Biology

Mitotic divisions, called Mitosis result in a hollow ball of cells, called a __

Need help ?-blastula or sometimes called a blastocyst

______, useful in recombinant DNA technology, are bacterial enzymes that recognize and cut specific sequences.

(2 words)-They are called restriction enzymes or restriction endonucleases.You can read more about them here http://en.wikipedia.org/wiki/Restriction…

Two ways a synthetic biologist can change the course of evolution.

Alter the genetic code of an organism, or change the organisms environment, causing forced adaptation or gradual evolutionary shift that would differ from normal processes.

Why are the mouth parts located on the ventral part of the crayfish

1.It makes it easy for the animal to take a bite out of something thats below it.Watch a crayfish thats gnawing on a stump of elodea. 2.The first two pairs of walking legs hand small bits of food to

RNA interference (RNAi) can be used to silence a gene, and it holds promise for treatin certain...

...genetic disorders and viral infections. a. true b. false-A. True Plants use RNAi and it is also found in C. elegans, and many other organisms as a mode of protecting the organism against harmful

I need some biology help please,

My biology exam is tomorrow and i cant seem to find the answer to these few questions, : 1. The evolutionary history of a species is its ______a.) extinctionb.) phylogenyc.) biodiversityd,) taxonomy

Describe an experiment to investigate the effect of ph on the growth of yeast.

If possible in IGCSE format or just explain how to do it....??? Thanks!-I just gave the IGCSE Edexcel exam with this as the last question and here is what i wrote: 1. Add yeast to a sugar solution and

Plasmids that can exists in disparate species, such as a bacterium and a plant cell, are called ______ vectors

, and they can be used to transfer cloned DNA from one type of organism to another.-They are called shuttle vectors.You can read more about them here http://en.wikipedia.org/wiki/Shuttle_vec…

A culture of identical cells, each derived from a single "parental cell," is referred to as/an...

A colony, or a cell line, or a stem cell line.-Abused emo children.

During ___ the hollow ball of cells burrows into the lining of the uterus.

simple answer get 10 points??-implantation

The introduction of external pieces of "naked" DNA from solution into a cell is referred to as ________.

transformation

In genetic engineering, antibiotic resistance is often cloned into a vector to _______

a. kill bacteria b. select for cells that cannot grow c. make direct selection of a clone possible d. enhance survival of the cloned cell-Your answer is c Antibiotic resistance genes are often includ

What types of mutation that affect segments of chromosomes are least likely to be important in evolution

Explain please.-My answer would be Deletion. Deletions result when a gene is mistakenly removed from a chromosome, again often as a result ofunequal crossing over. Often zygotes produced by gametesin

Which one of the following is NOT a purpose of genetic modification

a. create proteins used in vaccines (e.g.,hepatitis B vaccine) b. remove antibiotic resistant plasmids from bacteria c. create hormones such as insulin or human growth hormone d. create multiple copie

The process of making multiple copies of a DNA molecule is referred to as ______.

a. transformation b. DNA fingerprinting c. protoplast fusion d. hybridization e. amplification-i think its E too cause when i read this question, i immediately thought of PCR http://www.youtube.com/