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tatiyna
3 years ago
8

The majority of aquatic animals have BLANK fertilization. A.internal B.external

Biology
1 answer:
Anni [7]3 years ago
7 0
Internal fertilization
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Distinguish between directional, stabilizing, and disruptive selection. Give examples.
Pepsi [2]
Distribution of phenotypes within a population may be impacted by different types of natural selection. These types of selection include;
Directional selection involves a change in the environment shifts of phenotypes observed. Example is the giraffe neck-length, where the length got longer and longer over time to reach the leaves at the top of trees.
Stabilizing selection , this is a selection where an average phenotype is favored. example is number of eggs laid by birds such that too many eggs will be a waste of energy because some chicks would starve.
Disruptive selection is a selection where individuals with an average value of a trait are affected most while those with values below average are affected least. Example small individuals are capable of hiding from predators while big individuals can not fit in the hiding place but instead will fight with predators.

8 0
3 years ago
3 types of protozoan diseases and their causative parasites ​
luda_lava [24]

Answer:

Hey there!

Malaria, Chagas Disease, and African trypanosomiasis are three kinds of protozoan diseases. Malaria, caused by Plasmodium Parasites. Trypanosoma cruzi causes Chagas Disease. Finally,  Trypanosoma causes African trypanosomiasis.

7 0
3 years ago
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What is located in the cytoplasm of a cell
True [87]
All of the organelles in eukaryotic cells such as the<span> nucleus, endoplasmic reticulum, and mitochondria, are </span>located in the cytoplasm!! Duh!!! haha pretty much everything is in the cytoplasm! 
4 0
3 years ago
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What is the major difference between bacterial chromosomes and eukaryotic chromosomes?.
Sphinxa [80]

The major difference between bacterial chromosomes and eukaryotic chromosomes is that bacteria have a single circular chromosome whereas eukaryotes have several linear chromosomes.

Eukaryotic chromosomes are present within the nucleus while prokaryotic chromosomes are found in the nucleoid (a region of the cytoplasm). The nucleoid does not have a membrane.

In eukaryotic chromosomes, DNA is wrapped around histone proteins, which is further compacted by supercoiling and folding. However, in prokaryotic chromosomes, DNA is supercoiled and held together by nucleoid-associated proteins.

Prokaryotic chromosome is very simple in comparison to the eukaryotic one. Prokaryotic chromosome lack telomeres and centromeres sequences which is found in the eukaryotic chromosomes.

To learn more about nucleoid here

brainly.com/question/14352975

#SPJ4

5 0
2 years ago
miRNAs can control gene expression by what action?A. degrading proteins as soon as they are formedB. inhibiting the catalytic ac
levacccp [35]

Answer:

C) binding to mRNAs and degrading them or blocking their translation

Explanation:

<u>miRNAs:</u>

miRNAs is the abbreviation of MicroRNAs. These are the small noncoding RNAs of ∼22 nucleotides which can not code for peptides. miRNAs are responsible for gene expression regulation at the level of post transcription. They can do so by forming complementary base pairing with target mRNA and inhibiting their translation.

They silenced mRNA by the following processes:

(1) Cleavage of the mRNA strand into pieces,

(2) stopping mRNA from translation into proteins by ribosomes.

(3) Shortening of mRNA poly(A) tail and destabilizing it.

5 0
3 years ago
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