanation:

Diploid species like us humans have two sets of the same 23 chromosomes: 1 set of chromosomes is inherited from our mother, the other set we inherit from our father, making up a total of 46 chromosomes in every somatic cell (sexual cells have only one set of chromosomes - they're haploid).

<u>Two chromosomes are </u><u>homologous</u><u> when they belong to the same pair and have the same genetic information, although they can have a few variations</u>. These variations from one homologous chromosome to the other are called<em> alleles</em> and represent the different phenotypic variables that can result from the same gene. If these alleles are different from one another, only one of them will express itself (there are a few exceptions, like blood type) as the organism will be heterozygous for this trait; if the alleles are the same, the individual will be homozygous for the trait.

This is the basis for Mendelian inheritance.

4 0
3 years ago
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